Why is rollback not rolled back after the save () operation?

{Code...} the code above is not rolled back as expected. The data is inserted into the database. The native SQL is executed as follows, which is consistent with expectation! : {Code...} Does it mean I was wrong for 10 thousand years...

DB: beginTransaction (); $ model = new UserWechat (); $ model-> unionid = 'od13wwfnk64bq9me95s-bzuU7j8A '; $ model-> save (); DB :: rollback ();

The code above is not rolled back as expected and the data is inserted into the database.
Run the following native SQL statement as expected! :

Start transaction; insert into user_wechat (unionid) values ('od13wwfnk64bq9me95s-bzuU7j8A '); rollback;

Why am I wrong for 10 thousand years...

Reply content:

DB: beginTransaction (); $ model = new UserWechat (); $ model-> unionid = 'od13wwfnk64bq9me95s-bzuU7j8A '; $ model-> save (); DB :: rollback ();

The code above is not rolled back as expected and the data is inserted into the database.
Run the following native SQL statement as expected! :

Start transaction; insert into user_wechat (unionid) values ('od13wwfnk64bq9me95s-bzuU7j8A '); rollback;

Why am I wrong for 10 thousand years...

Is your database engine InnoDB? Transactions are supported only by InnoDB, and MyISAM does not!