framework/db/Migration.php
public function up()
    {
        $transaction = $this->db->beginTransaction();
        try {
            if ($this->safeUp() === false) {
                $transaction->rollBack();
                return false;
            }
            $transaction->commit();
        } catch (\Exception $e) {
            $this->printException($e);
            $transaction->rollBack();
            return false;
        } catch (\Throwable $e) {
            $this->printException($e);
            $transaction->rollBack();
            return false;
        }

        return null;
    }
public function up()
    {
        $transaction = $this->db->beginTransaction();
        try {
            if ($this->safeUp() === false) {
                $transaction->rollBack();
                return false;
            }
            $transaction->commit();
        } catch (\Exception $e) {
            $this->printException($e);
            $transaction->rollBack();
            return false;
        } catch (\Throwable $e) {
            $this->printException($e);
            $transaction->rollBack();
            return false;
        }

        return null;
    }
public function up ( ) { $ transaction = $ this -> db -> beginTransaction ( ) ; try { if ( $ this -> safeUp ( ) === false ) { $ transaction -> rollBack ( ) ; return false ; } $ transaction -> commit ( ) ; } catch ( \ Exception $ e ) { $ this -> printException ( $ e ) ; $ transaction -> rollBack ( ) ; return false ; } catch ( \ Throwable $ e ) { $ this -> printException ( $ e ) ; $ transaction -> rollBack ( ) ; return false ; } return null ; }
This method contains the logic to be executed when applying this migration.
Child classes may override this method to provide actual migration logic.
@return bool return a false value to indicate the migration fails
and should not proceed further. All other return values mean the migration succeeds.
This method contains the logic to be executed when applying this migration . Child classes may override this method to provide actual migration logic .