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QSqlRelationalTableModel with multiple Joins?

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  • JonBJ JonB

    @devhobby
    I'm a little lost. You wrote:

    Thanks but before doing that, I was wondering if there's a way to change the content of the cell by directly typing into it.

    I thought you were saying when double-click it does not let you edit, nothing happens, or whatever. Now I think you're saying it does let you edit? I don't know if you have a question here?

    devhobbyD Offline
    devhobbyD Offline
    devhobby
    wrote on last edited by devhobby
    #21

    @JonB said in QSqlRelationalTableModel with multiple Joins?:

    @devhobby
    I'm a little lost. You wrote:

    Thanks but before doing that, I was wondering if there's a way to change the content of the cell by directly typing into it.

    I thought you were saying when double-click it does not let you edit, nothing happens, or whatever. Now I think you're saying it does let you edit? I don't know if you have a question here?

    Yes I asked if there's a way to change the content of the cell by directly typing into it

    Because now, when I double click, nothing happens.

    Once the cell is edited, I'd also like to change its background color... but that's another story

    JonBJ 1 Reply Last reply
    0
    • devhobbyD devhobby

      @JonB said in QSqlRelationalTableModel with multiple Joins?:

      @devhobby
      I'm a little lost. You wrote:

      Thanks but before doing that, I was wondering if there's a way to change the content of the cell by directly typing into it.

      I thought you were saying when double-click it does not let you edit, nothing happens, or whatever. Now I think you're saying it does let you edit? I don't know if you have a question here?

      Yes I asked if there's a way to change the content of the cell by directly typing into it

      Because now, when I double click, nothing happens.

      Once the cell is edited, I'd also like to change its background color... but that's another story

      JonBJ Offline
      JonBJ Offline
      JonB
      wrote on last edited by
      #22

      @devhobby said in QSqlRelationalTableModel with multiple Joins?:

      Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString

      Because now, when I double click, nothing happens.

      Sorry, but if "nothing happens" when you double-click cell to edit, how come you talk about "Once the user changes the text of the cell"? Maybe I'm being dumb, but I just don't get it!

      devhobbyD 1 Reply Last reply
      1
      • JonBJ JonB

        @devhobby said in QSqlRelationalTableModel with multiple Joins?:

        Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString

        Because now, when I double click, nothing happens.

        Sorry, but if "nothing happens" when you double-click cell to edit, how come you talk about "Once the user changes the text of the cell"? Maybe I'm being dumb, but I just don't get it!

        devhobbyD Offline
        devhobbyD Offline
        devhobby
        wrote on last edited by
        #23

        @JonB said in QSqlRelationalTableModel with multiple Joins?:

        @devhobby said in QSqlRelationalTableModel with multiple Joins?:

        Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString

        Because now, when I double click, nothing happens.

        Sorry, but if "nothing happens" when you double-click cell to edit, how come you talk about "Once the user changes the text of the cell"? Maybe I'm being dumb, but I just don't get it!

        Don't worry! I'm sorry, I'm probably using the wrong tenses to express myself.

        "Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString"

        Is the prediction of what I want to happen... and can't manage to make it happen actually

        JonBJ 1 Reply Last reply
        1
        • devhobbyD devhobby

          @JonB said in QSqlRelationalTableModel with multiple Joins?:

          @devhobby said in QSqlRelationalTableModel with multiple Joins?:

          Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString

          Because now, when I double click, nothing happens.

          Sorry, but if "nothing happens" when you double-click cell to edit, how come you talk about "Once the user changes the text of the cell"? Maybe I'm being dumb, but I just don't get it!

          Don't worry! I'm sorry, I'm probably using the wrong tenses to express myself.

          "Once the user changes the text of the cell, the new text is immediately visible and I store it in a QString"

          Is the prediction of what I want to happen... and can't manage to make it happen actually

          JonBJ Offline
          JonBJ Offline
          JonB
          wrote on last edited by JonB
          #24

          @devhobby

          Is the prediction of what I want to happen... and can't manage to make it happen actually

          Ohhhh...! :)

          OK, I would expect you've done the right stuff. I believe that's what our code does. I can only think of what I suggested: that the SELECT makes the model read-only, and editing is not allowed.

          I shall step aside and you need an expert here to guide you further....

          devhobbyD 1 Reply Last reply
          1
          • JonBJ JonB

            @devhobby

            Is the prediction of what I want to happen... and can't manage to make it happen actually

            Ohhhh...! :)

            OK, I would expect you've done the right stuff. I believe that's what our code does. I can only think of what I suggested: that the SELECT makes the model read-only, and editing is not allowed.

            I shall step aside and you need an expert here to guide you further....

            devhobbyD Offline
            devhobbyD Offline
            devhobby
            wrote on last edited by devhobby
            #25

            @JonB said in QSqlRelationalTableModel with multiple Joins?:

            @devhobby

            Is the prediction of what I want to happen... and can't manage to make it happen actually

            Ohhhh...! :)

            OK, I would expect you've done the right stuff. I believe that's what our code does. I can only think of what I suggested: that the SELECT makes the model read-only, and editing is not allowed.

            I shall step aside and you need an expert here to guide you further....

            Yes, the custom query is most likely keeping my Table View read-only.

            I just want to visually edit the cells...

            This is far more complicated than I thought...

            JonBJ 1 Reply Last reply
            0
            • devhobbyD devhobby

              @JonB said in QSqlRelationalTableModel with multiple Joins?:

              @devhobby

              Is the prediction of what I want to happen... and can't manage to make it happen actually

              Ohhhh...! :)

              OK, I would expect you've done the right stuff. I believe that's what our code does. I can only think of what I suggested: that the SELECT makes the model read-only, and editing is not allowed.

              I shall step aside and you need an expert here to guide you further....

              Yes, the custom query is most likely keeping my Table View read-only.

              I just want to visually edit the cells...

              This is far more complicated than I thought...

              JonBJ Offline
              JonBJ Offline
              JonB
              wrote on last edited by JonB
              #26

              @devhobby
              http://doc.qt.io/qt-5/qitemdelegate.html#details must be to do with it.

              I could easily be wrong(!), but I thought the idea of the model/view would be that if you edit it would save the value back to the model, not "just give you some string". You can doubtless play with the delegate to do something else...

              P.S.
              Look at http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells:

              Check if the item is actually editable: (MyTable->model()->flags(idx) & Qt::ItemIsEditable). If not, make it so.

              https://stackoverflow.com/questions/28186118/how-to-make-qtableview-to-enter-the-editing-mode-only-on-double-click:

              Setting a Qt.ItemIsEnabled flag makes the QTableView items editable. To enter the item's editing mode the user can simply double-click it.

              EDIT: You have to loop over every item in your table view to make it individually editable....

              devhobbyD 1 Reply Last reply
              2
              • JonBJ JonB

                @devhobby
                http://doc.qt.io/qt-5/qitemdelegate.html#details must be to do with it.

                I could easily be wrong(!), but I thought the idea of the model/view would be that if you edit it would save the value back to the model, not "just give you some string". You can doubtless play with the delegate to do something else...

                P.S.
                Look at http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells:

                Check if the item is actually editable: (MyTable->model()->flags(idx) & Qt::ItemIsEditable). If not, make it so.

                https://stackoverflow.com/questions/28186118/how-to-make-qtableview-to-enter-the-editing-mode-only-on-double-click:

                Setting a Qt.ItemIsEnabled flag makes the QTableView items editable. To enter the item's editing mode the user can simply double-click it.

                EDIT: You have to loop over every item in your table view to make it individually editable....

                devhobbyD Offline
                devhobbyD Offline
                devhobby
                wrote on last edited by
                #27

                @JonB said in QSqlRelationalTableModel with multiple Joins?:

                @devhobby
                http://doc.qt.io/qt-5/qitemdelegate.html#details must be to do with it.

                I could easily be wrong(!), but I thought the idea of the model/view would be that if you edit it would save the value back to the model, not "just give you some string". You can doubtless play with the delegate to do something else...

                P.S.
                Look at http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells:

                Check if the item is actually editable: (MyTable->model()->flags(idx) & Qt::ItemIsEditable). If not, make it so.

                https://stackoverflow.com/questions/28186118/how-to-make-qtableview-to-enter-the-editing-mode-only-on-double-click:

                Setting a Qt.ItemIsEnabled flag makes the QTableView items editable. To enter the item's editing mode the user can simply double-click it.

                I'd like to change Table View's flag to Qt::ItemIsEditable... but can't find a way to do it

                There's no setFlags() method here...

                JonBJ 1 Reply Last reply
                0
                • devhobbyD devhobby

                  @JonB said in QSqlRelationalTableModel with multiple Joins?:

                  @devhobby
                  http://doc.qt.io/qt-5/qitemdelegate.html#details must be to do with it.

                  I could easily be wrong(!), but I thought the idea of the model/view would be that if you edit it would save the value back to the model, not "just give you some string". You can doubtless play with the delegate to do something else...

                  P.S.
                  Look at http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells:

                  Check if the item is actually editable: (MyTable->model()->flags(idx) & Qt::ItemIsEditable). If not, make it so.

                  https://stackoverflow.com/questions/28186118/how-to-make-qtableview-to-enter-the-editing-mode-only-on-double-click:

                  Setting a Qt.ItemIsEnabled flag makes the QTableView items editable. To enter the item's editing mode the user can simply double-click it.

                  I'd like to change Table View's flag to Qt::ItemIsEditable... but can't find a way to do it

                  There's no setFlags() method here...

                  JonBJ Offline
                  JonBJ Offline
                  JonB
                  wrote on last edited by JonB
                  #28

                  @devhobby
                  You have to loop over every item in your table view to make it individually editable (if you're not creating the items yourself, or unless someone suggests a way to cause that to happen as it binds to your model, e.g. https://stackoverflow.com/a/28226056/489865)....

                  devhobbyD 1 Reply Last reply
                  1
                  • JonBJ JonB

                    @devhobby
                    You have to loop over every item in your table view to make it individually editable (if you're not creating the items yourself, or unless someone suggests a way to cause that to happen as it binds to your model, e.g. https://stackoverflow.com/a/28226056/489865)....

                    devhobbyD Offline
                    devhobbyD Offline
                    devhobby
                    wrote on last edited by
                    #29

                    @JonB said in QSqlRelationalTableModel with multiple Joins?:

                    @devhobby
                    You have to loop over every item in your table view to make it individually editable (if you're not creating the items yourself, or unless someone suggests a way to cause that to happen as it binds to your model)....

                    Suppose I'm inside a for loop where index is a QModelIndex

                    ui->tableView->model()->data(index). ???
                    

                    There's no setFlags here still

                    JonBJ 1 Reply Last reply
                    0
                    • devhobbyD devhobby

                      @JonB said in QSqlRelationalTableModel with multiple Joins?:

                      @devhobby
                      You have to loop over every item in your table view to make it individually editable (if you're not creating the items yourself, or unless someone suggests a way to cause that to happen as it binds to your model)....

                      Suppose I'm inside a for loop where index is a QModelIndex

                      ui->tableView->model()->data(index). ???
                      

                      There's no setFlags here still

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by JonB
                      #30

                      @devhobby

                      I think we use QTableWidget, not just QTableView.

                      http://www.qtcentre.org/threads/46245-QTableWidgetItem-setflags-strange-behavior?p=209282#post209282 shows you accessing QTableWidgetItem. http://doc.qt.io/qt-5/qtablewidget.html#item

                      http://doc.qt.io/qt-5/qtablewidget.html#details:

                      The QTableWidget class provides an item-based table view with a default model.
                      Table widgets provide standard table display facilities for applications. The items in a QTableWidget are provided by QTableWidgetItem.
                      If you want a table that uses your own data model you should use QTableView rather than this class.

                      But for QTableView I previously gave you http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells?p=176235#post176235:

                      Qt::ItemFlags MyTableModel::flags (const QModelIndex &index) const
                      {
                         return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
                      }
                      

                      http://doc.qt.io/qt-5/qabstractitemmodel.html#flags, http://doc.qt.io/qt-5/qabstracttablemodel.html#flags works off the model, so presumably your ui->tableView->model()->flags(index).

                      Ah ha!! Here's what we wanted to know:
                      http://doc.qt.io/qt-5/qsqlquerymodel.html#details

                      The model is read-only by default. To make it read-write, you must subclass it and reimplement setData() and flags(). Another option is to use QSqlTableModel, which provides a read-write model based on a single database table.

                      devhobbyD 1 Reply Last reply
                      1
                      • JonBJ JonB

                        @devhobby

                        I think we use QTableWidget, not just QTableView.

                        http://www.qtcentre.org/threads/46245-QTableWidgetItem-setflags-strange-behavior?p=209282#post209282 shows you accessing QTableWidgetItem. http://doc.qt.io/qt-5/qtablewidget.html#item

                        http://doc.qt.io/qt-5/qtablewidget.html#details:

                        The QTableWidget class provides an item-based table view with a default model.
                        Table widgets provide standard table display facilities for applications. The items in a QTableWidget are provided by QTableWidgetItem.
                        If you want a table that uses your own data model you should use QTableView rather than this class.

                        But for QTableView I previously gave you http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells?p=176235#post176235:

                        Qt::ItemFlags MyTableModel::flags (const QModelIndex &index) const
                        {
                           return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
                        }
                        

                        http://doc.qt.io/qt-5/qabstractitemmodel.html#flags, http://doc.qt.io/qt-5/qabstracttablemodel.html#flags works off the model, so presumably your ui->tableView->model()->flags(index).

                        Ah ha!! Here's what we wanted to know:
                        http://doc.qt.io/qt-5/qsqlquerymodel.html#details

                        The model is read-only by default. To make it read-write, you must subclass it and reimplement setData() and flags(). Another option is to use QSqlTableModel, which provides a read-write model based on a single database table.

                        devhobbyD Offline
                        devhobbyD Offline
                        devhobby
                        wrote on last edited by devhobby
                        #31

                        @JonB said in QSqlRelationalTableModel with multiple Joins?:

                        @devhobby

                        I think we use QTableWidget, not just QTableView.

                        http://www.qtcentre.org/threads/46245-QTableWidgetItem-setflags-strange-behavior?p=209282#post209282 shows you accessing QTableWidgetItem. http://doc.qt.io/qt-5/qtablewidget.html#item

                        http://doc.qt.io/qt-5/qtablewidget.html#details:

                        The QTableWidget class provides an item-based table view with a default model.
                        Table widgets provide standard table display facilities for applications. The items in a QTableWidget are provided by QTableWidgetItem.
                        If you want a table that uses your own data model you should use QTableView rather than this class.

                        But for QTableView I previously gave you http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells?p=176235#post176235:

                        Qt::ItemFlags MyTableModel::flags (const QModelIndex &index) const
                        {
                           return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
                        }
                        

                        At this point I don't even know which of the 2 (table view/table widget) is the most appropriate for my situation.

                        The last post you linked says to reimplement the method flags() but I don't understand: after inheriting from AbstractItemModel (and reimplementing the method), what am I supposed to do?

                        JonBJ 2 Replies Last reply
                        0
                        • devhobbyD devhobby

                          @JonB said in QSqlRelationalTableModel with multiple Joins?:

                          @devhobby

                          I think we use QTableWidget, not just QTableView.

                          http://www.qtcentre.org/threads/46245-QTableWidgetItem-setflags-strange-behavior?p=209282#post209282 shows you accessing QTableWidgetItem. http://doc.qt.io/qt-5/qtablewidget.html#item

                          http://doc.qt.io/qt-5/qtablewidget.html#details:

                          The QTableWidget class provides an item-based table view with a default model.
                          Table widgets provide standard table display facilities for applications. The items in a QTableWidget are provided by QTableWidgetItem.
                          If you want a table that uses your own data model you should use QTableView rather than this class.

                          But for QTableView I previously gave you http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells?p=176235#post176235:

                          Qt::ItemFlags MyTableModel::flags (const QModelIndex &index) const
                          {
                             return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
                          }
                          

                          At this point I don't even know which of the 2 (table view/table widget) is the most appropriate for my situation.

                          The last post you linked says to reimplement the method flags() but I don't understand: after inheriting from AbstractItemModel (and reimplementing the method), what am I supposed to do?

                          JonBJ Offline
                          JonBJ Offline
                          JonB
                          wrote on last edited by JonB
                          #32

                          @devhobby
                          Look at the last bit I just added to my post above.

                          To make it [QSqlQueryModel] read-write, you must subclass it and reimplement setData() and flags().

                          (And BTW when you've done that there won't be any "iterating over items and setting the editable flag", your items will be editable through your reimplementation of QSqlQueryModel::flags().)

                          You understand how to "subclass", and how to "reimplement [override] virtual methods", don't you?

                          devhobbyD 1 Reply Last reply
                          1
                          • devhobbyD devhobby

                            @JonB said in QSqlRelationalTableModel with multiple Joins?:

                            @devhobby

                            I think we use QTableWidget, not just QTableView.

                            http://www.qtcentre.org/threads/46245-QTableWidgetItem-setflags-strange-behavior?p=209282#post209282 shows you accessing QTableWidgetItem. http://doc.qt.io/qt-5/qtablewidget.html#item

                            http://doc.qt.io/qt-5/qtablewidget.html#details:

                            The QTableWidget class provides an item-based table view with a default model.
                            Table widgets provide standard table display facilities for applications. The items in a QTableWidget are provided by QTableWidgetItem.
                            If you want a table that uses your own data model you should use QTableView rather than this class.

                            But for QTableView I previously gave you http://www.qtcentre.org/threads/38338-Can-t-edit-my-QTableView-cells?p=176235#post176235:

                            Qt::ItemFlags MyTableModel::flags (const QModelIndex &index) const
                            {
                               return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
                            }
                            

                            At this point I don't even know which of the 2 (table view/table widget) is the most appropriate for my situation.

                            The last post you linked says to reimplement the method flags() but I don't understand: after inheriting from AbstractItemModel (and reimplementing the method), what am I supposed to do?

                            JonBJ Offline
                            JonBJ Offline
                            JonB
                            wrote on last edited by JonB
                            #33

                            @devhobby
                            I'm going back to your very original post and thinking about what you're actually trying to achieve anyway. The code we're talking about is all well & good, if you want to proceed, but I'm wondering about your expectations of the interface.

                            In your pic of Employee table only, you have 1 row per employee. When you say:

                            I want to join the Employee table with EmployeePosition and EmployeeResource so that I can also see, for each employee, their positions and resources (if they have any!)

                            what are you expecting the table interface to be for the multiple positions & resources you say employees have?

                            It's all very well to say:

                            What I need, hence, is a full outer join
                            The query above gives me everything I want to know and see on the Table View

                            [I'm trusting that your code implements FULL OUTER JOIN] but left to its own devices this will mean you have many rows per employee, for each position/resource variant. Is that what you intend??

                            One thing to understand: when you're using QSqlRelationalTableModel so that you can "look up" position/resource names, the combobox you'll get will only ever allow single selection, if you're imagining that it might provide multiple selection it won't.

                            1 Reply Last reply
                            1
                            • JonBJ JonB

                              @devhobby
                              Look at the last bit I just added to my post above.

                              To make it [QSqlQueryModel] read-write, you must subclass it and reimplement setData() and flags().

                              (And BTW when you've done that there won't be any "iterating over items and setting the editable flag", your items will be editable through your reimplementation of QSqlQueryModel::flags().)

                              You understand how to "subclass", and how to "reimplement [override] virtual methods", don't you?

                              devhobbyD Offline
                              devhobbyD Offline
                              devhobby
                              wrote on last edited by devhobby
                              #34

                              @JonB said in QSqlRelationalTableModel with multiple Joins?:

                              @devhobby
                              Look at the last bit I just added to my post above.

                              To make it [QSqlQueryModel] read-write, you must subclass it and reimplement setData() and flags().

                              (And BTW when you've done that there won't be any "iterating over items and setting the editable flag", your items will be editable through your reimplementation of QSqlQueryModel::flags().)

                              You understand how to "subclass", and how to "reimplement [override] virtual methods", don't you?

                              I have my CustomModel class now deriving from QSqlQueryModel

                              #ifndef CUSTOMMODEL_H
                              #define CUSTOMMODEL_H
                              #include <QSqlQueryModel>
                              
                              class CustomModel : public QSqlQueryModel
                              {
                                  Q_OBJECT
                                  
                              public:
                                  bool setData(const QModelIndex &index, const QVariant &value, int role) override;
                                  Qt::ItemFlags flags(const QModelIndex &index) const override;
                              };
                              
                              #endif
                              

                              The problem is...

                              0_1518117868934_4f8b1d3f-c5cf-43c9-b900-be0b15d1ac81-image.png

                              The linker somehow can't match the signatures... weird.

                              I checked this link for example [ https://code.woboq.org/qt5/qtbase/src/corelib/itemmodels/qabstractitemmodel.h.html ]

                              and both setData() and flags() are the same way I overloaded them...

                              JonBJ 1 Reply Last reply
                              0
                              • devhobbyD devhobby

                                @JonB said in QSqlRelationalTableModel with multiple Joins?:

                                @devhobby
                                Look at the last bit I just added to my post above.

                                To make it [QSqlQueryModel] read-write, you must subclass it and reimplement setData() and flags().

                                (And BTW when you've done that there won't be any "iterating over items and setting the editable flag", your items will be editable through your reimplementation of QSqlQueryModel::flags().)

                                You understand how to "subclass", and how to "reimplement [override] virtual methods", don't you?

                                I have my CustomModel class now deriving from QSqlQueryModel

                                #ifndef CUSTOMMODEL_H
                                #define CUSTOMMODEL_H
                                #include <QSqlQueryModel>
                                
                                class CustomModel : public QSqlQueryModel
                                {
                                    Q_OBJECT
                                    
                                public:
                                    bool setData(const QModelIndex &index, const QVariant &value, int role) override;
                                    Qt::ItemFlags flags(const QModelIndex &index) const override;
                                };
                                
                                #endif
                                

                                The problem is...

                                0_1518117868934_4f8b1d3f-c5cf-43c9-b900-be0b15d1ac81-image.png

                                The linker somehow can't match the signatures... weird.

                                I checked this link for example [ https://code.woboq.org/qt5/qtbase/src/corelib/itemmodels/qabstractitemmodel.h.html ]

                                and both setData() and flags() are the same way I overloaded them...

                                JonBJ Offline
                                JonBJ Offline
                                JonB
                                wrote on last edited by JonB
                                #35

                                @devhobby
                                Now you're talking C++ esotericism, and I'm a Python Qt guy anyway. This one is your problem! :) Sometimes signatures don't match if you don't get your consts just right? What about the Q_INVOKABLE?

                                https://stackoverflow.com/questions/33781346/how-to-write-setdata-in-qsqlquerymodelqabstractitemmodel is an example of what claims to work? (Oohh, it uses Q_DECL_OVERRIDE for your override?)

                                devhobbyD 1 Reply Last reply
                                1
                                • JonBJ JonB

                                  @devhobby
                                  Now you're talking C++ esotericism, and I'm a Python Qt guy anyway. This one is your problem! :) Sometimes signatures don't match if you don't get your consts just right? What about the Q_INVOKABLE?

                                  https://stackoverflow.com/questions/33781346/how-to-write-setdata-in-qsqlquerymodelqabstractitemmodel is an example of what claims to work? (Oohh, it uses Q_DECL_OVERRIDE for your override?)

                                  devhobbyD Offline
                                  devhobbyD Offline
                                  devhobby
                                  wrote on last edited by devhobby
                                  #36

                                  @JonB said in QSqlRelationalTableModel with multiple Joins?:

                                  @devhobby
                                  Oohh, it uses Q_DECL_OVERRIDE for your override?

                                  Yes, it is ALSO that.

                                  Something strange is going on here...

                                  I'll try tagging someone @SGaist @VRonin

                                  --- HEADER FILE ---

                                  #ifndef MYMODEL_H
                                  #define MYMODEL_H
                                  
                                  #include <QObject>
                                  #include <QSqlQueryModel>
                                  
                                  class MyModel : public QSqlQueryModel
                                  {
                                      Q_OBJECT
                                  
                                  public:
                                      MyModel(QObject *parent = 0);
                                  
                                      Qt::ItemFlags flags(const QModelIndex &index) const override;
                                      bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
                                  };
                                  
                                  #endif // MYMODEL_H
                                  

                                  --- CPP FILE ---

                                  #include "mymodel.h"
                                  
                                  MyModel::MyModel(QObject *parent) : QSqlQueryModel(parent)
                                  {
                                  }
                                  
                                  Qt::ItemFlags MyModel::flags(const QModelIndex &index) const
                                  {
                                  
                                  }
                                  
                                  bool MyModel::setData(const QModelIndex &index, const QVariant &value, int role)
                                  {
                                  
                                  }
                                  

                                  0_1518119620573_1720abc4-b3c2-4451-9dda-e5b727282cf3-image.png

                                  1 Reply Last reply
                                  0
                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #37

                                    Your CPP file contains an error, the default value should be in the declaration of the function.

                                    If you are using Qt >= 5.7, you can simply use the override keyword as C++11 support is mandatory since that version. Q_DECL_OVERRIDE was used to allow compatibly with non-C++11 enabled compilers.

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

                                    JonBJ devhobbyD 2 Replies Last reply
                                    2
                                    • SGaistS SGaist

                                      Your CPP file contains an error, the default value should be in the declaration of the function.

                                      If you are using Qt >= 5.7, you can simply use the override keyword as C++11 support is mandatory since that version. Q_DECL_OVERRIDE was used to allow compatibly with non-C++11 enabled compilers.

                                      JonBJ Offline
                                      JonBJ Offline
                                      JonB
                                      wrote on last edited by
                                      #38

                                      @SGaist You're a hero ;-) It takes you like 1 minute to spot it & reply!

                                      1 Reply Last reply
                                      1
                                      • SGaistS SGaist

                                        Your CPP file contains an error, the default value should be in the declaration of the function.

                                        If you are using Qt >= 5.7, you can simply use the override keyword as C++11 support is mandatory since that version. Q_DECL_OVERRIDE was used to allow compatibly with non-C++11 enabled compilers.

                                        devhobbyD Offline
                                        devhobbyD Offline
                                        devhobby
                                        wrote on last edited by devhobby
                                        #39

                                        @SGaist said in QSqlRelationalTableModel with multiple Joins?:

                                        Your CPP file contains an error, the default value should be in the declaration of the function.

                                        If you are using Qt >= 5.7, you can simply use the override keyword as C++11 support is mandatory since that version. Q_DECL_OVERRIDE was used to allow compatibly with non-C++11 enabled compilers.

                                        I hoped it was just that...

                                        0_1518120023429_f174cbae-ee6a-42fa-b713-287d8d891eff-image.png

                                        I moved the default value in the header file, same issue

                                        [ I will update the code posted above so that I don't repost it everytime ]

                                        1 Reply Last reply
                                        0
                                        • SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #40

                                          Did you try re-running qmake before building ?

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

                                          devhobbyD 1 Reply Last reply
                                          2

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