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|
package validator
import (
"fmt"
"github.com/vektah/gqlparser/ast"
. "github.com/vektah/gqlparser/validator"
)
func init() {
AddRule("ValuesOfCorrectType", func(observers *Events, addError AddErrFunc) {
observers.OnValue(func(walker *Walker, value *ast.Value) {
if value.Definition == nil || value.ExpectedType == nil {
return
}
if value.Definition.Kind == ast.Scalar {
// Skip custom validating scalars
if !value.Definition.OneOf("Int", "Float", "String", "Boolean", "ID") {
return
}
}
var possibleEnums []string
if value.Definition.Kind == ast.Enum {
for _, val := range value.Definition.EnumValues {
possibleEnums = append(possibleEnums, val.Name)
}
}
rawVal, err := value.Value(nil)
if err != nil {
unexpectedTypeMessage(addError, value)
}
switch value.Kind {
case ast.NullValue:
if value.ExpectedType.NonNull {
unexpectedTypeMessage(addError, value)
}
case ast.ListValue:
if value.ExpectedType.Elem == nil {
unexpectedTypeMessage(addError, value)
return
}
case ast.IntValue:
if !value.Definition.OneOf("Int", "Float", "ID") {
unexpectedTypeMessage(addError, value)
}
case ast.FloatValue:
if !value.Definition.OneOf("Float") {
unexpectedTypeMessage(addError, value)
}
case ast.StringValue, ast.BlockValue:
if value.Definition.Kind == ast.Enum {
rawValStr := fmt.Sprint(rawVal)
addError(
Message("Expected type %s, found %s.", value.ExpectedType.String(), value.String()),
SuggestListUnquoted("Did you mean the enum value", rawValStr, possibleEnums),
At(value.Position),
)
} else if !value.Definition.OneOf("String", "ID") {
unexpectedTypeMessage(addError, value)
}
case ast.EnumValue:
if value.Definition.Kind != ast.Enum || value.Definition.EnumValues.ForName(value.Raw) == nil {
rawValStr := fmt.Sprint(rawVal)
addError(
Message("Expected type %s, found %s.", value.ExpectedType.String(), value.String()),
SuggestListUnquoted("Did you mean the enum value", rawValStr, possibleEnums),
At(value.Position),
)
}
case ast.BooleanValue:
if !value.Definition.OneOf("Boolean") {
unexpectedTypeMessage(addError, value)
}
case ast.ObjectValue:
for _, field := range value.Definition.Fields {
if field.Type.NonNull {
fieldValue := value.Children.ForName(field.Name)
if fieldValue == nil && field.DefaultValue == nil {
addError(
Message("Field %s.%s of required type %s was not provided.", value.Definition.Name, field.Name, field.Type.String()),
At(value.Position),
)
continue
}
}
}
for _, fieldValue := range value.Children {
if value.Definition.Fields.ForName(fieldValue.Name) == nil {
var suggestions []string
for _, fieldValue := range value.Definition.Fields {
suggestions = append(suggestions, fieldValue.Name)
}
addError(
Message(`Field "%s" is not defined by type %s.`, fieldValue.Name, value.Definition.Name),
SuggestListUnquoted("Did you mean", fieldValue.Name, suggestions),
At(fieldValue.Position),
)
}
}
case ast.Variable:
return
default:
panic(fmt.Errorf("unhandled %T", value))
}
})
})
}
func unexpectedTypeMessage(addError AddErrFunc, v *ast.Value) {
addError(
Message("Expected type %s, found %s.", v.ExpectedType.String(), v.String()),
At(v.Position),
)
}
|
