• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

func (User) Fields() []ent.Field {
	return []ent.Field{
		field.UUID("id", uuid.UUID{}).
			Unique().
			Immutable().
			Default(uuid.New). // This works
			Annotations(entproto.Field(1)),
		field.String("name").
			DefaultFunc(randstr). // This not work.
			Annotations(entproto.Field(2)),

		field.Time("created_at").
			Immutable().
			Default(time.Now). // This not work.
			Annotations(entproto.Field(2)),
	}
}

This happens because generated code (func (x *XService) createBuilder) calls m.SetXXX(v) even if v is the zero value.

Expected Behavior 🤔

Fucntion given by DefaultFunc or Default must be invoked and the result must be set as a field value.

Steps to Reproduce 🕹

Steps:

1. Genreate gRPC services with Create RPC.
2. Call Create.

Your Environment 🌎