entc/gen: move mutation hooks logic to a shared generic function (#3180)

entc/integration/ent/task_create.go

@@ -69,50 +69,8 @@ func (tc *TaskCreate) Mutation() *TaskMutation {
 
 // Save creates the Task in the database.
 func (tc *TaskCreate) Save(ctx context.Context) (*Task, error) {
-	var (
-		err  error
-		node *Task
-	)
 	tc.defaults()
-	if len(tc.hooks) == 0 {
-		if err = tc.check(); err != nil {
-			return nil, err
-		}
-		node, err = tc.sqlSave(ctx)
-	} else {
-		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
-			mutation, ok := m.(*TaskMutation)
-			if !ok {
-				return nil, fmt.Errorf("unexpected mutation type %T", m)
-			}
-			if err = tc.check(); err != nil {
-				return nil, err
-			}
-			tc.mutation = mutation
-			if node, err = tc.sqlSave(ctx); err != nil {
-				return nil, err
-			}
-			mutation.id = &node.ID
-			mutation.done = true
-			return node, err
-		})
-		for i := len(tc.hooks) - 1; i >= 0; i-- {
-			if tc.hooks[i] == nil {
-				return nil, fmt.Errorf("ent: uninitialized hook (forgotten import ent/runtime?)")
-			}
-			mut = tc.hooks[i](mut)
-		}
-		v, err := mut.Mutate(ctx, tc.mutation)
-		if err != nil {
-			return nil, err
-		}
-		nv, ok := v.(*Task)
-		if !ok {
-			return nil, fmt.Errorf("unexpected node type %T returned from TaskMutation", v)
-		}
-		node = nv
-	}
-	return node, err
+	return withHooks[*Task, TaskMutation](ctx, tc.sqlSave, tc.mutation, tc.hooks)
 }
 
 // SaveX calls Save and panics if Save returns an error.
@@ -166,6 +124,9 @@ func (tc *TaskCreate) check() error {
 }
 
 func (tc *TaskCreate) sqlSave(ctx context.Context) (*Task, error) {
+	if err := tc.check(); err != nil {
+		return nil, err
+	}
 	_node, _spec := tc.createSpec()
 	if err := sqlgraph.CreateNode(ctx, tc.driver, _spec); err != nil {
 		if sqlgraph.IsConstraintError(err) {
@@ -175,6 +136,8 @@ func (tc *TaskCreate) sqlSave(ctx context.Context) (*Task, error) {
 	}
 	id := _spec.ID.Value.(int64)
 	_node.ID = int(id)
+	tc.mutation.id = &_node.ID
+	tc.mutation.done = true
 	return _node, nil
 }