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Deploy qt desktop app 'Driver not loaded'

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  • SGaistS SGaist

    Hi and welcome to devnet,

    First and very important thing: NEVER put anything in "C:/Windows", that's a pretty bad thing to do that can have major consequences on your installed software.

    You should only need to copy the MySQL dll(s) in the same folder as your application.

    A Offline
    A Offline
    AdrianN17
    wrote on last edited by
    #3

    @SGaist I copy libmysql.dll and libmysqld.dll in /release/sqldriver in the same folder but I have 'Driver not loaded' error, equal to copy to /release folder

    alt text

    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by SGaist
      #4

      I meant in the same folder as your executable.

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

      A 1 Reply Last reply
      0
      • SGaistS SGaist

        I meant in the same folder as your executable.

        A Offline
        A Offline
        AdrianN17
        wrote on last edited by
        #5

        @SGaist alt text

        The same error in the executable folder

        1 Reply Last reply
        0
        • A Offline
          A Offline
          AdrianN17
          wrote on last edited by AdrianN17
          #6

          I change mysql version to 8.0, using workbrench to create the database. Using c++ conector

          alt text

          Add mysqlcppconn.lib

          copy and paste this dll in executable folder
          copy and paste this dll in executable folder /sqldrivers
          alt text

          But, I had mysql driver not loaded

          Also I tried to connect using ODBC Mysql

          alt text

          The conection between the database work fine, but I can't execute query like 'SELECT ID_usuario,nombre,apellido,dni,telefono,correo,cargo,direccion FROM usuario WHERE user = :user and pass = :pass; ', all return -1 in query.size, is the same code that I used in qmysql , query.lastError().text() return empty

          alt text

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #7

            You can set the QT_DEBUG_PLUGINS environment variable to check what is going on with them.

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

            A 1 Reply Last reply
            1
            • SGaistS SGaist

              You can set the QT_DEBUG_PLUGINS environment variable to check what is going on with them.

              A Offline
              A Offline
              AdrianN17
              wrote on last edited by AdrianN17
              #8

              @SGaist Yes, I add QT_DEBUG_PLUGINS = 1 in qtcreator system enviroment

              When I deploy my app with windeploy and run in qtcreator (is equal to open .exe app) release

              .pro file mysql

              win32: LIBS += -LC:/Users/Adrian/Desktop/mysql-5.7.26-winx64/lib/ -llibmysql

              INCLUDEPATH += C:/Users/Adrian/Desktop/mysql-5.7.26-winx64/include
              DEPENDPATH += C:/Users/Adrian/Desktop/mysql-5.7.26-winx64/include

              QSqlDatabase: QMYSQL driver not loaded
              QSqlDatabase: available drivers:
              QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
              "Driver not loaded Driver not loaded"

              When I use ODBC, no windeploy, in qtcreator debug.

              Got keys from plugin meta data ("windowsvista")
              QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/styles" ...
              loaded library "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll"
              QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/accessible" ...
              QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/accessible" ...
              QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/accessiblebridge" ...
              QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/accessiblebridge" ...
              QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbcd.dll"
              QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll"
              QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindowsd.dll"

              Using again Laragon Mysql 5.7.24

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              0
              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #9

                The very first object you must create is a QCoreApplication (or QQuiApplication/QApplication) otherwise the required internals won't be initialised.

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

                A 1 Reply Last reply
                0
                • SGaistS SGaist

                  The very first object you must create is a QCoreApplication (or QQuiApplication/QApplication) otherwise the required internals won't be initialised.

                  A Offline
                  A Offline
                  AdrianN17
                  wrote on last edited by
                  #10

                  @SGaist Do you mean to main.cpp?

                  This is my main.cpp

                  #include "vistas/login.h"
                  #include <QApplication>

                  int main(int argc, char *argv[])
                  {
                  QApplication a(argc, argv);
                  login w;
                  w.show();

                  return a.exec();

                  }

                  If change to QCoreApplication

                  #include "vistas/login.h"
                  #include <QCoreApplication>

                  int main(int argc, char *argv[])
                  {
                  QCoreApplication a(argc, argv);
                  login w;
                  w.show();

                  return a.exec();

                  }

                  QWidget: Cannot create a QWidget without QApplication
                  16:27:10: The program has unexpectedly finished.
                  16:27:10: The process was ended forcefully.
                  16:27:10: D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Release/release/restaurante_tunqui.exe crashed.

                  1 Reply Last reply
                  0
                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    The ODBC failure you had was because of a missing QCoreApplication based object.

                    Your current error comes from the fact that you are trying to show a widget while you created only a QCoreApplication. Qt widgets requires a QApplication object.

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

                    A 1 Reply Last reply
                    0
                    • SGaistS SGaist

                      The ODBC failure you had was because of a missing QCoreApplication based object.

                      Your current error comes from the fact that you are trying to show a widget while you created only a QCoreApplication. Qt widgets requires a QApplication object.

                      A Offline
                      A Offline
                      AdrianN17
                      wrote on last edited by AdrianN17
                      #12

                      @SGaist I don´t understand , do you mean this error to QODBC?

                      QSqlDatabase: QMYSQL driver not loaded
                      QSqlDatabase: available drivers:
                      QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
                      "Driver not loaded Driver not loaded"

                      This is QMYSQL error when I deploy my app and run. QTCreator gives me a better error report instead of opening my .exe app

                      Sorry if I also confused him by using 2 drivers

                      • QMYSQL work fine with qtcreator, but no after deployment

                      • QODBC only open database in qtcreator , but no work SELECT (I use the same queries for both)

                      Conection file conexion.cpp

                      #include "conexion.h"

conexion::conexion()
{

}

QSqlDatabase conexion::conecta()
{
    /*QSqlDatabase db;
    db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setUserName("root");
    db.setPassword("");
    db.setDatabaseName("tunqui_restaurante");*/

    QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
    db.setDatabaseName("Driver={MySQL ODBC 8.0 ANSI Driver};Server=localhost;DATABASE=tunqui_restaurante;");
    db.setUserName("root");
    db.setPassword("");


    if (db.open()){
         qDebug() << "true";
    }
    else {
        qDebug() << db.lastError().text();
    }

    return db;
}

                      Conection file conexion.h

                      #ifndef CONEXION_H
#define CONEXION_H

#include <QtSql>


class conexion
{
public:
    conexion();
    QSqlDatabase conecta();
};

#endif // CONEXION_H

                      controller file controlador.cpp

                      #include "controlador.h"

controlador::controlador()
{

}

static QSqlDatabase con=conexion().conecta();

//ingresar

usuario controlador::logear(acceso ac)
{
    usuario us= usuario();

    QSqlQuery query(con);

    QString sentence= "SELECT ID_usuario,nombre,apellido,dni,telefono,correo,cargo,direccion FROM usuario WHERE user = :user and pass = :pass; ";
    query.prepare(sentence);
    query.bindValue(":user",ac.get_user());
    query.bindValue(":pass",ac.get_pass());


    query.exec();


    if (query.size()>0)
    {
        while(query.next())
        {
            us.set_ID_usuario(query.value("ID_usuario").toInt());
            us.set_nombre(query.value("nombre").toString());
            us.set_apellido(query.value("apellido").toString());
            us.set_dni(query.value("dni").toString());
            us.set_telefono(query.value("telefono").toString());
            us.set_correo(query.value("correo").toString());
            us.set_cargo(query.value("cargo").toInt());
            us.set_direccion(query.value("direccion").toString());

        }
    }


    return us;
}
                      jsulmJ 1 Reply Last reply
                      0
                      • A AdrianN17

                        @SGaist I don´t understand , do you mean this error to QODBC?

                        QSqlDatabase: QMYSQL driver not loaded
                        QSqlDatabase: available drivers:
                        QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
                        "Driver not loaded Driver not loaded"

                        This is QMYSQL error when I deploy my app and run. QTCreator gives me a better error report instead of opening my .exe app

                        Sorry if I also confused him by using 2 drivers

                        • QMYSQL work fine with qtcreator, but no after deployment

                        • QODBC only open database in qtcreator , but no work SELECT (I use the same queries for both)

                        Conection file conexion.cpp

                        #include "conexion.h"

conexion::conexion()
{

}

QSqlDatabase conexion::conecta()
{
    /*QSqlDatabase db;
    db = QSqlDatabase::addDatabase("QMYSQL");
    db.setHostName("localhost");
    db.setUserName("root");
    db.setPassword("");
    db.setDatabaseName("tunqui_restaurante");*/

    QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
    db.setDatabaseName("Driver={MySQL ODBC 8.0 ANSI Driver};Server=localhost;DATABASE=tunqui_restaurante;");
    db.setUserName("root");
    db.setPassword("");


    if (db.open()){
         qDebug() << "true";
    }
    else {
        qDebug() << db.lastError().text();
    }

    return db;
}

                        Conection file conexion.h

                        #ifndef CONEXION_H
#define CONEXION_H

#include <QtSql>


class conexion
{
public:
    conexion();
    QSqlDatabase conecta();
};

#endif // CONEXION_H

                        controller file controlador.cpp

                        #include "controlador.h"

controlador::controlador()
{

}

static QSqlDatabase con=conexion().conecta();

//ingresar

usuario controlador::logear(acceso ac)
{
    usuario us= usuario();

    QSqlQuery query(con);

    QString sentence= "SELECT ID_usuario,nombre,apellido,dni,telefono,correo,cargo,direccion FROM usuario WHERE user = :user and pass = :pass; ";
    query.prepare(sentence);
    query.bindValue(":user",ac.get_user());
    query.bindValue(":pass",ac.get_pass());


    query.exec();


    if (query.size()>0)
    {
        while(query.next())
        {
            us.set_ID_usuario(query.value("ID_usuario").toInt());
            us.set_nombre(query.value("nombre").toString());
            us.set_apellido(query.value("apellido").toString());
            us.set_dni(query.value("dni").toString());
            us.set_telefono(query.value("telefono").toString());
            us.set_correo(query.value("correo").toString());
            us.set_cargo(query.value("cargo").toInt());
            us.set_direccion(query.value("direccion").toString());

        }
    }


    return us;
}
                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #13

                        @AdrianN17

                        int main(int argc, char *argv[])
{
QApplication a(argc, argv); // <--- HERE
login w;
w.show();

return a.exec();

}

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

                        A 1 Reply Last reply
                        0
                        • jsulmJ jsulm

                          @AdrianN17

                          int main(int argc, char *argv[])
{
QApplication a(argc, argv); // <--- HERE
login w;
w.show();

return a.exec();

}
                          A Offline
                          A Offline
                          AdrianN17
                          wrote on last edited by AdrianN17
                          #14

                          @jsulm said in Deploy qt desktop app 'Driver not loaded':

                          int main(int argc, char *argv[])
                          {
                          QApplication a(argc, argv); // <--- HERE
                          login w;
                          w.show();

                          return a.exec();

                          }

                          I don't understand. What should it be there?

                          If I change QApplication for QCoreApplication = QWidget: Cannot create a QWidget without QApplication

                          Sorry I'm newbie using the QMySQL driver and libmysql.dll

                          The problem is after deploying my desktop app.

                          jsulmJ 1 Reply Last reply
                          0
                          • A AdrianN17

                            @jsulm said in Deploy qt desktop app 'Driver not loaded':

                            int main(int argc, char *argv[])
                            {
                            QApplication a(argc, argv); // <--- HERE
                            login w;
                            w.show();

                            return a.exec();

                            }

                            I don't understand. What should it be there?

                            If I change QApplication for QCoreApplication = QWidget: Cannot create a QWidget without QApplication

                            Sorry I'm newbie using the QMySQL driver and libmysql.dll

                            The problem is after deploying my desktop app.

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #15

                            @AdrianN17 said in Deploy qt desktop app 'Driver not loaded':

                            QApplication

                            instead of QCoreApplication.

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

                            A 1 Reply Last reply
                            0
                            • jsulmJ jsulm

                              @AdrianN17 said in Deploy qt desktop app 'Driver not loaded':

                              QApplication

                              instead of QCoreApplication.

                              A Offline
                              A Offline
                              AdrianN17
                              wrote on last edited by
                              #16

                              @jsulm Ok thanks, but I was using QApplication from the beginning.

                              jsulmJ 1 Reply Last reply
                              0
                              • A AdrianN17

                                @jsulm Ok thanks, but I was using QApplication from the beginning.

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by
                                #17

                                @AdrianN17 If you have "Cannot create a QWidget without QApplication" error with QApplication, then you're creating QWidget based class instance somewhere before QApplication instance is created. You need to check that. Do you have any static objects?

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

                                A 1 Reply Last reply
                                2
                                • jsulmJ jsulm

                                  @AdrianN17 If you have "Cannot create a QWidget without QApplication" error with QApplication, then you're creating QWidget based class instance somewhere before QApplication instance is created. You need to check that. Do you have any static objects?

                                  A Offline
                                  A Offline
                                  AdrianN17
                                  wrote on last edited by AdrianN17
                                  #18

                                  @jsulm I only was tested using a QCoreApplication instead QApplication :

                                  @SGaist said in Deploy qt desktop app 'Driver not loaded':

                                  The very first object you must create is a QCoreApplication (or QQuiApplication/QApplication) otherwise the required internals won't be initialised.

                                  Because I have that problem when I deploy and execute my app:

                                  QSqlDatabase: QMYSQL driver not loaded
                                  QSqlDatabase: available drivers:
                                  QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
                                  "Driver not loaded Driver not loaded"

                                  Because so far, I only had that error doing the test. The only problem really is with QMysql driver not loaded

                                  Excuse me if I confused you

                                  jsulmJ 1 Reply Last reply
                                  0
                                  • A AdrianN17

                                    @jsulm I only was tested using a QCoreApplication instead QApplication :

                                    @SGaist said in Deploy qt desktop app 'Driver not loaded':

                                    The very first object you must create is a QCoreApplication (or QQuiApplication/QApplication) otherwise the required internals won't be initialised.

                                    Because I have that problem when I deploy and execute my app:

                                    QSqlDatabase: QMYSQL driver not loaded
                                    QSqlDatabase: available drivers:
                                    QSqlDatabase: an instance of QCoreApplication is required for loading driver plugins
                                    "Driver not loaded Driver not loaded"

                                    Because so far, I only had that error doing the test. The only problem really is with QMysql driver not loaded

                                    Excuse me if I confused you

                                    jsulmJ Offline
                                    jsulmJ Offline
                                    jsulm
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #19

                                    @AdrianN17 said in Deploy qt desktop app 'Driver not loaded':

                                    I only was tested using a QCoreApplication instead QApplication

                                    Again: if you're using widgets in your app you have to use QApplication.
                                    And if you then have that error message then please check whether or not you're creating any QWidget based objects before QApplication or post whole code here, so we can check. Else I can't help you.

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

                                    1 Reply Last reply
                                    1
                                    • A Offline
                                      A Offline
                                      AdrianN17
                                      wrote on last edited by AdrianN17
                                      #20

                                      @jsulm

                                      QMYSQL - libmysql.dll mysql-5.7.26-winx64 driver

                                      .pro

                                      # Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target





win32: LIBS += -LC:/Users/Adrian/Desktop/mysql-5.7.26-winx64/lib/ -llibmysql

INCLUDEPATH += C:/Users/Adrian/Desktop/mysql-5.7.26-winx64/include
DEPENDPATH += C:/Users/Adrian/Desktop/mysql-5.7.26-winx64/include

                                      QT DEBUG PLUGINS

                                      01:57:42: Starting D:\Proyectos\Proyecto_Restaurante_Qt\build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug\debug\restaurante_tunqui.exe ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlite.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlite.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 0,
    "className": "QSQLiteDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlite.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlited.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlited.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QSQLITE"
        ]
    },
    "archreq": 1,
    "className": "QSQLiteDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QSQLITE")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysql.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 0,
    "className": "QMYSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysqld.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QMYSQL3",
            "QMYSQL"
        ]
    },
    "archreq": 1,
    "className": "QMYSQLDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QMYSQL3", "QMYSQL")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbc.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbc.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 0,
    "className": "QODBCDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbc.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbcd.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlodbcd.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QODBC3",
            "QODBC"
        ]
    },
    "archreq": 1,
    "className": "QODBCDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QODBC3", "QODBC")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlpsql.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlpsql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlpsql.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlpsqld.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlpsqld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 1,
    "className": "QPSQLDriverPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("QPSQL7", "QPSQL")
loaded library "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysqld.dll"
true
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qdirect2d.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qdirect2d.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "direct2d"
        ]
    },
    "archreq": 0,
    "className": "QWindowsDirect2DIntegrationPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qdirect2d.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qdirect2dd.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qdirect2dd.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "direct2d"
        ]
    },
    "archreq": 1,
    "className": "QWindowsDirect2DIntegrationPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("direct2d")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qminimal.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qminimal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qminimal.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qminimald.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qminimald.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 1,
    "className": "QMinimalIntegrationPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qoffscreen.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qoffscreen.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qoffscreen.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qoffscreend.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qoffscreend.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 1,
    "className": "QOffscreenIntegrationPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwebgl.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwebgl.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 0,
    "className": "QWebGLIntegrationPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwebgl.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwebgld.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwebgld.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "webgl"
        ]
    },
    "archreq": 1,
    "className": "QWebGLIntegrationPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("webgl")
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindows.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindows.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "windows"
        ]
    },
    "archreq": 0,
    "className": "QWindowsIntegrationPlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindows.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindowsd.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindowsd.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "windows"
        ]
    },
    "archreq": 1,
    "className": "QWindowsIntegrationPlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("windows")
QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/platforms" ...
loaded library "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindowsd.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes/qxdgdesktopportal.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes/qxdgdesktopportal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "xdgdesktopportal",
            "flatpak",
            "snap"
        ]
    },
    "archreq": 0,
    "className": "QXdgDesktopPortalThemePlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes/qxdgdesktopportal.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes/qxdgdesktopportald.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/platformthemes/qxdgdesktopportald.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "xdgdesktopportal",
            "flatpak",
            "snap"
        ]
    },
    "archreq": 1,
    "className": "QXdgDesktopPortalThemePlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("xdgdesktopportal", "flatpak", "snap")
QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/platformthemes" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyle.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyle.dll, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "windowsvista"
        ]
    },
    "archreq": 0,
    "className": "QWindowsVistaStylePlugin",
    "debug": false,
    "version": 330752
}


"The plugin 'D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyle.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)" 
         not a plugin
QFactoryLoader::QFactoryLoader() looking at "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll"
Found metadata in lib D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "windowsvista"
        ]
    },
    "archreq": 1,
    "className": "QWindowsVistaStylePlugin",
    "debug": true,
    "version": 330752
}


Got keys from plugin meta data ("windowsvista")
QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/styles" ...
loaded library "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Programas/QT/5.12.3/msvc2017_64/plugins/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Proyectos/Proyecto_Restaurante_Qt/build-restaurante_tunqui-Desktop_Qt_5_12_3_MSVC2017_64bit-Debug/debug/accessiblebridge" ...
QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/sqldrivers/qsqlmysqld.dll" 
QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/styles/qwindowsvistastyled.dll" 
QLibraryPrivate::unload succeeded on "D:/Programas/QT/5.12.3/msvc2017_64/plugins/platforms/qwindowsd.dll"

                                      After deploy

                                      alt text
                                      alt text
                                      *Profile and Release have the same result

                                      Before deploy
                                      alt text
                                      alt text

                                      1 Reply Last reply
                                      0
                                      • A Offline
                                        A Offline
                                        AdrianN17
                                        wrote on last edited by AdrianN17
                                        #21

                                        Change my odbc conection

                                        QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
    db.setDatabaseName("Driver={MySQL ODBC 8.0 ANSI Driver};Server=localhost;DATABASE=tunqui_restaurante;");
    db.setUserName("root");
    db.setPassword("");

                                        and my query

                                        //if (query.size()>0) comment this line
    {
 while(query.next())
        {
            us.set_ID_usuario(query.value("ID_usuario").toInt());
            us.set_nombre(query.value("nombre").toString());
            us.set_apellido(query.value("apellido").toString());
            us.set_dni(query.value("dni").toString());
            us.set_telefono(query.value("telefono").toString());
            us.set_correo(query.value("correo").toString());
            us.set_cargo(query.value("cargo").toInt());
            us.set_direccion(query.value("direccion").toString());

        }
//}

                                        ODBC conection work fine and I can log in my app (error code fixed)

                                        But when I deploy with windeployqt I had the same problem with QMYSQL

                                        windeployqt command : windeployqt restaurante_tunqui.exe

                                        alt text

                                        1 Reply Last reply
                                        0
                                        • A Offline
                                          A Offline
                                          AdrianN17
                                          wrote on last edited by AdrianN17
                                          #22

                                          I found the solution:

                                              
#include "controlador.h"
#include "qmessagebox.h"

controlador::controlador()
{

}

static QSqlDatabase con=conexion().conecta();

                                          to

                                          usuario controlador::logear(acceso ac)
{
    usuario us= usuario();

    QSqlDatabase con=conexion().conecta();

    QSqlQuery query(con);

                                          #include "vistas/login.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication::libraryPaths();
    QApplication a(argc, argv);
    login w;
    w.show();

    return a.exec();
}

                                          https://forum.qt.io/topic/66480/deploy-on-windows/14

                                          I think because static db conection, windeployqt work fine

                                          1 Reply Last reply
                                          0

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