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  4. I had complied qsqlmysql.dll.
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I had complied qsqlmysql.dll.

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  • Christian EhrlicherC Offline
    Christian EhrlicherC Offline
    Christian Ehrlicher
    Lifetime Qt Champion
    wrote on last edited by
    #2

    @yuyu said in I had complied qsqlmysql.dll.:

    help me , I am crazying.

    Why not using the search function? It's a very powerful thing...

    Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
    Visit the Qt Academy at https://academy.qt.io/catalog

    yuyuY 1 Reply Last reply
    0
    • Christian EhrlicherC Christian Ehrlicher

      @yuyu said in I had complied qsqlmysql.dll.:

      help me , I am crazying.

      Why not using the search function? It's a very powerful thing...

      yuyuY Offline
      yuyuY Offline
      yuyu
      wrote on last edited by
      #3

      I do not find the answer, I used qt6.3.

      1 Reply Last reply
      0
      • yuyuY Offline
        yuyuY Offline
        yuyu
        wrote on last edited by
        #4

        QLibraryPrivate::loadPlugin failed on "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\Qt\6.3.0\mingw_64\plugins\sqldrivers\qsqlmysql.dll

        but there has the qsqlmysql.dll,i complied

        1 Reply Last reply
        0
        • Christian EhrlicherC Offline
          Christian EhrlicherC Offline
          Christian Ehrlicher
          Lifetime Qt Champion
          wrote on last edited by
          #5

          You should post the whole output of QT_DEBUG_PLUGINS and make sure (as in all other threads you will find here) that the dependencies of the plugin (= mysql dlls) are found - so that they're either in the path or parallel to the plugin.

          Qt Online Installer direct download: https://download.qt.io/official_releases/online_installers/
          Visit the Qt Academy at https://academy.qt.io/catalog

          1 Reply Last reply
          1
          • yuyuY Offline
            yuyuY Offline
            yuyu
            wrote on last edited by
            #6

            I had success when I use mysql5.7,but the same way it is error when I use mysql8

            jsulmJ 1 Reply Last reply
            0
            • yuyuY yuyu

              I had success when I use mysql5.7,but the same way it is error when I use mysql8

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #7

              @yuyu As @Christian-Ehrlicher suggested set QT_DEBUG_PLUGINS environment variable to 1 before running your app and then check its out put - it should tell you why qsqlmysql.dll could not be loaded.

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

              yuyuY 2 Replies Last reply
              0
              • jsulmJ jsulm

                @yuyu As @Christian-Ehrlicher suggested set QT_DEBUG_PLUGINS environment variable to 1 before running your app and then check its out put - it should tell you why qsqlmysql.dll could not be loaded.

                yuyuY Offline
                yuyuY Offline
                yuyu
                wrote on last edited by
                #8

                @jsulm I Had set but it tell me load error.I look up the qt doc.
                75f60e43-53c7-46d7-bfaf-4cd7e73678bc-image.png
                I do not know what is mean the note.

                1 Reply Last reply
                0
                • jsulmJ jsulm

                  @yuyu As @Christian-Ehrlicher suggested set QT_DEBUG_PLUGINS environment variable to 1 before running your app and then check its out put - it should tell you why qsqlmysql.dll could not be loaded.

                  yuyuY Offline
                  yuyuY Offline
                  yuyu
                  wrote on last edited by yuyu
                  #9

                  @jsulm said in I had complied qsqlmysql.dll.:

                  QT_DEBUG_PLUGINS
                  8904559d-35ac-49a3-94c1-98c7d5f89ee2-image.png
                  a146f299-8ca0-4c07-983d-8b6d1c41a0ed-image.png

                  jsulmJ 1 Reply Last reply
                  0
                  • yuyuY yuyu

                    @jsulm said in I had complied qsqlmysql.dll.:

                    QT_DEBUG_PLUGINS
                    8904559d-35ac-49a3-94c1-98c7d5f89ee2-image.png
                    a146f299-8ca0-4c07-983d-8b6d1c41a0ed-image.png

                    jsulmJ Offline
                    jsulmJ Offline
                    jsulm
                    Lifetime Qt Champion
                    wrote on last edited by
                    #10

                    @yuyu Please post text not images.
                    We need to see the actual error after :
                    Currently there are unreadable characters.

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

                    yuyuY 1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @yuyu Please post text not images.
                      We need to see the actual error after :
                      Currently there are unreadable characters.

                      yuyuY Offline
                      yuyuY Offline
                      yuyu
                      wrote on last edited by
                      #11

                      @jsulm

                      qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
                      qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll"
                      qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
                      {
                          "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                          "MetaData": {
                              "Keys": [
                                  "QMYSQL",
                                  "QMARIADB"
                              ]
                          },
                          "archlevel": 2,
                          "className": "QMYSQLDriverPlugin",
                          "debug": true,
                          "version": 393984
                      }
                      
                      qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Qt\\6.3.0\\mingw_64\\plugins\\sqldrivers\\qsqlmysql.dll
                      

                      I had success when i use mysql5.7 ,but the same way there has error when i use mysql8.0.22

                      jsulmJ 1 Reply Last reply
                      0
                      • yuyuY yuyu

                        @jsulm

                        qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
                        qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll"
                        qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
                        {
                            "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                            "MetaData": {
                                "Keys": [
                                    "QMYSQL",
                                    "QMARIADB"
                                ]
                            },
                            "archlevel": 2,
                            "className": "QMYSQLDriverPlugin",
                            "debug": true,
                            "version": 393984
                        }
                        
                        qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Qt\\6.3.0\\mingw_64\\plugins\\sqldrivers\\qsqlmysql.dll
                        

                        I had success when i use mysql5.7 ,but the same way there has error when i use mysql8.0.22

                        jsulmJ Offline
                        jsulmJ Offline
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #12

                        @yuyu said in I had complied qsqlmysql.dll.:

                        qsqlmysql.dll

                        In your other output there is some unreadable characters after qsqlmysql.dll:
                        Can you provide that part as readable text?

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

                        yuyuY 1 Reply Last reply
                        0
                        • jsulmJ jsulm

                          @yuyu said in I had complied qsqlmysql.dll.:

                          qsqlmysql.dll

                          In your other output there is some unreadable characters after qsqlmysql.dll:
                          Can you provide that part as readable text?

                          yuyuY Offline
                          yuyuY Offline
                          yuyu
                          wrote on last edited by yuyu
                          #13

                          @jsulm the unreadable characters is what I use qDebug output chineses,I had delete it.
                          now
                          mycode

                           qDebug() << QSqlDatabase::drivers();
                          
                              QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
                              db.setHostName("localhost");
                              db.setPort(3306);
                              db.setDatabaseName("mydb");
                              db.setUserName("root");
                              db.setPassword("123456");
                              bool ok = db.open();
                          

                          the console

                          
                          16:45:13: Debugging D:\1a_perfect\build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug\debug\testsql.exe ...
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/platforms" ...
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qdirect2d.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qdirect2d.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                              "MetaData": {
                                  "Keys": [
                                      "direct2d"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QWindowsDirect2DIntegrationPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("direct2d")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qminimal.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qminimal.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                              "MetaData": {
                                  "Keys": [
                                      "minimal"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QMinimalIntegrationPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("minimal")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qoffscreen.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qoffscreen.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                              "MetaData": {
                                  "Keys": [
                                      "offscreen"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QOffscreenIntegrationPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("offscreen")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                              "MetaData": {
                                  "Keys": [
                                      "windows"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QWindowsIntegrationPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("windows")
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/platforms" ...
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll" loaded library
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/platformthemes" ...
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/platformthemes" ...
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/styles" ...
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QStyleFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "windowsvista"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QWindowsVistaStylePlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("windowsvista")
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/styles" ...
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll" loaded library
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/iconengines" ...
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/iconengines/qsvgicon.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/iconengines/qsvgicon.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "svg",
                                      "svgz",
                                      "svg.gz"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QSvgIconPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("svg", "svgz", "svg.gz")
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/iconengines" ...
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/imageformats" ...
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "gif"
                                  ],
                                  "MimeTypes": [
                                      "image/gif"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QGifPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("gif")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "ico",
                                      "cur"
                                  ],
                                  "MimeTypes": [
                                      "image/vnd.microsoft.icon",
                                      "image/vnd.microsoft.icon"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QICOPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("ico", "cur")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "jpg",
                                      "jpeg"
                                  ],
                                  "MimeTypes": [
                                      "image/jpeg",
                                      "image/jpeg"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QJpegPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("jpg", "jpeg")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "svg",
                                      "svgz"
                                  ],
                                  "MimeTypes": [
                                      "image/svg+xml",
                                      "image/svg+xml-compressed"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QSvgPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("svg", "svgz")
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/imageformats" ...
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll" loaded library
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll" loaded library
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll" loaded library
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll" loaded library
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers" ...
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlite.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlite.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "QSQLITE"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QSQLiteDriverPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "QMYSQL",
                                      "QMARIADB"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QMYSQLDriverPlugin",
                              "debug": true,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QMYSQL", "QMARIADB")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlodbc.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlodbc.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "QODBC"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QODBCDriverPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QODBC")
                          qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlpsql.dll"
                          qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlpsql.dll, metadata=
                          {
                              "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                              "MetaData": {
                                  "Keys": [
                                      "QPSQL"
                                  ]
                              },
                              "archlevel": 2,
                              "className": "QPSQLDriverPlugin",
                              "debug": false,
                              "version": 393984
                          }
                          
                          qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QPSQL")
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/sqldrivers" ...
                          QList("QSQLITE", "QMARIADB", "QMYSQL", "QODBC", "QPSQL")
                          qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" loaded library
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/accessible" ...
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/accessible" ...
                          qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/accessiblebridge" ...
                          qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/accessiblebridge" ...
                          
                          jsulmJ 1 Reply Last reply
                          0
                          • yuyuY yuyu

                            @jsulm the unreadable characters is what I use qDebug output chineses,I had delete it.
                            now
                            mycode

                             qDebug() << QSqlDatabase::drivers();
                            
                                QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
                                db.setHostName("localhost");
                                db.setPort(3306);
                                db.setDatabaseName("mydb");
                                db.setUserName("root");
                                db.setPassword("123456");
                                bool ok = db.open();
                            

                            the console

                            
                            16:45:13: Debugging D:\1a_perfect\build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug\debug\testsql.exe ...
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/platforms" ...
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qdirect2d.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qdirect2d.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                "MetaData": {
                                    "Keys": [
                                        "direct2d"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QWindowsDirect2DIntegrationPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("direct2d")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qminimal.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qminimal.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                "MetaData": {
                                    "Keys": [
                                        "minimal"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QMinimalIntegrationPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("minimal")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qoffscreen.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qoffscreen.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                "MetaData": {
                                    "Keys": [
                                        "offscreen"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QOffscreenIntegrationPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("offscreen")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
                                "MetaData": {
                                    "Keys": [
                                        "windows"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QWindowsIntegrationPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("windows")
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/platforms" ...
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/platforms/qwindows.dll" loaded library
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/platformthemes" ...
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/platformthemes" ...
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/styles" ...
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QStyleFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "windowsvista"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QWindowsVistaStylePlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("windowsvista")
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/styles" ...
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/styles/qwindowsvistastyle.dll" loaded library
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/iconengines" ...
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/iconengines/qsvgicon.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/iconengines/qsvgicon.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "svg",
                                        "svgz",
                                        "svg.gz"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QSvgIconPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("svg", "svgz", "svg.gz")
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/iconengines" ...
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/imageformats" ...
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "gif"
                                    ],
                                    "MimeTypes": [
                                        "image/gif"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QGifPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("gif")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "ico",
                                        "cur"
                                    ],
                                    "MimeTypes": [
                                        "image/vnd.microsoft.icon",
                                        "image/vnd.microsoft.icon"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QICOPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("ico", "cur")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "jpg",
                                        "jpeg"
                                    ],
                                    "MimeTypes": [
                                        "image/jpeg",
                                        "image/jpeg"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QJpegPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("jpg", "jpeg")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "svg",
                                        "svgz"
                                    ],
                                    "MimeTypes": [
                                        "image/svg+xml",
                                        "image/svg+xml-compressed"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QSvgPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("svg", "svgz")
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/imageformats" ...
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qgif.dll" loaded library
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qico.dll" loaded library
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qjpeg.dll" loaded library
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/imageformats/qsvg.dll" loaded library
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers" ...
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlite.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlite.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "QSQLITE"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QSQLiteDriverPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "QMYSQL",
                                        "QMARIADB"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QMYSQLDriverPlugin",
                                "debug": true,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QMYSQL", "QMARIADB")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlodbc.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlodbc.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "QODBC"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QODBCDriverPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QODBC")
                            qt.core.plugin.factoryloader: looking at "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlpsql.dll"
                            qt.core.plugin.loader: Found metadata in lib C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlpsql.dll, metadata=
                            {
                                "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
                                "MetaData": {
                                    "Keys": [
                                        "QPSQL"
                                    ]
                                },
                                "archlevel": 2,
                                "className": "QPSQLDriverPlugin",
                                "debug": false,
                                "version": 393984
                            }
                            
                            qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QPSQL")
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/sqldrivers" ...
                            QList("QSQLITE", "QMARIADB", "QMYSQL", "QODBC", "QPSQL")
                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" loaded library
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/accessible" ...
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/accessible" ...
                            qt.core.plugin.factoryloader: checking directory path "C:/Qt/6.3.0/mingw_64/plugins/accessiblebridge" ...
                            qt.core.plugin.factoryloader: checking directory path "D:/1a_perfect/build-testsql-Desktop_Qt_6_3_0_MinGW_64_bit-Debug/debug/accessiblebridge" ...
                            
                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #14

                            @yuyu said in I had complied qsqlmysql.dll.:

                            qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" loaded library

                            Looks good now

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

                            yuyuY 1 Reply Last reply
                            0
                            • jsulmJ jsulm

                              @yuyu said in I had complied qsqlmysql.dll.:

                              qt.core.library: "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" loaded library

                              Looks good now

                              yuyuY Offline
                              yuyuY Offline
                              yuyu
                              wrote on last edited by
                              #15

                              @jsulm I can not connect my mysql database .

                              jsulmJ NevezN 2 Replies Last reply
                              0
                              • yuyuY yuyu

                                @jsulm I can not connect my mysql database .

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

                                @yuyu What does db.open() return?
                                What does https://doc.qt.io/qt-5/qsqldatabase.html#lastError return after open() call?

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

                                yuyuY 1 Reply Last reply
                                0
                                • yuyuY yuyu

                                  @jsulm I can not connect my mysql database .

                                  NevezN Offline
                                  NevezN Offline
                                  Nevez
                                  wrote on last edited by
                                  #17

                                  @yuyu Still getting driver not installed error? and yes share the result of db.open() as well.

                                  1 Reply Last reply
                                  0
                                  • jsulmJ jsulm

                                    @yuyu What does db.open() return?
                                    What does https://doc.qt.io/qt-5/qsqldatabase.html#lastError return after open() call?

                                    yuyuY Offline
                                    yuyuY Offline
                                    yuyu
                                    wrote on last edited by
                                    #18

                                    @jsulm false

                                    jsulmJ 1 Reply Last reply
                                    0
                                    • yuyuY yuyu

                                      @jsulm false

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

                                      @yuyu I asked two questions. Would you be so kind to also answer the second one?

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

                                      yuyuY 1 Reply Last reply
                                      0
                                      • jsulmJ jsulm

                                        @yuyu I asked two questions. Would you be so kind to also answer the second one?

                                        yuyuY Offline
                                        yuyuY Offline
                                        yuyu
                                        wrote on last edited by
                                        #20

                                        @Nevez yes,but I had install it. it return false.
                                        sometime has
                                        42e82386-47d7-4a05-91c6-2934dd95689d-image.png

                                        qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Qt\\6.3.0\\mingw_64\\plugins\\sqldrivers\\qsqlmysql.dll:
                                        
                                        jsulmJ NevezN 2 Replies Last reply
                                        0
                                        • yuyuY yuyu

                                          @Nevez yes,but I had install it. it return false.
                                          sometime has
                                          42e82386-47d7-4a05-91c6-2934dd95689d-image.png

                                          qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "C:/Qt/6.3.0/mingw_64/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library C:\\Qt\\6.3.0\\mingw_64\\plugins\\sqldrivers\\qsqlmysql.dll:
                                          
                                          jsulmJ Offline
                                          jsulmJ Offline
                                          jsulm
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #21

                                          @yuyu I'm confused: before you posted output showing that the plug-in was loaded.
                                          Now you posted output showing that it could not be loaded.

                                          Please do again what was suggested before: set QT_DEBUG_PLUGINS and if the plug-in fails to load post the output here...

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

                                          yuyuY 1 Reply Last reply
                                          0

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