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  4. do i have to delete query object pointer?
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do i have to delete query object pointer?

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  • SGaistS SGaist

    Hi,

    Yes, you have to.

    However, if you re-read the API making use of QSqlQuery, you'll see none of them uses objects allocated in the heap.

    U Offline
    U Offline
    user4592357
    wrote on last edited by
    #3

    @sgaist
    okay, in that case i guess i'll store just a member object.

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #4

      Why do you need to store that query as member variable ?

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

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      • SGaistS SGaist

        Why do you need to store that query as member variable ?

        U Offline
        U Offline
        user4592357
        wrote on last edited by
        #5

        @sgaist
        well i'm creating and executing the query in a data source class (for table view), then each colomn takes the query from the data source and gets appropriate value from it.

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #6

          Then you should rather keep the string of the query and build the QSqlQuery object when you actually need it.

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

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          • SGaistS SGaist

            Then you should rather keep the string of the query and build the QSqlQuery object when you actually need it.

            U Offline
            U Offline
            user4592357
            wrote on last edited by
            #7

            @sgaist
            then how will the columns get the results?

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #8

              Can you share the code you are using ?
              It looks like you could make use of a QSqlQueryModel.

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

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              • SGaistS SGaist

                Can you share the code you are using ?
                It looks like you could make use of a QSqlQueryModel.

                U Offline
                U Offline
                user4592357
                wrote on last edited by user4592357
                #9

                @sgaist
                no i'm on mobile now, and soon to sleep. will take a look at it tomorrow and see if i can use it. thanks

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                • U user4592357

                  @sgaist
                  no i'm on mobile now, and soon to sleep. will take a look at it tomorrow and see if i can use it. thanks

                  U Offline
                  U Offline
                  user4592357
                  wrote on last edited by
                  #10

                  @SGaist
                  i took a look at QSqlQueryModel but i guess i can't use it because my table view already has a model.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    What kind ?

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

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                    • SGaistS SGaist

                      What kind ?

                      U Offline
                      U Offline
                      user4592357
                      wrote on last edited by
                      #12

                      @sgaist
                      it is QAbstractTableModel

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #13

                        You can replace your model unless you are doing something special with it ?

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

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                        • SGaistS SGaist

                          You can replace your model unless you are doing something special with it ?

                          U Offline
                          U Offline
                          user4592357
                          wrote on last edited by
                          #14

                          @sgaist
                          that's the thing. i can't replace it cause it's doing a lot of things (it's part of a library someone has created and I'm using it)

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #15

                            How are you using it since you need to query a database ?

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

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                            • SGaistS SGaist

                              How are you using it since you need to query a database ?

                              U Offline
                              U Offline
                              user4592357
                              wrote on last edited by
                              #16

                              @sgaist
                              it has some long logic built into it, it sets up a lot of connections etc.

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