Database class



  • Hi I am trying to use QSqlDatabase, but I am getting build errors and QTCreator doesn't seem to know that QSqlDatabase exists? The IDE is not even auto-completing my typing, etc.

    Running build steps for project app13_sqlite3...
    Configuration unchanged, skipping qmake step.
    Starting: "/usr/bin/make" -w
    make: Entering directory `/home/yadav/dev/cpp/QT_Samples/app13_sqlite3-build-desktop'
    g++ -c -pipe -g -Wall -W -D_REENTRANT -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I../app13_sqlite3 -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -I../app13_sqlite3 -I. -o dialog.o ../app13_sqlite3/dialog.cpp
    ../app13_sqlite3/dialog.cpp:4: fatal error: QSqlDatabase: No such file or directory
    compilation terminated.



  • Try to add
    @
    QT += sql
    @
    to your project file



  • still getting the same error, btw where do i add that? to the project setting -> build steps -> additional arguments ??

    also I can't even navigate to QSqlDatabase.h ? using follow symbol under cursor from the IDE, is there something wrong. should this not work with a default SDK install



  • ok i figured it out, I needed to

    #include <QtSql/QSqlDatabase>
    rather than
    #include <QSqlDatabase>



  • You have .pro file in your project tree. Just add stuff I've said you there and all will be ok.



  • thanks again, that helped me figure out where to also add the linker stuff so my exe would run without an error

    LIBS += -lsqlite3



  • You don't need to add that lib. It is already linked against the Qt SQLite plugin.



  • Andre thanks, didn't know that, removed the explicit linkage.


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