package validator
import (
"github.com/vektah/gqlparser/ast"
. "github.com/vektah/gqlparser/validator"
)
func init() {
AddRule("KnownArgumentNames", func(observers *Events, addError AddErrFunc) {
// A GraphQL field is only valid if all supplied arguments are defined by that field.
observers.OnField(func(walker *Walker, field *ast.Field) {
if field.Definition == nil || field.ObjectDefinition == nil {
return
}
for _, arg := range field.Arguments {
def := field.Definition.Arguments.ForName(arg.Name)
if def != nil {
continue
}
var suggestions []string
for _, argDef := range field.Definition.Arguments {
suggestions = append(suggestions, argDef.Name)
}
addError(
Message(`Unknown argument "%s" on field "%s" of type "%s".`, arg.Name, field.Name, field.ObjectDefinition.Name),
SuggestListQuoted("Did you mean", arg.Name, suggestions),
At(field.Position),
)
}
})
observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
if directive.Definition == nil {
return
}
for _, arg := range directive.Arguments {
def := directive.Definition.Arguments.ForName(arg.Name)
if def != nil {
continue
}
var suggestions []string
for _, argDef := range directive.Definition.Arguments {
suggestions = append(suggestions, argDef.Name)
}
addError(
Message(`Unknown argument "%s" on directive "@%s".`, arg.Name, directive.Name),
SuggestListQuoted("Did you mean", arg.Name, suggestions),
At(directive.Position),
)
}
})
})
}