refactor: change creating trigger API

gormschema/gorm.go

@@ -36,6 +36,9 @@ type (
 		isTriggerOption()
 		apply(*schemaBuilder)
 	}
+	Trigger struct {
+		opts []TriggerOption
+	}
 	// ViewDefiner defines a view.
 	ViewDefiner interface {
 		ViewDef(dialect string) []ViewOption
@@ -77,6 +80,10 @@ func New(dialect string, opts ...Option) *Loader {
 	return l
 }
 
+func NewTrigger(opts ...TriggerOption) Trigger {
+	return Trigger{opts: opts}
+}
+
 func (s schemaOption) apply(b *schemaBuilder) {
 	s(b)
 }
@@ -364,14 +371,14 @@ func (m *migrator) orderModels(models ...any) ([]any, error) {
 func (m *migrator) CreateTriggers(models []any) error {
 	for _, model := range models {
 		if md, ok := model.(interface {
-			Triggers(string) [][]TriggerOption
+			Triggers(string) []Trigger
 		}); ok {
-			for _, options := range md.Triggers(m.Dialector.Name()) {
+			for _, trigger := range md.Triggers(m.Dialector.Name()) {
 				schemaBuilder := &schemaBuilder{
 					db: m.DB,
 				}
-				for _, option := range options {
-					option.apply(schemaBuilder)
+				for _, opt := range trigger.opts {
+					opt.apply(schemaBuilder)
 					if err := m.DB.Exec(schemaBuilder.createStmt).Error; err != nil {
 						return err
 					}

gormschema/gorm_test.go

@@ -20,7 +20,6 @@ func TestSQLiteConfig(t *testing.T) {
 		models.WorkingAgedUsers{},
 		models.Pet{},
 		models.UserPetHistory{},
-		models.User{},
 		ckmodels.Event{},
 		ckmodels.Location{},
 		models.TopPetOwner{},

gormschema/testdata/mysql_deterministic_output

@@ -2,8 +2,22 @@ CREATE TABLE `hobbies` (`id` bigint unsigned AUTO_INCREMENT,`name` longtext,PRIM
 CREATE TABLE `users` (`id` bigint unsigned AUTO_INCREMENT,`created_at` datetime(3) NULL,`updated_at` datetime(3) NULL,`deleted_at` datetime(3) NULL,`name` longtext,`age` bigint,PRIMARY KEY (`id`),INDEX `idx_users_deleted_at` (`deleted_at`));
 CREATE TABLE `user_hobbies` (`user_id` bigint unsigned,`hobby_id` bigint unsigned,PRIMARY KEY (`user_id`,`hobby_id`));
 CREATE TABLE `pets` (`id` bigint unsigned AUTO_INCREMENT,`created_at` datetime(3) NULL,`updated_at` datetime(3) NULL,`deleted_at` datetime(3) NULL,`name` longtext,`user_id` bigint unsigned,PRIMARY KEY (`id`),INDEX `idx_pets_deleted_at` (`deleted_at`));
+CREATE TABLE `user_pet_histories` (`user_id` bigint unsigned,`pet_id` bigint unsigned,`created_at` datetime(3) NULL,PRIMARY KEY (`user_id`,`pet_id`));
 CREATE VIEW top_pet_owners AS SELECT user_id, COUNT(id) AS pet_count FROM pets GROUP BY user_id ORDER BY pet_count DESC LIMIT 10;
 CREATE VIEW working_aged_users AS SELECT name, age FROM `users` WHERE age BETWEEN 18 AND 65;
+CREATE TRIGGER trg_insert_user_pet_history
+AFTER INSERT ON pets
+FOR EACH ROW
+BEGIN
+	INSERT INTO user_pet_histories (user_id, pet_id, created_at)
+	VALUES (NEW.user_id, NEW.id, NOW(3));
+END;
+CREATE TRIGGER trg_adding_heart_on_pet 
+BEFORE INSERT ON pets 
+FOR EACH ROW
+BEGIN
+	SET NEW.name = CONCAT(NEW.name, ' ❤️');
+END;
 ALTER TABLE `user_hobbies` ADD CONSTRAINT `fk_user_hobbies_hobby` FOREIGN KEY (`hobby_id`) REFERENCES `hobbies`(`id`);
 ALTER TABLE `user_hobbies` ADD CONSTRAINT `fk_user_hobbies_user` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`);
 ALTER TABLE `pets` ADD CONSTRAINT `fk_users_pets` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`);

gormschema/testdata/sqlite_no_fk

@@ -3,6 +3,8 @@ CREATE TABLE `users` (`id` integer,`created_at` datetime,`updated_at` datetime,`
 CREATE INDEX `idx_users_deleted_at` ON `users`(`deleted_at`);
 CREATE TABLE `pets` (`id` integer,`created_at` datetime,`updated_at` datetime,`deleted_at` datetime,`name` text,`user_id` integer,PRIMARY KEY (`id`));
 CREATE INDEX `idx_pets_deleted_at` ON `pets`(`deleted_at`);
+CREATE TABLE `hobbies` (`id` integer,`name` text,PRIMARY KEY (`id`));
+CREATE TABLE `user_hobbies` (`hobby_id` integer,`user_id` integer,PRIMARY KEY (`hobby_id`,`user_id`));
 CREATE TRIGGER trg_insert_user_pet_history
 AFTER INSERT ON pets
 BEGIN

internal/testdata/models/pet.go

@@ -41,7 +41,7 @@ type UserPetHistory struct {
 	CreatedAt time.Time
 }
 
-func (Pet) Triggers(dialect string) [][]gormschema.TriggerOption {
+func (Pet) Triggers(dialect string) []gormschema.Trigger {
 	var stmt1, stmt2 string
 	switch dialect {
 	case "mysql":
@@ -126,8 +126,8 @@ BEGIN
 END`
 	}
 
-	return [][]gormschema.TriggerOption{
-		[]gormschema.TriggerOption{gormschema.CreateStmt(stmt1)},
-		[]gormschema.TriggerOption{gormschema.CreateStmt(stmt2)},
+	return []gormschema.Trigger{
+		gormschema.NewTrigger(gormschema.CreateStmt(stmt1)),
+		gormschema.NewTrigger(gormschema.CreateStmt(stmt2)),
 	}
 }