func (db *DB) Debug() (tx *DB) {
	tx = db.getInstance()
	return tx.Session(&Session{
		Logger: db.Logger.LogMode(logger.Info),
	})
}

// Set store value with key into current db instance's context
func (db *DB) Set(key string, value interface{}) *DB {
	tx := db.getInstance()
	tx.Statement.Settings.Store(key, value)
	return tx
}

// Get get value with key from current db instance's context

			return assocDB.Updates(setMap).Error
		}
	case schema.BelongsTo:
		switch op.Type {
		case clause.OpDelete:
			return base.Transaction(func(tx *DB) error {
				assocDB.Statement.ConnPool = tx.Statement.ConnPool
				base.Statement.ConnPool = tx.Statement.ConnPool

				if err := assocDB.Where("? IN (?)", primaryColumns, base.Select(ownerFKNames)).Delete(assocModel).Error; err != nil {
					return err
				}

			}

			err = tx.Exec(createTableSQL, values...).Error
			return err
		}); err != nil {
			return err
		}
	}
	return nil
}

// DropTable drop table for values
func (m Migrator) DropTable(values ...interface{}) error {
	values = m.ReorderModels(values, false)
	for i := len(values) - 1; i >= 0; i-- {
		tx := m.DB.Session(&gorm.Session{})

	}

	var err error
	_ = DB.Migrator().DropTable(&RelationModel1{}, &RelationModel2{}, &RelationModel3{})

	tx := DB.Session(&gorm.Session{})
	tx.IgnoreRelationshipsWhenMigrating = true

	err = tx.AutoMigrate(&RelationModel3{})
	if err != nil {
		t.Errorf("AutoMigrate err:%v", err)
	}

	// RelationModel3 should be existed

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