How to using Qt classes private like QSqlRelationalTableModelPrivate to my own model
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i need to create my own model in Qt to support some features like “returning values” in firebird database and storeprocedures and etc. for this purpose I need to access private classes like “QSqlrelationalTableModelPrivate” and “QSqlTableMoelPrivate” to accessing methods in these classes.now My question is that, is there any way to accessing these classes whiteout re-implementing them in my model?
Thanks for your answering.
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i need to create my own model in Qt to support some features like “returning values” in firebird database and storeprocedures and etc. for this purpose I need to access private classes like “QSqlrelationalTableModelPrivate” and “QSqlTableMoelPrivate” to accessing methods in these classes.now My question is that, is there any way to accessing these classes whiteout re-implementing them in my model?
Thanks for your answering.
Hi,
Maybe this article will answer your questions about Qt architecture. It explains how D-pointer and Q-pointer are used as well as how to inherit Qt class using their D-pointer:
https://wiki.qt.io/D-Pointer -
Hi and welcome to devnet,
You can use
QT += sql-privateto add them but beware, these can drastically change between two Qt versions. -
thank for your Answering
i want to Access to data in "QSqlRelationalTableModelPrivate" class and this class define in "qsqlrelationaltablemodel.cpp" file, so how can i access to this class? -
What data are you interested in ?
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@SGaist
for example i created my own class named "dbModel" that inherited from QSqlRealationalTableModel class and also i have my own exec method to execute sql Query like insert, update and delete instead of QSqlTableModel'exec method . for this i overwrite "insertRowIntoTable()" method but i want the parent class(QSqlRealationalTableModel) does its jobs without execute the line " return QSqlTableModel::insertRowIntoTable(rec);" and instead of it i want execute my own method(exec). so if i do all jobs of QSqlRelationalTableModel i need to access to QSqlRelationalTableModel Private class and as you know this class define in "qsqlrealationaltablemodel.cpp" file, thus i can't access to it. so i hove to re-implement "QSqlRealatinalTableModel" class in my own class. now, i want to know is there any way to do this without re-implement QSqlRealatinalTableModel class. -
What does your custom exec method do that is different ?
You can't call a base class method in a partial way.
AFAIK there's not, but one possibility would to have your own build of Qt.
