Merge pull request #173 from vvakame/feat-resolver-hint

add resolver option support to field

codegen/config.go

@@ -29,6 +29,7 @@ type TypeMapEntry struct {
 }
 
 type TypeMapField struct {
+	Resolver bool `yaml:"resolver"`
 }
 
 func (c *PackageConfig) normalize() error {

codegen/object.go

@@ -22,13 +22,14 @@ type Object struct {
 type Field struct {
 	*Type
 
-	GQLName      string          // The name of the field in graphql
-	GoMethodName string          // The name of the method in go, if any
-	GoVarName    string          // The name of the var in go, if any
-	Args         []FieldArgument // A list of arguments to be passed to this field
-	NoErr        bool            // If this is bound to a go method, does that method have an error as the second argument
-	Object       *Object         // A link back to the parent object
-	Default      interface{}     // The default value
+	GQLName       string          // The name of the field in graphql
+	GoMethodName  string          // The name of the method in go, if any
+	GoVarName     string          // The name of the var in go, if any
+	Args          []FieldArgument // A list of arguments to be passed to this field
+	ForceResolver bool            // Should be emit Resolver method
+	NoErr         bool            // If this is bound to a go method, does that method have an error as the second argument
+	Object        *Object         // A link back to the parent object
+	Default       interface{}     // The default value
 }
 
 type FieldArgument struct {
@@ -60,7 +61,7 @@ func (o *Object) HasResolvers() bool {
 }
 
 func (f *Field) IsResolver() bool {
-	return f.GoMethodName == "" && f.GoVarName == ""
+	return f.ForceResolver || f.GoMethodName == "" && f.GoVarName == ""
 }
 
 func (f *Field) IsConcurrent() bool {

codegen/object_build.go

@@ -81,12 +81,21 @@ func sanitizeGoName(name string) string {
 
 func (cfg *Config) buildObject(types NamedTypes, typ *schema.Object) (*Object, error) {
 	obj := &Object{NamedType: types[typ.TypeName()]}
+	typeEntry, entryExists := cfg.Models[typ.TypeName()]
 
 	for _, i := range typ.Interfaces {
 		obj.Satisfies = append(obj.Satisfies, i.Name)
 	}
 
 	for _, field := range typ.Fields {
+
+		var forceResolver bool
+		if entryExists {
+			if typeField, ok := typeEntry.Fields[field.Name]; ok {
+				forceResolver = typeField.Resolver
+			}
+		}
+
 		var args []FieldArgument
 		for _, arg := range field.Args {
 			newArg := FieldArgument{
@@ -108,10 +117,11 @@ func (cfg *Config) buildObject(types NamedTypes, typ *schema.Object) (*Object, e
 		}
 
 		obj.Fields = append(obj.Fields, Field{
-			GQLName: field.Name,
-			Type:    types.getType(field.Type),
-			Args:    args,
-			Object:  obj,
+			GQLName:       field.Name,
+			Type:          types.getType(field.Type),
+			Args:          args,
+			Object:        obj,
+			ForceResolver: forceResolver,
 		})
 	}
 

test/.gqlgen.yml

@@ -14,3 +14,6 @@ models:
     model: github.com/vektah/gqlgen/test.Viewer
   User:
     model: remote_api.User
+    fields:
+      likes:
+        resolver: true

test/resolvers_test.go

@@ -106,7 +106,7 @@ func (r *testResolvers) Query_jsonEncoding(ctx context.Context) (string, error)
 
 func (r *testResolvers) Query_viewer(ctx context.Context) (*Viewer, error) {
 	return &Viewer{
-		User: &remote_api.User{"Bob"},
+		User: &remote_api.User{Name: "Bob"},
 	}, nil
 }
 
@@ -129,6 +129,10 @@ func (r *testResolvers) Element_error(ctx context.Context, obj *Element) (bool,
 	return false, r.err
 }
 
+func (r *testResolvers) User_likes(ctx context.Context, obj *remote_api.User) ([]string, error) {
+	return obj.Likes, nil
+}
+
 type specialErr struct{}
 
 func (*specialErr) Error() string {

test/schema.graphql

@@ -20,7 +20,9 @@ input DateFilter {
 
 type User {
     name: String
+    likes: [String]
 }
+
 type Viewer {
     user: User
 }

test/vendor/remote_api/user.go

@@ -1,5 +1,6 @@
 package remote_api
 
 type User struct {
-	Name string
+	Name  string
+	Likes []string
 }