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package validator
import (
"github.com/vektah/gqlparser/ast"
. "github.com/vektah/gqlparser/validator"
)
func init() {
AddRule("ProvidedRequiredArguments", func(observers *Events, addError AddErrFunc) {
observers.OnField(func(walker *Walker, field *ast.Field) {
if field.Definition == nil {
return
}
argDef:
for _, argDef := range field.Definition.Arguments {
if !argDef.Type.NonNull {
continue
}
if argDef.DefaultValue != nil {
continue
}
for _, arg := range field.Arguments {
if arg.Name == argDef.Name {
continue argDef
}
}
addError(
Message(`Field "%s" argument "%s" of type "%s" is required but not provided.`, field.Name, argDef.Name, argDef.Type.String()),
At(field.Position),
)
}
})
observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
if directive.Definition == nil {
return
}
argDef:
for _, argDef := range directive.Definition.Arguments {
if !argDef.Type.NonNull {
continue
}
if argDef.DefaultValue != nil {
continue
}
for _, arg := range directive.Arguments {
if arg.Name == argDef.Name {
continue argDef
}
}
addError(
Message(`Directive "@%s" argument "%s" of type "%s" is required but not provided.`, directive.Definition.Name, argDef.Name, argDef.Type.String()),
At(directive.Position),
)
}
})
})
}
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