[SOLVED] Can't log QSqlError

[SevenPJ]

Hi,

I'm new to Qt and c++.
I'm using Qt4.8.1 and eclipse.

I want to post some data to a database table, but I get an error on execute.
To solve this I need to print out the error message.
But when I build my project I get the following error:
src\alarmdatabase.cpp:201:11: error: invalid use of incomplete type 'struct QDebug'
c:\Qt\qt.4.8.1-32\Desktop\Qt\4.8.1\mingw\include/QtCore/qglobal.h:1762:7: error: forward declaration of 'struct QDebug'
src\alarmdatabase.cpp:201:32: error: invalid use of incomplete type 'struct QSqlError'
c:\Qt\qt.4.8.1-32\Desktop\Qt\4.8.1\mingw\include\QtSql/qsqldatabase.h:57:7: error: forward declaration of 'struct QSqlError'
c:\Qt\qt.4.8.1-32\Desktop\Qt\4.8.1\mingw\include/QtCore/qglobal.h: At global scope:
c:\Qt\qt.4.8.1-32\Desktop\Qt\4.8.1\mingw\include/QtCore/qglobal.h:1765:29: warning: inline function 'QDebug qDebug()' used but never defined [enabled by default]

My code is:
@bool AlarmDatabase::addAlarm(const QUuid& userId, const QUuid &alarmId, const QUuid &alarmerId, const QString &name, const QDateTime &alarmTime, const QString &location, const QString &gpsLink) {
QSqlQuery query(mDb);
QSqlRecord record = alarmstorage::record(userId, alarmId, alarmerId, name, alarmTime, location, gpsLink);
QString sql = alarmstorage::insert(mDb.driver(), record);
if (!query.exec(sql)) {
qDebug() << query.lastError();
return false;
} else
return true;
}@

What is wrong?

// Seven

[guziemic]

Probably this error is caused by missing include

@
#include <QDebug>
@

[SevenPJ]

Oh, sorry I missed that.
Added
@#include <QDebug>@

But now I get the folowing error:
src\alarmdatabase.cpp:202:32: error: invalid use of incomplete type 'struct QSqlError'
c:\Qt\qt.4.8.1-32\Desktop\Qt\4.8.1\mingw\include\QtSql/qsqldatabase.h:57:7: error: forward declaration of 'struct QSqlError'

[Rahul Das]

@#include <QSqlError>
#include <QDebug>@

Add this. And make sure you have
@Qt += sql@ in your pro file.

[JKSH]

Look at your error messages closely and try to understand them; they can help you figure out what's wrong. Both times, your compiler said you have incomplete type:

src\alarmdatabase.cpp:201:11: error: invalid use of incomplete type ‘struct QDebug’
src\alarmdatabase.cpp:201:32: error: invalid use of incomplete type ‘struct QSqlError’

Incomplete type means that the headers are missing. So, #include the relevant header to fix it.

[SevenPJ]

Thank's now it works

[Rahul Das]

Please edit the topic as 'Solved', if it is solved. :)