MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work

Christian Ehrlicher

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

D:\Connector C++ 8.0\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory
#include "mysql/udf_registration_types.h"

Read the logs.

MostafaEzzat

@Christian-Ehrlicher

i changed to mariadb because mysql client has alot of missing files

so i used

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"
 
and MYSql detected 
then 
mingw32-make sub-mysql
then 
mingw32-make install

and everything went very well

and i copied
qsqlmysql4.dll
qsqlmysql.dl
libqsqlmysql.a

to dir D:\Qt\5.15.1\mingw81_32\bin

i test the software get

QSqlDatabase: available drivers: QSQLITE QMARIADB QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
QSqlDatabasePrivate::addDatabase: duplicate connection name 'SecConnection', old connection removed.
Donnne
"Driver not loaded Driver not loaded"

i have these files in D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\plugins\sqldrivers

in this piece of code

Databas =   QSqlDatabase::addDatabase("QMYSQL", "SecConnection");

or this

    Databas =   QSqlDatabase::addDatabase("QMARIADB", "SecConnection");

it gives me "Driver not loaded Driver not loaded"

when i use QODBC or QSQLITE

it loads successfully

so where is the problem i just want the diver to load and how to make it recognize Mariadb only

Thanks in advance

MostafaEzzat

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"

Setting up environment for Qt usage...

D:\Qt\5.15.1\mingw81_32>cd D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program
 Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\Ma
riaDB 10.0\lib"

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. yes
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no

Qt is now configured for building. Just run 'mingw32-make'.
Once everything is built, you must run 'mingw32-make install'.
Qt will be installed into 'D:\Qt\5.15.1\mingw81_32'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>

this's the command result for sure after that i used

mingw32-make sub-mysql
mingw32-make install

JonB

@MostafaEzzat
If you are having a "Driver not loaded" and don't know why, run your executable with environment variable QT_DEBUG_PLUGINS=1 for diagnostic information.

MostafaEzzat

@JonB

Sorry where should i put this variable QT_DEBUG_PLUGINS=1

do you mean by the environment .pro file ? or Options in qtcreator

jsulm

@MostafaEzzat If you start from QtCreator then set it under "Projects/Build & Run/Run/Run Environment"

MostafaEzzat

@jsulm

ok i went to Build Enviroment and added it , this output it seems it doesn't search for any sql plugins even he didn't search in

qtbase/src/plugins/sqldrivers

14:27:19: Starting C:\Users\Mostafa\Downloads\HospitalSoftware Last Version\build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug\debug\Hospital-ClinicSoftware.exe ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qdirect2d.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qdirect2d.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "direct2d"
        ]
    },
    "archreq": 0,
    "className": "QWindowsDirect2DIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("direct2d")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qminimal.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qminimal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qoffscreen.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qoffscreen.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "windows"
        ]
    },
    "archreq": 0,
    "className": "QWindowsIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("windows")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/platforms" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/platformthemes" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platformthemes/qxdgdesktopportal.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/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": 331520
}


Got keys from plugin meta data ("xdgdesktopportal", "flatpak", "snap")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/platformthemes" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/styles" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "windowsvista"
        ]
    },
    "archreq": 0,
    "className": "QWindowsVistaStylePlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("windowsvista")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/styles" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll"
DEBUG
WARNING
hello from showingdata
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/iconengines" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/iconengines/qsvgicon.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/iconengines/qsvgicon.dll, metadata=
{
    "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
    "MetaData": {
        "Keys": [
            "svg",
            "svgz",
            "svg.gz"
        ]
    },
    "archreq": 0,
    "className": "QSvgIconPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("svg", "svgz", "svg.gz")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/iconengines" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/imageformats" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "gif"
        ],
        "MimeTypes": [
            "image/gif"
        ]
    },
    "archreq": 0,
    "className": "QGifPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("gif")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "icns"
        ],
        "MimeTypes": [
            "image/x-icns"
        ]
    },
    "archreq": 0,
    "className": "QICNSPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("icns")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "ico",
            "cur"
        ],
        "MimeTypes": [
            "image/vnd.microsoft.icon",
            "image/vnd.microsoft.icon"
        ]
    },
    "archreq": 0,
    "className": "QICOPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("ico", "cur")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "jpg",
            "jpeg"
        ],
        "MimeTypes": [
            "image/jpeg",
            "image/jpeg"
        ]
    },
    "archreq": 0,
    "className": "QJpegPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("jpg", "jpeg")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "svg",
            "svgz"
        ],
        "MimeTypes": [
            "image/svg+xml",
            "image/svg+xml-compressed"
        ]
    },
    "archreq": 0,
    "className": "QSvgPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("svg", "svgz")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tga"
        ],
        "MimeTypes": [
            "image/x-tga"
        ]
    },
    "archreq": 0,
    "className": "QTgaPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("tga")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tiff",
            "tif"
        ],
        "MimeTypes": [
            "image/tiff",
            "image/tiff"
        ]
    },
    "archreq": 0,
    "className": "QTiffPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("tiff", "tif")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "wbmp"
        ],
        "MimeTypes": [
            "image/vnd.wap.wbmp"
        ]
    },
    "archreq": 0,
    "className": "QWbmpPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wbmp")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "webp"
        ],
        "MimeTypes": [
            "image/webp"
        ]
    },
    "archreq": 0,
    "className": "QWebpPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("webp")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/imageformats" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/accessiblebridge" ...

jsulm

@MostafaEzzat I don't see it trying to load any SQL drivers. Do you have anything in plugins/sqldrivers directory of your Qt installation?

By the way: it should NOT search in qtbase/src/plugins/sqldrivers as that is source code directory, it should search in D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers

MostafaEzzat

@jsulm

i copied qsqlmysql4.dll into D:\Qt\5.15.1\mingw81_32\plugins\sqldrivers

and i got this

should i copy qtbase/src/plugins/sqldrivers into D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers files into

 

Got keys from plugin meta data ("QODBC3", "QODBC")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlpsql.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlpsql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/sqldrivers" ...
("QSQLITE", "QMARIADB", "QMYSQL", "QMYSQL3", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
Cannot load library D:\Qt\5.15.1\mingw81_32\plugins\sqldrivers\qsqlmysql.dll: Unknown error 0x000000c1.
QLibraryPrivate::loadPlugin failed on "D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library D:\\Qt\\5.15.1\\mingw81_32\\plugins\\sqldrivers\\qsqlmysql.dll: Unknown error 0x000000c1."
QSqlDatabase: QMARIADB driver not loaded
QSqlDatabase: available drivers: QSQLITE QMARIADB QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
Donnne
"Driver not loaded Driver not loaded"
not Connected
QSqlQuery::exec: database not open

jsulm

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

i copied qsqlmysql4.dll

From where?

MostafaEzzat

@jsulm

neither QMARIADB nor QMYSQL both don't load

and i copied it from qtbase/src/plugins/sqldrivers
the path where i used

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"

jsulm

@MostafaEzzat It still looks like you DO not follow the documentation (https://doc.qt.io/qt-5/sql-driver.html#building-the-drivers): after building you need to do "make install", that will copy the DLLs to your Qt installation.
Also, are you sure you used the correct qmake to build the plug-ins? I'm asking because you used qmake without absolute path.

Christian Ehrlicher

@jsulm said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

I'm asking because you used qmake without absolute path.

And because the plugin name is wrong - the '4' looks suspicious.

MostafaEzzat

@jsulm

i did use

mingw32-make sub-mysql

then

mingw32-make install

but i'm not sure i use the right path because i was running this software on linux before
but this my .pro file
should i change the path from .pro file or options

#-------------------------------------------------
#
# Project created by QtCreator 2018-12-24T22:54:39
#
#-------------------------------------------------
#

QT  += core gui sql
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets designer

TARGET = Hospital-ClinicSoftware
TEMPLATE += app lib libs

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0



CONFIG += c++11 designer plugins plugin

SOURCES += \
        main.cpp \
        mainwindow.cpp \
    mainprocess.cpp \
    mysqldatabase.cpp \
    showingdata.cpp \
    delgate.cpp \
    profile3.cpp \
    profile.cpp \
   multipagewidget.cpp \
    multipagewidgetplugin.cpp \
    multipagewidgetcontainerextension.cpp \
     multipagewidgetextensionfactory.cpp \


    mysqldatabase.cpp

HEADERS += \
         mainwindow.h \
    mainprocess.h \
    showingdata.h \
    delgate.h \
    profile3.h \
    profile.h \
    multipagewidget.h \
              multipagewidgetplugin.h \
              multipagewidgetcontainerextension.h \
              multipagewidgetextensionfactory.h \
    mysqldatabase.h



FORMS += \
     mainwindow.ui \
    mainprocess.ui \
    showingdata.ui \
    profile3.ui \
    profile.ui

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

jsulm

@MostafaEzzat You should call qmake using whole path to make sure you use the one from the Qt version you're building for.

MostafaEzzat

@jsulm

such a weird thing , i didn't know that i should copy libmysql.dll to D:\Qt\5.15.1\mingw81_32\plugins\sqldrivers

i only copied to mingw81_32/bin

now it's working

Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/sqldrivers" ...
("QSQLITE", "QMARIADB", "QMYSQL", "QMYSQL3", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlmysql.dll"
Donnne
Connected

Thank you guys i do love this community

jsulm

@MostafaEzzat Yes, plug-ins are somewhat special: they are expected to be in a specific location and are loaded at runtime.