[SQL] MySQL error codes
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Hi!
I'm writing a simple application that connects to database. Everything works fine but there's one thing that I can't solve myself.
Let say that I have a query like that:
@
QSqlQuery query("UPDATE table SET id=3 WHERE name='name'")
@This table already has record with id=3 (id is primary key) and mysql returns with code:
@
#1062 - Duplicate entry '3' for key 'PRIMARY'
@Hovewer, when I execute this query by:
@
if (!query.exec())
QMessageBox::warning(this, "Database error", QString::number(db.lastError().number()));
@I get -1 instead of error code (db.lastError().text() is empty, too). Any ideas what's wrong? How can I get mysql error code after query failed? I need to know what was the reason of the error in order to (for example) inform user about it.
Thanks in advance.
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I think I can answer myself :)
Instead of
@db.lastError().number()@ should be @query.lastError().number()@
db (QSqlDatabase) refers probably to whole database and that's why it doesn't return error codes of unsuccessful executed queries.
Topic can be closed.
