Merge pull request #664 from MichaelMure/combined-id-rework

bug: have a type for combined ids, fix #653

24 files changed, 301 insertions, 366 deletions

diff --git a/api/graphql/gen_graphql.go b/api/graphql/gen_graphql.go
deleted file mode 100644
index 19c5f1e3..00000000
--- a/api/graphql/gen_graphql.go
+++ /dev/null
@@ -1,33 +0,0 @@
-//go:build ignore
-
-package main
-
-import (
-	"fmt"
-	"io/ioutil"
-	"log"
-	"os"
-
-	"github.com/99designs/gqlgen/api"
-	"github.com/99designs/gqlgen/codegen/config"
-	"github.com/pkg/errors"
-)
-
-func main() {
-	fmt.Println("Generating graphql code ...")
-
-	log.SetOutput(ioutil.Discard)
-
-	cfg, err := config.LoadConfigFromDefaultLocations()
-	if os.IsNotExist(errors.Cause(err)) {
-		cfg = config.DefaultConfig()
-	} else if err != nil {
-		_, _ = fmt.Fprintln(os.Stderr, err.Error())
-		os.Exit(2)
-	}
-
-	if err = api.Generate(cfg); err != nil {
-		_, _ = fmt.Fprintln(os.Stderr, err.Error())
-		os.Exit(3)
-	}
-}
diff --git a/api/graphql/gqlgen.yml b/api/graphql/gqlgen.yml
index fbb46db6..98d31a5c 100644
--- a/api/graphql/gqlgen.yml
+++ b/api/graphql/gqlgen.yml
@@ -6,17 +6,18 @@ exec:
 model:
   filename: models/gen_models.go
 
-skip_mod_tidy: true
-
 autobind:
   - "github.com/MichaelMure/git-bug/api/graphql/models"
   - "github.com/MichaelMure/git-bug/repository"
+  - "github.com/MichaelMure/git-bug/entity"
   - "github.com/MichaelMure/git-bug/entity/dag"
   - "github.com/MichaelMure/git-bug/entities/common"
   - "github.com/MichaelMure/git-bug/entities/bug"
   - "github.com/MichaelMure/git-bug/entities/identity"
 
 models:
+  ID:
+    model: github.com/MichaelMure/git-bug/entity.Id
   Bug:
     model: github.com/MichaelMure/git-bug/api/graphql/models.BugWrapper
   Color:
diff --git a/api/graphql/graph/bug.generated.go b/api/graphql/graph/bug.generated.go
index 67af1933..ab9c6c34 100644
--- a/api/graphql/graph/bug.generated.go
+++ b/api/graphql/graph/bug.generated.go
@@ -15,6 +15,7 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
 	"github.com/MichaelMure/git-bug/entities/common"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/repository"
 	"github.com/vektah/gqlparser/v2/ast"
 )
@@ -22,7 +23,6 @@ import (
 // region    ************************** generated!.gotpl **************************
 
 type BugResolver interface {
-	ID(ctx context.Context, obj models.BugWrapper) (string, error)
 	HumanID(ctx context.Context, obj models.BugWrapper) (string, error)
 
 	Actors(ctx context.Context, obj models.BugWrapper, after *string, before *string, first *int, last *int) (*models.IdentityConnection, error)
@@ -32,6 +32,7 @@ type BugResolver interface {
 	Operations(ctx context.Context, obj models.BugWrapper, after *string, before *string, first *int, last *int) (*models.OperationConnection, error)
 }
 type CommentResolver interface {
+	ID(ctx context.Context, obj *bug.Comment) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.Comment) (models.IdentityWrapper, error)
 }
 
@@ -271,7 +272,7 @@ func (ec *executionContext) _Bug_id(ctx context.Context, field graphql.Collected
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.Bug().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -283,9 +284,9 @@ func (ec *executionContext) _Bug_id(ctx context.Context, field graphql.Collected
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_Bug_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -293,9 +294,9 @@ func (ec *executionContext) fieldContext_Bug_id(ctx context.Context, field graph
 		Object:     "Bug",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1294,6 +1295,50 @@ func (ec *executionContext) fieldContext_BugEdge_node(ctx context.Context, field
 	return fc, nil
 }
 
+func (ec *executionContext) _Comment_id(ctx context.Context, field graphql.CollectedField, obj *bug.Comment) (ret graphql.Marshaler) {
+	fc, err := ec.fieldContext_Comment_id(ctx, field)
+	if err != nil {
+		return graphql.Null
+	}
+	ctx = graphql.WithFieldContext(ctx, fc)
+	defer func() {
+		if r := recover(); r != nil {
+			ec.Error(ctx, ec.Recover(ctx, r))
+			ret = graphql.Null
+		}
+	}()
+	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
+		ctx = rctx // use context from middleware stack in children
+		return ec.resolvers.Comment().ID(rctx, obj)
+	})
+	if err != nil {
+		ec.Error(ctx, err)
+		return graphql.Null
+	}
+	if resTmp == nil {
+		if !graphql.HasFieldError(ctx, fc) {
+			ec.Errorf(ctx, "must not be null")
+		}
+		return graphql.Null
+	}
+	res := resTmp.(entity.CombinedId)
+	fc.Result = res
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
+}
+
+func (ec *executionContext) fieldContext_Comment_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
+	fc = &graphql.FieldContext{
+		Object:     "Comment",
+		Field:      field,
+		IsMethod:   true,
+		IsResolver: true,
+		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
+			return nil, errors.New("field of type CombinedId does not have child fields")
+		},
+	}
+	return fc, nil
+}
+
 func (ec *executionContext) _Comment_author(ctx context.Context, field graphql.CollectedField, obj *bug.Comment) (ret graphql.Marshaler) {
 	fc, err := ec.fieldContext_Comment_author(ctx, field)
 	if err != nil {
@@ -1533,6 +1578,8 @@ func (ec *executionContext) fieldContext_CommentConnection_nodes(ctx context.Con
 		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
 			switch field.Name {
+			case "id":
+				return ec.fieldContext_Comment_id(ctx, field)
 			case "author":
 				return ec.fieldContext_Comment_author(ctx, field)
 			case "message":
@@ -1727,6 +1774,8 @@ func (ec *executionContext) fieldContext_CommentEdge_node(ctx context.Context, f
 		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
 			switch field.Name {
+			case "id":
+				return ec.fieldContext_Comment_id(ctx, field)
 			case "author":
 				return ec.fieldContext_Comment_author(ctx, field)
 			case "message":
@@ -1763,25 +1812,12 @@ func (ec *executionContext) _Bug(ctx context.Context, sel ast.SelectionSet, obj
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("Bug")
 		case "id":
-			field := field
 
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._Bug_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
-
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._Bug_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "humanId":
 			field := field
 
@@ -2049,6 +2085,26 @@ func (ec *executionContext) _Comment(ctx context.Context, sel ast.SelectionSet,
 		switch field.Name {
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("Comment")
+		case "id":
+			field := field
+
+			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
+				defer func() {
+					if r := recover(); r != nil {
+						ec.Error(ctx, ec.Recover(ctx, r))
+					}
+				}()
+				res = ec._Comment_id(ctx, field, obj)
+				if res == graphql.Null {
+					atomic.AddUint32(&invalids, 1)
+				}
+				return res
+			}
+
+			out.Concurrently(i, func() graphql.Marshaler {
+				return innerFunc(ctx)
+
+			})
 		case "author":
 			field := field
 
diff --git a/api/graphql/graph/identity.generated.go b/api/graphql/graph/identity.generated.go
index 7fa9b9f0..51aa188b 100644
--- a/api/graphql/graph/identity.generated.go
+++ b/api/graphql/graph/identity.generated.go
@@ -12,13 +12,13 @@ import (
 
 	"github.com/99designs/gqlgen/graphql"
 	"github.com/MichaelMure/git-bug/api/graphql/models"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/vektah/gqlparser/v2/ast"
 )
 
 // region    ************************** generated!.gotpl **************************
 
 type IdentityResolver interface {
-	ID(ctx context.Context, obj models.IdentityWrapper) (string, error)
 	HumanID(ctx context.Context, obj models.IdentityWrapper) (string, error)
 }
 
@@ -48,7 +48,7 @@ func (ec *executionContext) _Identity_id(ctx context.Context, field graphql.Coll
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.Identity().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -60,9 +60,9 @@ func (ec *executionContext) _Identity_id(ctx context.Context, field graphql.Coll
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_Identity_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -70,9 +70,9 @@ func (ec *executionContext) fieldContext_Identity_id(ctx context.Context, field
 		Object:     "Identity",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -713,25 +713,12 @@ func (ec *executionContext) _Identity(ctx context.Context, sel ast.SelectionSet,
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("Identity")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._Identity_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._Identity_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "humanId":
 			field := field
 
diff --git a/api/graphql/graph/mutations.generated.go b/api/graphql/graph/mutations.generated.go
index 9d5df56e..11604d11 100644
--- a/api/graphql/graph/mutations.generated.go
+++ b/api/graphql/graph/mutations.generated.go
@@ -2097,7 +2097,7 @@ func (ec *executionContext) unmarshalInputEditCommentInput(ctx context.Context,
 		asMap[k] = v
 	}
 
-	fieldsInOrder := [...]string{"clientMutationId", "repoRef", "prefix", "target", "message", "files"}
+	fieldsInOrder := [...]string{"clientMutationId", "repoRef", "targetPrefix", "message", "files"}
 	for _, k := range fieldsInOrder {
 		v, ok := asMap[k]
 		if !ok {
@@ -2120,19 +2120,11 @@ func (ec *executionContext) unmarshalInputEditCommentInput(ctx context.Context,
 			if err != nil {
 				return it, err
 			}
-		case "prefix":
-			var err error
-
-			ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("prefix"))
-			it.Prefix, err = ec.unmarshalNString2string(ctx, v)
-			if err != nil {
-				return it, err
-			}
-		case "target":
+		case "targetPrefix":
 			var err error
 
-			ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("target"))
-			it.Target, err = ec.unmarshalNString2string(ctx, v)
+			ctx := graphql.WithPathContext(ctx, graphql.NewPathWithField("targetPrefix"))
+			it.TargetPrefix, err = ec.unmarshalNString2string(ctx, v)
 			if err != nil {
 				return it, err
 			}
diff --git a/api/graphql/graph/operations.generated.go b/api/graphql/graph/operations.generated.go
index 39a216f4..cc3cd9b7 100644
--- a/api/graphql/graph/operations.generated.go
+++ b/api/graphql/graph/operations.generated.go
@@ -15,6 +15,7 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
 	"github.com/MichaelMure/git-bug/entities/common"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/entity/dag"
 	"github.com/MichaelMure/git-bug/repository"
 	"github.com/vektah/gqlparser/v2/ast"
@@ -23,33 +24,27 @@ import (
 // region    ************************** generated!.gotpl **************************
 
 type AddCommentOperationResolver interface {
-	ID(ctx context.Context, obj *bug.AddCommentOperation) (string, error)
 	Author(ctx context.Context, obj *bug.AddCommentOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.AddCommentOperation) (*time.Time, error)
 }
 type CreateOperationResolver interface {
-	ID(ctx context.Context, obj *bug.CreateOperation) (string, error)
 	Author(ctx context.Context, obj *bug.CreateOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.CreateOperation) (*time.Time, error)
 }
 type EditCommentOperationResolver interface {
-	ID(ctx context.Context, obj *bug.EditCommentOperation) (string, error)
 	Author(ctx context.Context, obj *bug.EditCommentOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.EditCommentOperation) (*time.Time, error)
 	Target(ctx context.Context, obj *bug.EditCommentOperation) (string, error)
 }
 type LabelChangeOperationResolver interface {
-	ID(ctx context.Context, obj *bug.LabelChangeOperation) (string, error)
 	Author(ctx context.Context, obj *bug.LabelChangeOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.LabelChangeOperation) (*time.Time, error)
 }
 type SetStatusOperationResolver interface {
-	ID(ctx context.Context, obj *bug.SetStatusOperation) (string, error)
 	Author(ctx context.Context, obj *bug.SetStatusOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.SetStatusOperation) (*time.Time, error)
 }
 type SetTitleOperationResolver interface {
-	ID(ctx context.Context, obj *bug.SetTitleOperation) (string, error)
 	Author(ctx context.Context, obj *bug.SetTitleOperation) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.SetTitleOperation) (*time.Time, error)
 }
@@ -80,7 +75,7 @@ func (ec *executionContext) _AddCommentOperation_id(ctx context.Context, field g
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.AddCommentOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -92,9 +87,9 @@ func (ec *executionContext) _AddCommentOperation_id(ctx context.Context, field g
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_AddCommentOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -102,9 +97,9 @@ func (ec *executionContext) fieldContext_AddCommentOperation_id(ctx context.Cont
 		Object:     "AddCommentOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -318,7 +313,7 @@ func (ec *executionContext) _CreateOperation_id(ctx context.Context, field graph
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.CreateOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -330,9 +325,9 @@ func (ec *executionContext) _CreateOperation_id(ctx context.Context, field graph
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_CreateOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -340,9 +335,9 @@ func (ec *executionContext) fieldContext_CreateOperation_id(ctx context.Context,
 		Object:     "CreateOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -600,7 +595,7 @@ func (ec *executionContext) _EditCommentOperation_id(ctx context.Context, field
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.EditCommentOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -612,9 +607,9 @@ func (ec *executionContext) _EditCommentOperation_id(ctx context.Context, field
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_EditCommentOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -622,9 +617,9 @@ func (ec *executionContext) fieldContext_EditCommentOperation_id(ctx context.Con
 		Object:     "EditCommentOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -882,7 +877,7 @@ func (ec *executionContext) _LabelChangeOperation_id(ctx context.Context, field
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.LabelChangeOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -894,9 +889,9 @@ func (ec *executionContext) _LabelChangeOperation_id(ctx context.Context, field
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_LabelChangeOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -904,9 +899,9 @@ func (ec *executionContext) fieldContext_LabelChangeOperation_id(ctx context.Con
 		Object:     "LabelChangeOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1412,7 +1407,7 @@ func (ec *executionContext) _SetStatusOperation_id(ctx context.Context, field gr
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.SetStatusOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -1424,9 +1419,9 @@ func (ec *executionContext) _SetStatusOperation_id(ctx context.Context, field gr
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_SetStatusOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -1434,9 +1429,9 @@ func (ec *executionContext) fieldContext_SetStatusOperation_id(ctx context.Conte
 		Object:     "SetStatusOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1606,7 +1601,7 @@ func (ec *executionContext) _SetTitleOperation_id(ctx context.Context, field gra
 	}()
 	resTmp, err := ec.ResolverMiddleware(ctx, func(rctx context.Context) (interface{}, error) {
 		ctx = rctx // use context from middleware stack in children
-		return ec.resolvers.SetTitleOperation().ID(rctx, obj)
+		return obj.Id(), nil
 	})
 	if err != nil {
 		ec.Error(ctx, err)
@@ -1618,9 +1613,9 @@ func (ec *executionContext) _SetTitleOperation_id(ctx context.Context, field gra
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.Id)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_SetTitleOperation_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -1628,9 +1623,9 @@ func (ec *executionContext) fieldContext_SetTitleOperation_id(ctx context.Contex
 		Object:     "SetTitleOperation",
 		Field:      field,
 		IsMethod:   true,
-		IsResolver: true,
+		IsResolver: false,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type ID does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1892,25 +1887,12 @@ func (ec *executionContext) _AddCommentOperation(ctx context.Context, sel ast.Se
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("AddCommentOperation")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._AddCommentOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._AddCommentOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
@@ -1987,25 +1969,12 @@ func (ec *executionContext) _CreateOperation(ctx context.Context, sel ast.Select
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("CreateOperation")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._CreateOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._CreateOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
@@ -2089,25 +2058,12 @@ func (ec *executionContext) _EditCommentOperation(ctx context.Context, sel ast.S
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("EditCommentOperation")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._EditCommentOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._EditCommentOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
@@ -2204,25 +2160,12 @@ func (ec *executionContext) _LabelChangeOperation(ctx context.Context, sel ast.S
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("LabelChangeOperation")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._LabelChangeOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._LabelChangeOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
@@ -2383,25 +2326,12 @@ func (ec *executionContext) _SetStatusOperation(ctx context.Context, sel ast.Sel
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("SetStatusOperation")
 		case "id":
-			field := field
-
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._SetStatusOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
 
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._SetStatusOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
@@ -2471,25 +2401,12 @@ func (ec *executionContext) _SetTitleOperation(ctx context.Context, sel ast.Sele
 		case "__typename":
 			out.Values[i] = graphql.MarshalString("SetTitleOperation")
 		case "id":
-			field := field
 
-			innerFunc := func(ctx context.Context) (res graphql.Marshaler) {
-				defer func() {
-					if r := recover(); r != nil {
-						ec.Error(ctx, ec.Recover(ctx, r))
-					}
-				}()
-				res = ec._SetTitleOperation_id(ctx, field, obj)
-				if res == graphql.Null {
-					atomic.AddUint32(&invalids, 1)
-				}
-				return res
-			}
-
-			out.Concurrently(i, func() graphql.Marshaler {
-				return innerFunc(ctx)
+			out.Values[i] = ec._SetTitleOperation_id(ctx, field, obj)
 
-			})
+			if out.Values[i] == graphql.Null {
+				atomic.AddUint32(&invalids, 1)
+			}
 		case "author":
 			field := field
 
diff --git a/api/graphql/graph/prelude.generated.go b/api/graphql/graph/prelude.generated.go
index 81978efa..3767b0cd 100644
--- a/api/graphql/graph/prelude.generated.go
+++ b/api/graphql/graph/prelude.generated.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/99designs/gqlgen/graphql"
 	"github.com/99designs/gqlgen/graphql/introspection"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/vektah/gqlparser/v2/ast"
 )
 
@@ -2172,6 +2173,16 @@ func (ec *executionContext) marshalNBoolean2bool(ctx context.Context, sel ast.Se
 	return res
 }
 
+func (ec *executionContext) unmarshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx context.Context, v interface{}) (entity.Id, error) {
+	var res entity.Id
+	err := res.UnmarshalGQL(v)
+	return res, graphql.ErrorOnPath(ctx, err)
+}
+
+func (ec *executionContext) marshalNID2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐId(ctx context.Context, sel ast.SelectionSet, v entity.Id) graphql.Marshaler {
+	return v
+}
+
 func (ec *executionContext) unmarshalNInt2int(ctx context.Context, v interface{}) (int, error) {
 	res, err := graphql.UnmarshalInt(v)
 	return res, graphql.ErrorOnPath(ctx, err)
diff --git a/api/graphql/graph/root_.generated.go b/api/graphql/graph/root_.generated.go
index 297fc6a2..a1434228 100644
--- a/api/graphql/graph/root_.generated.go
+++ b/api/graphql/graph/root_.generated.go
@@ -74,7 +74,7 @@ type ComplexityRoot struct {
 		Author  func(childComplexity int) int
 		Date    func(childComplexity int) int
 		Files   func(childComplexity int) int
-		ID      func(childComplexity int) int
+		Id      func(childComplexity int) int
 		Message func(childComplexity int) int
 	}
 
@@ -102,7 +102,7 @@ type ComplexityRoot struct {
 		Comments     func(childComplexity int, after *string, before *string, first *int, last *int) int
 		CreatedAt    func(childComplexity int) int
 		HumanID      func(childComplexity int) int
-		ID           func(childComplexity int) int
+		Id           func(childComplexity int) int
 		Labels       func(childComplexity int) int
 		LastEdit     func(childComplexity int) int
 		Operations   func(childComplexity int, after *string, before *string, first *int, last *int) int
@@ -146,6 +146,7 @@ type ComplexityRoot struct {
 	Comment struct {
 		Author  func(childComplexity int) int
 		Files   func(childComplexity int) int
+		ID      func(childComplexity int) int
 		Message func(childComplexity int) int
 	}
 
@@ -170,7 +171,7 @@ type ComplexityRoot struct {
 		Author  func(childComplexity int) int
 		Date    func(childComplexity int) int
 		Files   func(childComplexity int) int
-		ID      func(childComplexity int) int
+		Id      func(childComplexity int) int
 		Message func(childComplexity int) int
 		Title   func(childComplexity int) int
 	}
@@ -191,7 +192,7 @@ type ComplexityRoot struct {
 		Author  func(childComplexity int) int
 		Date    func(childComplexity int) int
 		Files   func(childComplexity int) int
-		ID      func(childComplexity int) int
+		Id      func(childComplexity int) int
 		Message func(childComplexity int) int
 		Target  func(childComplexity int) int
 	}
@@ -207,7 +208,7 @@ type ComplexityRoot struct {
 		DisplayName func(childComplexity int) int
 		Email       func(childComplexity int) int
 		HumanID     func(childComplexity int) int
-		ID          func(childComplexity int) int
+		Id          func(childComplexity int) int
 		IsProtected func(childComplexity int) int
 		Login       func(childComplexity int) int
 		Name        func(childComplexity int) int
@@ -234,7 +235,7 @@ type ComplexityRoot struct {
 		Added   func(childComplexity int) int
 		Author  func(childComplexity int) int
 		Date    func(childComplexity int) int
-		ID      func(childComplexity int) int
+		Id      func(childComplexity int) int
 		Removed func(childComplexity int) int
 	}
 
@@ -323,7 +324,7 @@ type ComplexityRoot struct {
 	SetStatusOperation struct {
 		Author func(childComplexity int) int
 		Date   func(childComplexity int) int
-		ID     func(childComplexity int) int
+		Id     func(childComplexity int) int
 		Status func(childComplexity int) int
 	}
 
@@ -337,7 +338,7 @@ type ComplexityRoot struct {
 	SetTitleOperation struct {
 		Author func(childComplexity int) int
 		Date   func(childComplexity int) int
-		ID     func(childComplexity int) int
+		Id     func(childComplexity int) int
 		Title  func(childComplexity int) int
 		Was    func(childComplexity int) int
 	}
@@ -462,11 +463,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.AddCommentOperation.Files(childComplexity), true
 
 	case "AddCommentOperation.id":
-		if e.complexity.AddCommentOperation.ID == nil {
+		if e.complexity.AddCommentOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.AddCommentOperation.ID(childComplexity), true
+		return e.complexity.AddCommentOperation.Id(childComplexity), true
 
 	case "AddCommentOperation.message":
 		if e.complexity.AddCommentOperation.Message == nil {
@@ -605,11 +606,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.Bug.HumanID(childComplexity), true
 
 	case "Bug.id":
-		if e.complexity.Bug.ID == nil {
+		if e.complexity.Bug.Id == nil {
 			break
 		}
 
-		return e.complexity.Bug.ID(childComplexity), true
+		return e.complexity.Bug.Id(childComplexity), true
 
 	case "Bug.labels":
 		if e.complexity.Bug.Labels == nil {
@@ -801,6 +802,13 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 
 		return e.complexity.Comment.Files(childComplexity), true
 
+	case "Comment.id":
+		if e.complexity.Comment.ID == nil {
+			break
+		}
+
+		return e.complexity.Comment.ID(childComplexity), true
+
 	case "Comment.message":
 		if e.complexity.Comment.Message == nil {
 			break
@@ -886,11 +894,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.CreateOperation.Files(childComplexity), true
 
 	case "CreateOperation.id":
-		if e.complexity.CreateOperation.ID == nil {
+		if e.complexity.CreateOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.CreateOperation.ID(childComplexity), true
+		return e.complexity.CreateOperation.Id(childComplexity), true
 
 	case "CreateOperation.message":
 		if e.complexity.CreateOperation.Message == nil {
@@ -991,11 +999,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.EditCommentOperation.Files(childComplexity), true
 
 	case "EditCommentOperation.id":
-		if e.complexity.EditCommentOperation.ID == nil {
+		if e.complexity.EditCommentOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.EditCommentOperation.ID(childComplexity), true
+		return e.complexity.EditCommentOperation.Id(childComplexity), true
 
 	case "EditCommentOperation.message":
 		if e.complexity.EditCommentOperation.Message == nil {
@@ -1061,11 +1069,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.Identity.HumanID(childComplexity), true
 
 	case "Identity.id":
-		if e.complexity.Identity.ID == nil {
+		if e.complexity.Identity.Id == nil {
 			break
 		}
 
-		return e.complexity.Identity.ID(childComplexity), true
+		return e.complexity.Identity.Id(childComplexity), true
 
 	case "Identity.isProtected":
 		if e.complexity.Identity.IsProtected == nil {
@@ -1166,11 +1174,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.LabelChangeOperation.Date(childComplexity), true
 
 	case "LabelChangeOperation.id":
-		if e.complexity.LabelChangeOperation.ID == nil {
+		if e.complexity.LabelChangeOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.LabelChangeOperation.ID(childComplexity), true
+		return e.complexity.LabelChangeOperation.Id(childComplexity), true
 
 	case "LabelChangeOperation.removed":
 		if e.complexity.LabelChangeOperation.Removed == nil {
@@ -1591,11 +1599,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.SetStatusOperation.Date(childComplexity), true
 
 	case "SetStatusOperation.id":
-		if e.complexity.SetStatusOperation.ID == nil {
+		if e.complexity.SetStatusOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.SetStatusOperation.ID(childComplexity), true
+		return e.complexity.SetStatusOperation.Id(childComplexity), true
 
 	case "SetStatusOperation.status":
 		if e.complexity.SetStatusOperation.Status == nil {
@@ -1647,11 +1655,11 @@ func (e *executableSchema) Complexity(typeName, field string, childComplexity in
 		return e.complexity.SetTitleOperation.Date(childComplexity), true
 
 	case "SetTitleOperation.id":
-		if e.complexity.SetTitleOperation.ID == nil {
+		if e.complexity.SetTitleOperation.Id == nil {
 			break
 		}
 
-		return e.complexity.SetTitleOperation.ID(childComplexity), true
+		return e.complexity.SetTitleOperation.Id(childComplexity), true
 
 	case "SetTitleOperation.title":
 		if e.complexity.SetTitleOperation.Title == nil {
@@ -1844,6 +1852,8 @@ func (ec *executionContext) introspectType(name string) (*introspection.Type, er
 var sources = []*ast.Source{
 	{Name: "../schema/bug.graphql", Input: `"""Represents a comment on a bug."""
 type Comment implements Authored {
+  id: CombinedId!
+
   """The author of this comment."""
   author: Identity!
 
@@ -1873,7 +1883,7 @@ enum Status {
 
 type Bug implements Authored {
   """The identifier for this bug"""
-  id: String!
+  id: ID!
   """The human version (truncated) identifier for this bug"""
   humanId: String!
   status: Status!
@@ -1964,7 +1974,7 @@ type BugEdge {
 	{Name: "../schema/identity.graphql", Input: `"""Represents an identity"""
 type Identity {
     """The identifier for this identity"""
-    id: String!
+    id: ID!
     """The human version (truncated) identifier for this identity"""
     humanId: String!
     """The name of the person, if known."""
@@ -2109,10 +2119,8 @@ input EditCommentInput {
     clientMutationId: String
     """The name of the repository. If not set, the default repository is used."""
     repoRef: String
-    """The bug ID's prefix."""
-    prefix: String!
-    """The ID of the comment to be changed."""
-    target: String!
+    """A prefix of the CombinedId of the comment to be changed."""
+    targetPrefix: String!
     """The new message to be set."""
     message: String!
     """The collection of file's hash required for the first message."""
@@ -2226,7 +2234,7 @@ type SetTitlePayload {
 	{Name: "../schema/operations.graphql", Input: `"""An operation applied to a bug."""
 interface Operation {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The operations author."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2253,7 +2261,7 @@ type OperationEdge {
 
 type CreateOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2266,7 +2274,7 @@ type CreateOperation implements Operation & Authored {
 
 type SetTitleOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2278,7 +2286,7 @@ type SetTitleOperation implements Operation & Authored {
 
 type AddCommentOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2290,7 +2298,7 @@ type AddCommentOperation implements Operation & Authored {
 
 type EditCommentOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2303,7 +2311,7 @@ type EditCommentOperation implements Operation & Authored {
 
 type SetStatusOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2314,7 +2322,7 @@ type SetStatusOperation implements Operation & Authored {
 
 type LabelChangeOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -2404,7 +2412,7 @@ type Mutation {
 	{Name: "../schema/timeline.graphql", Input: `"""An item in the timeline of events"""
 interface TimelineItem {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
 }
 
 """CommentHistoryStep hold one version of a message in the history"""
@@ -2434,7 +2442,7 @@ type TimelineItemEdge {
 """CreateTimelineItem is a TimelineItem that represent the creation of a bug and its message edition history"""
 type CreateTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     message: String!
     messageIsEmpty: Boolean!
@@ -2448,7 +2456,7 @@ type CreateTimelineItem implements TimelineItem & Authored {
 """AddCommentTimelineItem is a TimelineItem that represent a Comment and its edition history"""
 type AddCommentTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     message: String!
     messageIsEmpty: Boolean!
@@ -2462,7 +2470,7 @@ type AddCommentTimelineItem implements TimelineItem & Authored {
 """LabelChangeTimelineItem is a TimelineItem that represent a change in the labels of a bug"""
 type LabelChangeTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     added: [Label!]!
@@ -2472,7 +2480,7 @@ type LabelChangeTimelineItem implements TimelineItem & Authored {
 """SetStatusTimelineItem is a TimelineItem that represent a change in the status of a bug"""
 type SetStatusTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     status: Status!
@@ -2481,14 +2489,15 @@ type SetStatusTimelineItem implements TimelineItem & Authored {
 """LabelChangeTimelineItem is a TimelineItem that represent a change in the title of a bug"""
 type SetTitleTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     title: String!
     was: String!
 }
 `, BuiltIn: false},
-	{Name: "../schema/types.graphql", Input: `scalar Time
+	{Name: "../schema/types.graphql", Input: `scalar CombinedId
+scalar Time
 scalar Hash
 
 """Defines a color by red, green and blue components."""
diff --git a/api/graphql/graph/timeline.generated.go b/api/graphql/graph/timeline.generated.go
index 9ad32e0b..4833e274 100644
--- a/api/graphql/graph/timeline.generated.go
+++ b/api/graphql/graph/timeline.generated.go
@@ -15,6 +15,7 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
 	"github.com/MichaelMure/git-bug/entities/common"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/repository"
 	"github.com/vektah/gqlparser/v2/ast"
 )
@@ -22,7 +23,7 @@ import (
 // region    ************************** generated!.gotpl **************************
 
 type AddCommentTimelineItemResolver interface {
-	ID(ctx context.Context, obj *bug.AddCommentTimelineItem) (string, error)
+	ID(ctx context.Context, obj *bug.AddCommentTimelineItem) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.AddCommentTimelineItem) (models.IdentityWrapper, error)
 
 	CreatedAt(ctx context.Context, obj *bug.AddCommentTimelineItem) (*time.Time, error)
@@ -32,24 +33,24 @@ type CommentHistoryStepResolver interface {
 	Date(ctx context.Context, obj *bug.CommentHistoryStep) (*time.Time, error)
 }
 type CreateTimelineItemResolver interface {
-	ID(ctx context.Context, obj *bug.CreateTimelineItem) (string, error)
+	ID(ctx context.Context, obj *bug.CreateTimelineItem) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.CreateTimelineItem) (models.IdentityWrapper, error)
 
 	CreatedAt(ctx context.Context, obj *bug.CreateTimelineItem) (*time.Time, error)
 	LastEdit(ctx context.Context, obj *bug.CreateTimelineItem) (*time.Time, error)
 }
 type LabelChangeTimelineItemResolver interface {
-	ID(ctx context.Context, obj *bug.LabelChangeTimelineItem) (string, error)
+	ID(ctx context.Context, obj *bug.LabelChangeTimelineItem) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.LabelChangeTimelineItem) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.LabelChangeTimelineItem) (*time.Time, error)
 }
 type SetStatusTimelineItemResolver interface {
-	ID(ctx context.Context, obj *bug.SetStatusTimelineItem) (string, error)
+	ID(ctx context.Context, obj *bug.SetStatusTimelineItem) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.SetStatusTimelineItem) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.SetStatusTimelineItem) (*time.Time, error)
 }
 type SetTitleTimelineItemResolver interface {
-	ID(ctx context.Context, obj *bug.SetTitleTimelineItem) (string, error)
+	ID(ctx context.Context, obj *bug.SetTitleTimelineItem) (entity.CombinedId, error)
 	Author(ctx context.Context, obj *bug.SetTitleTimelineItem) (models.IdentityWrapper, error)
 	Date(ctx context.Context, obj *bug.SetTitleTimelineItem) (*time.Time, error)
 }
@@ -92,9 +93,9 @@ func (ec *executionContext) _AddCommentTimelineItem_id(ctx context.Context, fiel
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.CombinedId)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_AddCommentTimelineItem_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -104,7 +105,7 @@ func (ec *executionContext) fieldContext_AddCommentTimelineItem_id(ctx context.C
 		IsMethod:   true,
 		IsResolver: true,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type CombinedId does not have child fields")
 		},
 	}
 	return fc, nil
@@ -600,9 +601,9 @@ func (ec *executionContext) _CreateTimelineItem_id(ctx context.Context, field gr
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.CombinedId)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_CreateTimelineItem_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -612,7 +613,7 @@ func (ec *executionContext) fieldContext_CreateTimelineItem_id(ctx context.Conte
 		IsMethod:   true,
 		IsResolver: true,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type CombinedId does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1020,9 +1021,9 @@ func (ec *executionContext) _LabelChangeTimelineItem_id(ctx context.Context, fie
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.CombinedId)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_LabelChangeTimelineItem_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -1032,7 +1033,7 @@ func (ec *executionContext) fieldContext_LabelChangeTimelineItem_id(ctx context.
 		IsMethod:   true,
 		IsResolver: true,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type CombinedId does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1270,9 +1271,9 @@ func (ec *executionContext) _SetStatusTimelineItem_id(ctx context.Context, field
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.CombinedId)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_SetStatusTimelineItem_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -1282,7 +1283,7 @@ func (ec *executionContext) fieldContext_SetStatusTimelineItem_id(ctx context.Co
 		IsMethod:   true,
 		IsResolver: true,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type CombinedId does not have child fields")
 		},
 	}
 	return fc, nil
@@ -1464,9 +1465,9 @@ func (ec *executionContext) _SetTitleTimelineItem_id(ctx context.Context, field
 		}
 		return graphql.Null
 	}
-	res := resTmp.(string)
+	res := resTmp.(entity.CombinedId)
 	fc.Result = res
-	return ec.marshalNString2string(ctx, field.Selections, res)
+	return ec.marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx, field.Selections, res)
 }
 
 func (ec *executionContext) fieldContext_SetTitleTimelineItem_id(ctx context.Context, field graphql.CollectedField) (fc *graphql.FieldContext, err error) {
@@ -1476,7 +1477,7 @@ func (ec *executionContext) fieldContext_SetTitleTimelineItem_id(ctx context.Con
 		IsMethod:   true,
 		IsResolver: true,
 		Child: func(ctx context.Context, field graphql.CollectedField) (*graphql.FieldContext, error) {
-			return nil, errors.New("field of type String does not have child fields")
+			return nil, errors.New("field of type CombinedId does not have child fields")
 		},
 	}
 	return fc, nil
diff --git a/api/graphql/graph/types.generated.go b/api/graphql/graph/types.generated.go
index 9095c7ac..b75604ab 100644
--- a/api/graphql/graph/types.generated.go
+++ b/api/graphql/graph/types.generated.go
@@ -14,6 +14,7 @@ import (
 	"github.com/99designs/gqlgen/graphql"
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
+	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/repository"
 	"github.com/vektah/gqlparser/v2/ast"
 )
@@ -410,22 +411,16 @@ func (ec *executionContext) _Authored(ctx context.Context, sel ast.SelectionSet,
 			return graphql.Null
 		}
 		return ec._AddCommentTimelineItem(ctx, sel, obj)
-	case bug.LabelChangeTimelineItem:
-		return ec._LabelChangeTimelineItem(ctx, sel, &obj)
 	case *bug.LabelChangeTimelineItem:
 		if obj == nil {
 			return graphql.Null
 		}
 		return ec._LabelChangeTimelineItem(ctx, sel, obj)
-	case bug.SetStatusTimelineItem:
-		return ec._SetStatusTimelineItem(ctx, sel, &obj)
 	case *bug.SetStatusTimelineItem:
 		if obj == nil {
 			return graphql.Null
 		}
 		return ec._SetStatusTimelineItem(ctx, sel, obj)
-	case bug.SetTitleTimelineItem:
-		return ec._SetTitleTimelineItem(ctx, sel, &obj)
 	case *bug.SetTitleTimelineItem:
 		if obj == nil {
 			return graphql.Null
@@ -588,6 +583,16 @@ func (ec *executionContext) marshalNColor2ᚖimageᚋcolorᚐRGBA(ctx context.Co
 	return ec._Color(ctx, sel, v)
 }
 
+func (ec *executionContext) unmarshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx context.Context, v interface{}) (entity.CombinedId, error) {
+	var res entity.CombinedId
+	err := res.UnmarshalGQL(v)
+	return res, graphql.ErrorOnPath(ctx, err)
+}
+
+func (ec *executionContext) marshalNCombinedId2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋentityᚐCombinedId(ctx context.Context, sel ast.SelectionSet, v entity.CombinedId) graphql.Marshaler {
+	return v
+}
+
 func (ec *executionContext) unmarshalNHash2githubᚗcomᚋMichaelMureᚋgitᚑbugᚋrepositoryᚐHash(ctx context.Context, v interface{}) (repository.Hash, error) {
 	var res repository.Hash
 	err := res.UnmarshalGQL(v)
diff --git a/api/graphql/handler.go b/api/graphql/handler.go
index 03dc32e9..00141f01 100644
--- a/api/graphql/handler.go
+++ b/api/graphql/handler.go
@@ -1,4 +1,4 @@
-//go:generate go run gen_graphql.go
+//go:generate go run github.com/99designs/gqlgen generate
 
 // Package graphql contains the root GraphQL http handler
 package graphql
diff --git a/api/graphql/models/gen_models.go b/api/graphql/models/gen_models.go
index c4e40cba..d75b3d27 100644
--- a/api/graphql/models/gen_models.go
+++ b/api/graphql/models/gen_models.go
@@ -161,10 +161,8 @@ type EditCommentInput struct {
 	ClientMutationID *string `json:"clientMutationId"`
 	// The name of the repository. If not set, the default repository is used.
 	RepoRef *string `json:"repoRef"`
-	// The bug ID's prefix.
-	Prefix string `json:"prefix"`
-	// The ID of the comment to be changed.
-	Target string `json:"target"`
+	// A prefix of the CombinedId of the comment to be changed.
+	TargetPrefix string `json:"targetPrefix"`
 	// The new message to be set.
 	Message string `json:"message"`
 	// The collection of file's hash required for the first message.
diff --git a/api/graphql/resolvers/bug.go b/api/graphql/resolvers/bug.go
index d17a4469..c40949fa 100644
--- a/api/graphql/resolvers/bug.go
+++ b/api/graphql/resolvers/bug.go
@@ -14,10 +14,6 @@ var _ graph.BugResolver = &bugResolver{}
 
 type bugResolver struct{}
 
-func (bugResolver) ID(_ context.Context, obj models.BugWrapper) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (bugResolver) HumanID(_ context.Context, obj models.BugWrapper) (string, error) {
 	return obj.Id().Human(), nil
 }
diff --git a/api/graphql/resolvers/comment.go b/api/graphql/resolvers/comment.go
index 78548156..7dddc3c8 100644
--- a/api/graphql/resolvers/comment.go
+++ b/api/graphql/resolvers/comment.go
@@ -6,12 +6,17 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/graph"
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
+	"github.com/MichaelMure/git-bug/entity"
 )
 
 var _ graph.CommentResolver = &commentResolver{}
 
 type commentResolver struct{}
 
+func (c commentResolver) ID(ctx context.Context, obj *bug.Comment) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
+}
+
 func (c commentResolver) Author(_ context.Context, obj *bug.Comment) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author), nil
 }
diff --git a/api/graphql/resolvers/mutation.go b/api/graphql/resolvers/mutation.go
index 6ad81db4..f6296d63 100644
--- a/api/graphql/resolvers/mutation.go
+++ b/api/graphql/resolvers/mutation.go
@@ -9,7 +9,6 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/cache"
 	"github.com/MichaelMure/git-bug/entities/bug"
-	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/util/text"
 )
 
@@ -177,7 +176,12 @@ func (r mutationResolver) AddCommentAndReopen(ctx context.Context, input models.
 }
 
 func (r mutationResolver) EditComment(ctx context.Context, input models.EditCommentInput) (*models.EditCommentPayload, error) {
-	repo, b, err := r.getBug(input.RepoRef, input.Prefix)
+	repo, err := r.getRepo(input.RepoRef)
+	if err != nil {
+		return nil, err
+	}
+
+	b, target, err := repo.ResolveComment(input.TargetPrefix)
 	if err != nil {
 		return nil, err
 	}
@@ -190,7 +194,7 @@ func (r mutationResolver) EditComment(ctx context.Context, input models.EditComm
 	op, err := b.EditCommentRaw(
 		author,
 		time.Now().Unix(),
-		entity.Id(input.Target),
+		target,
 		text.Cleanup(input.Message),
 		nil,
 	)
diff --git a/api/graphql/resolvers/operations.go b/api/graphql/resolvers/operations.go
index 53c3c0bc..91194213 100644
--- a/api/graphql/resolvers/operations.go
+++ b/api/graphql/resolvers/operations.go
@@ -13,10 +13,6 @@ var _ graph.CreateOperationResolver = createOperationResolver{}
 
 type createOperationResolver struct{}
 
-func (createOperationResolver) ID(_ context.Context, obj *bug.CreateOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (createOperationResolver) Author(_ context.Context, obj *bug.CreateOperation) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author()), nil
 }
@@ -30,10 +26,6 @@ var _ graph.AddCommentOperationResolver = addCommentOperationResolver{}
 
 type addCommentOperationResolver struct{}
 
-func (addCommentOperationResolver) ID(_ context.Context, obj *bug.AddCommentOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (addCommentOperationResolver) Author(_ context.Context, obj *bug.AddCommentOperation) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author()), nil
 }
@@ -47,10 +39,6 @@ var _ graph.EditCommentOperationResolver = editCommentOperationResolver{}
 
 type editCommentOperationResolver struct{}
 
-func (editCommentOperationResolver) ID(_ context.Context, obj *bug.EditCommentOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (editCommentOperationResolver) Target(_ context.Context, obj *bug.EditCommentOperation) (string, error) {
 	return obj.Target.String(), nil
 }
@@ -68,10 +56,6 @@ var _ graph.LabelChangeOperationResolver = labelChangeOperationResolver{}
 
 type labelChangeOperationResolver struct{}
 
-func (labelChangeOperationResolver) ID(_ context.Context, obj *bug.LabelChangeOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (labelChangeOperationResolver) Author(_ context.Context, obj *bug.LabelChangeOperation) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author()), nil
 }
@@ -85,10 +69,6 @@ var _ graph.SetStatusOperationResolver = setStatusOperationResolver{}
 
 type setStatusOperationResolver struct{}
 
-func (setStatusOperationResolver) ID(_ context.Context, obj *bug.SetStatusOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (setStatusOperationResolver) Author(_ context.Context, obj *bug.SetStatusOperation) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author()), nil
 }
@@ -102,10 +82,6 @@ var _ graph.SetTitleOperationResolver = setTitleOperationResolver{}
 
 type setTitleOperationResolver struct{}
 
-func (setTitleOperationResolver) ID(_ context.Context, obj *bug.SetTitleOperation) (string, error) {
-	return obj.Id().String(), nil
-}
-
 func (setTitleOperationResolver) Author(_ context.Context, obj *bug.SetTitleOperation) (models.IdentityWrapper, error) {
 	return models.NewLoadedIdentity(obj.Author()), nil
 }
diff --git a/api/graphql/resolvers/timeline.go b/api/graphql/resolvers/timeline.go
index 2481784e..2d691173 100644
--- a/api/graphql/resolvers/timeline.go
+++ b/api/graphql/resolvers/timeline.go
@@ -7,6 +7,7 @@ import (
 	"github.com/MichaelMure/git-bug/api/graphql/graph"
 	"github.com/MichaelMure/git-bug/api/graphql/models"
 	"github.com/MichaelMure/git-bug/entities/bug"
+	"github.com/MichaelMure/git-bug/entity"
 )
 
 var _ graph.CommentHistoryStepResolver = commentHistoryStepResolver{}
@@ -22,8 +23,8 @@ var _ graph.AddCommentTimelineItemResolver = addCommentTimelineItemResolver{}
 
 type addCommentTimelineItemResolver struct{}
 
-func (addCommentTimelineItemResolver) ID(_ context.Context, obj *bug.AddCommentTimelineItem) (string, error) {
-	return obj.Id().String(), nil
+func (addCommentTimelineItemResolver) ID(_ context.Context, obj *bug.AddCommentTimelineItem) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
 }
 
 func (addCommentTimelineItemResolver) Author(_ context.Context, obj *bug.AddCommentTimelineItem) (models.IdentityWrapper, error) {
@@ -44,8 +45,8 @@ var _ graph.CreateTimelineItemResolver = createTimelineItemResolver{}
 
 type createTimelineItemResolver struct{}
 
-func (createTimelineItemResolver) ID(_ context.Context, obj *bug.CreateTimelineItem) (string, error) {
-	return obj.Id().String(), nil
+func (createTimelineItemResolver) ID(_ context.Context, obj *bug.CreateTimelineItem) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
 }
 
 func (r createTimelineItemResolver) Author(_ context.Context, obj *bug.CreateTimelineItem) (models.IdentityWrapper, error) {
@@ -66,8 +67,8 @@ var _ graph.LabelChangeTimelineItemResolver = labelChangeTimelineItem{}
 
 type labelChangeTimelineItem struct{}
 
-func (labelChangeTimelineItem) ID(_ context.Context, obj *bug.LabelChangeTimelineItem) (string, error) {
-	return obj.Id().String(), nil
+func (labelChangeTimelineItem) ID(_ context.Context, obj *bug.LabelChangeTimelineItem) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
 }
 
 func (i labelChangeTimelineItem) Author(_ context.Context, obj *bug.LabelChangeTimelineItem) (models.IdentityWrapper, error) {
@@ -83,8 +84,8 @@ var _ graph.SetStatusTimelineItemResolver = setStatusTimelineItem{}
 
 type setStatusTimelineItem struct{}
 
-func (setStatusTimelineItem) ID(_ context.Context, obj *bug.SetStatusTimelineItem) (string, error) {
-	return obj.Id().String(), nil
+func (setStatusTimelineItem) ID(_ context.Context, obj *bug.SetStatusTimelineItem) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
 }
 
 func (i setStatusTimelineItem) Author(_ context.Context, obj *bug.SetStatusTimelineItem) (models.IdentityWrapper, error) {
@@ -100,8 +101,8 @@ var _ graph.SetTitleTimelineItemResolver = setTitleTimelineItem{}
 
 type setTitleTimelineItem struct{}
 
-func (setTitleTimelineItem) ID(_ context.Context, obj *bug.SetTitleTimelineItem) (string, error) {
-	return obj.Id().String(), nil
+func (setTitleTimelineItem) ID(_ context.Context, obj *bug.SetTitleTimelineItem) (entity.CombinedId, error) {
+	return obj.CombinedId(), nil
 }
 
 func (i setTitleTimelineItem) Author(_ context.Context, obj *bug.SetTitleTimelineItem) (models.IdentityWrapper, error) {
diff --git a/api/graphql/schema/bug.graphql b/api/graphql/schema/bug.graphql
index 03aa95b8..17d3a897 100644
--- a/api/graphql/schema/bug.graphql
+++ b/api/graphql/schema/bug.graphql
@@ -1,5 +1,7 @@
 """Represents a comment on a bug."""
 type Comment implements Authored {
+  id: CombinedId!
+
   """The author of this comment."""
   author: Identity!
 
@@ -29,7 +31,7 @@ enum Status {
 
 type Bug implements Authored {
   """The identifier for this bug"""
-  id: String!
+  id: ID!
   """The human version (truncated) identifier for this bug"""
   humanId: String!
   status: Status!
diff --git a/api/graphql/schema/identity.graphql b/api/graphql/schema/identity.graphql
index 93154a90..c910ea55 100644
--- a/api/graphql/schema/identity.graphql
+++ b/api/graphql/schema/identity.graphql
@@ -1,7 +1,7 @@
 """Represents an identity"""
 type Identity {
     """The identifier for this identity"""
-    id: String!
+    id: ID!
     """The human version (truncated) identifier for this identity"""
     humanId: String!
     """The name of the person, if known."""
diff --git a/api/graphql/schema/mutations.graphql b/api/graphql/schema/mutations.graphql
index 078dc214..be6a0115 100644
--- a/api/graphql/schema/mutations.graphql
+++ b/api/graphql/schema/mutations.graphql
@@ -95,10 +95,8 @@ input EditCommentInput {
     clientMutationId: String
     """The name of the repository. If not set, the default repository is used."""
     repoRef: String
-    """The bug ID's prefix."""
-    prefix: String!
-    """The ID of the comment to be changed."""
-    target: String!
+    """A prefix of the CombinedId of the comment to be changed."""
+    targetPrefix: String!
     """The new message to be set."""
     message: String!
     """The collection of file's hash required for the first message."""
diff --git a/api/graphql/schema/operations.graphql b/api/graphql/schema/operations.graphql
index 18e0929c..8e198753 100644
--- a/api/graphql/schema/operations.graphql
+++ b/api/graphql/schema/operations.graphql
@@ -1,7 +1,7 @@
 """An operation applied to a bug."""
 interface Operation {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The operations author."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -28,7 +28,7 @@ type OperationEdge {
 
 type CreateOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -41,7 +41,7 @@ type CreateOperation implements Operation & Authored {
 
 type SetTitleOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -53,7 +53,7 @@ type SetTitleOperation implements Operation & Authored {
 
 type AddCommentOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -65,7 +65,7 @@ type AddCommentOperation implements Operation & Authored {
 
 type EditCommentOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -78,7 +78,7 @@ type EditCommentOperation implements Operation & Authored {
 
 type SetStatusOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
@@ -89,7 +89,7 @@ type SetStatusOperation implements Operation & Authored {
 
 type LabelChangeOperation implements Operation & Authored {
     """The identifier of the operation"""
-    id: String!
+    id: ID!
     """The author of this object."""
     author: Identity!
     """The datetime when this operation was issued."""
diff --git a/api/graphql/schema/timeline.graphql b/api/graphql/schema/timeline.graphql
index 12462aa3..b7ab5ca8 100644
--- a/api/graphql/schema/timeline.graphql
+++ b/api/graphql/schema/timeline.graphql
@@ -1,7 +1,7 @@
 """An item in the timeline of events"""
 interface TimelineItem {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
 }
 
 """CommentHistoryStep hold one version of a message in the history"""
@@ -31,7 +31,7 @@ type TimelineItemEdge {
 """CreateTimelineItem is a TimelineItem that represent the creation of a bug and its message edition history"""
 type CreateTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     message: String!
     messageIsEmpty: Boolean!
@@ -45,7 +45,7 @@ type CreateTimelineItem implements TimelineItem & Authored {
 """AddCommentTimelineItem is a TimelineItem that represent a Comment and its edition history"""
 type AddCommentTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     message: String!
     messageIsEmpty: Boolean!
@@ -59,7 +59,7 @@ type AddCommentTimelineItem implements TimelineItem & Authored {
 """LabelChangeTimelineItem is a TimelineItem that represent a change in the labels of a bug"""
 type LabelChangeTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     added: [Label!]!
@@ -69,7 +69,7 @@ type LabelChangeTimelineItem implements TimelineItem & Authored {
 """SetStatusTimelineItem is a TimelineItem that represent a change in the status of a bug"""
 type SetStatusTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     status: Status!
@@ -78,7 +78,7 @@ type SetStatusTimelineItem implements TimelineItem & Authored {
 """LabelChangeTimelineItem is a TimelineItem that represent a change in the title of a bug"""
 type SetTitleTimelineItem implements TimelineItem & Authored {
     """The identifier of the source operation"""
-    id: String!
+    id: CombinedId!
     author: Identity!
     date: Time!
     title: String!
diff --git a/api/graphql/schema/types.graphql b/api/graphql/schema/types.graphql
index 0182885e..f4284b2d 100644
--- a/api/graphql/schema/types.graphql
+++ b/api/graphql/schema/types.graphql
@@ -1,3 +1,4 @@
+scalar CombinedId
 scalar Time
 scalar Hash
 
diff --git a/api/graphql/tools.go b/api/graphql/tools.go
new file mode 100644
index 00000000..863672ec
--- /dev/null
+++ b/api/graphql/tools.go
@@ -0,0 +1,8 @@
+//go:build tools
+// +build tools
+
+package graphql
+
+import (
+	_ "github.com/99designs/gqlgen"
+)