GORM 原始 sql 未执行

Question

I have a simple UPDATE SQL statement that I am trying to execute:

if err := gormDB.Raw("UPDATE orders SET item_id = ? WHERE client_id = ?", "item1", "client1").Error; err != nil {
    return err
}

No errors are being returned, but my query is seemingly not being executed on the database. Nothing is logged, and no database changes are persisted.

Answer 1

Calling Raw by itself does not execute the query. One way to execute the operation and to retrieve the results is using the Rows() method:

if _, err := gormDB.Raw("UPDATE orders SET item_id = ? WHERE client_id = ?", "item1", "client1").Rows(); err != nil {
    return err
}
// Parse rows...

In my case however, I did not need to access the returned result, so I opted to use the Exec method, which immediately executes the given SQL:

if err := gormDB.Exec("UPDATE orders SET item_id = ? WHERE client_id = ?", "item1", "client1").Error; err != nil {
    return err
}

Answer 2

1. gormDB.Raw() will return (tx *DB), it would not execute, generally, it use to query.
2. use directly gormDB.exec()