Why did rollback not rollback after save () was executed?

DB::beginTransaction();$model = new UserWechat();$model->unionid = 'od13WwfNk64BQ9ME95S-bzuU7j8A';$model->save();DB::rollback();

The code is not rolled back as expected, and the data is inserted into the database.
Execute native SQL as follows, and expect the same!:

start transaction;insert into user_wechat (unionid) values('od13WwfNk64BQ9ME95S-bzuU7j8A');rollback;

Did I mistake for 10,000 years ...

Reply content:

DB::beginTransaction();$model = new UserWechat();$model->unionid = 'od13WwfNk64BQ9ME95S-bzuU7j8A';$model->save();DB::rollback();

The code is not rolled back as expected, and the data is inserted into the database.
Execute native SQL as follows, and expect the same!:

start transaction;insert into user_wechat (unionid) values('od13WwfNk64BQ9ME95S-bzuU7j8A');rollback;

Did I mistake for 10,000 years ...

Is your database engine InnoDB? Only InnoDB support the transaction, MyISAM is not supported Oh!

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