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cannot Excecute query in sql

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  • J JonnyQB

    @JonB
    after i fixed it i got the same thing

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by JonB
    #5

    @JonnyQB
    Start by printing out query.lastError() after executing statement, as @mrjj said. Almost anything could be the issue. You do not even say what message you get from your code, only "i just cant execute the query". There is also no message for Logindb.open() failing. We cannot guess.

    J 1 Reply Last reply
    0
    • JonBJ JonB

      @JonnyQB
      Start by printing out query.lastError() after executing statement, as @mrjj said. Almost anything could be the issue. You do not even say what message you get from your code, only "i just cant execute the query". There is also no message for Logindb.open() failing. We cannot guess.

      J Offline
      J Offline
      JonnyQB
      wrote on last edited by
      #6

      @JonB
      Error = "Driver not loaded Driver not loaded"
      now should i use another driver or what ?

      1 Reply Last reply
      0
      • J Offline
        J Offline
        JonnyQB
        wrote on last edited by
        #7

        @JonB
        both sqllite and mysql are not loaded

        1 Reply Last reply
        0
        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #8

          Hi,

          Start your application with QT_DEBUG_PLUGINS environment variable set to 1 so see what happens when the plugins are loaded.

          You can set that variable in the Run part of the Project panel.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          J JonBJ 2 Replies Last reply
          1
          • SGaistS SGaist

            Hi,

            Start your application with QT_DEBUG_PLUGINS environment variable set to 1 so see what happens when the plugins are loaded.

            You can set that variable in the Run part of the Project panel.

            J Offline
            J Offline
            JonnyQB
            wrote on last edited by
            #9

            @SGaist
            where should i set it it =1

            1 Reply Last reply
            0
            • SGaistS SGaist

              Hi,

              Start your application with QT_DEBUG_PLUGINS environment variable set to 1 so see what happens when the plugins are loaded.

              You can set that variable in the Run part of the Project panel.

              JonBJ Offline
              JonBJ Offline
              JonB
              wrote on last edited by
              #10

              @JonnyQB
              Did you see:

              @SGaist said in cannot Excecute query in sql:

              You can set that variable in the Run part of the Project panel.

              1 Reply Last reply
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              • J Offline
                J Offline
                JonnyQB
                wrote on last edited by JonnyQB
                #11

                @JonB
                @SGaist
                like so ?
                it changes nothing
                Unbenannt4.PNG

                JonBJ 1 Reply Last reply
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                • J JonnyQB

                  @JonB
                  @SGaist
                  like so ?
                  it changes nothing
                  Unbenannt4.PNG

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by JonB
                  #12

                  @JonnyQB
                  Please take the time to read @SGaist's post; it's also in the Qt documentation. You have not spelled the environment variable as he typed, you have not used copy & paste, so what do you expect to happen if you do not get that correct?

                  J 1 Reply Last reply
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                  • JonBJ JonB

                    @JonnyQB
                    Please take the time to read @SGaist's post; it's also in the Qt documentation. You have not spelled the environment variable as he typed, you have not used copy & paste, so what do you expect to happen if you do not get that correct?

                    J Offline
                    J Offline
                    JonnyQB
                    wrote on last edited by
                    #13

                    @JonB
                    i took time to read and figure it out but i couldnt find it because i think my qt is german soi dont know where to chage it exactly

                    JonBJ 1 Reply Last reply
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                    • J JonnyQB

                      @JonB
                      i took time to read and figure it out but i couldnt find it because i think my qt is german soi dont know where to chage it exactly

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by JonB
                      #14

                      @JonnyQB
                      To be clear: you are changing in the right place (I think!), but the name must be QT_DEBUG_PLUGINS, OK?

                      J 1 Reply Last reply
                      0
                      • JonBJ JonB

                        @JonnyQB
                        To be clear: you are changing in the right place (I think!), but the name must be QT_DEBUG_PLUGINS, OK?

                        J Offline
                        J Offline
                        JonnyQB
                        wrote on last edited by
                        #15

                        @JonB
                        i changed it and got Error = "Driver not loaded Driver not loaded" again

                        jsulmJ 1 Reply Last reply
                        0
                        • J JonnyQB

                          @JonB
                          i changed it and got Error = "Driver not loaded Driver not loaded" again

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #16

                          @JonnyQB With QT_DEBUG_PLUGINS set you should now get some additional output from the application. You have to check that output to see why the plug-in was not loaded (you can also post it here).

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          0
                          • J Offline
                            J Offline
                            JonnyQB
                            wrote on last edited by
                            #17

                            @JonB @jsulm

                            Unbenannt6.PNG

                            JonBJ 1 Reply Last reply
                            0
                            • J JonnyQB

                              @JonB @jsulm

                              Unbenannt6.PNG

                              JonBJ Offline
                              JonBJ Offline
                              JonB
                              wrote on last edited by
                              #18

                              @JonnyQB
                              We have said repeatedly what you need to set to get the debug output required in the replies above. Show us where you did what for that and we will look again....

                              1 Reply Last reply
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