Qt connection to MySQL database not working (macOS MOJAVE)

[Liltwiss]

Hello guys, hope you're all well
I have MySQL 5.7 with MAMP installed and Qt 5.12.0.
I'm not able to connect my Qt application with the Mysql server.

I've run these 2 following commands:
1.
Macs-MacBook-Pro:/ macbook$ find / -iname libmysqlclient.18.dylib
/usr/local/lib/libmysqlclient.18.dylib
/usr/local/Cellar/mysql-connector-c/6.1.11/lib/libmysqlclient.18.dylib

Macs-MacBook-Pro:/ macbook$ install_name_tool -change libmysqlclient.18.dylib /usr/local/lib/libmysqlclient.18.dylib /Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib
Macs-MacBook-Pro:/ macbook$

I also tried to follow the following solution: https://forum.qt.io/topic/99776/problem-with-mysql-driver-on-mac

Here is a screenshot of my "Run Environnement"

I've started my application with QT_DEBUG_PLUGINS and this is a part of the output.

Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "/Users/macbook/Projets_C++/Projet_Qt/build-Projet_final-Desktop_Qt_5_12_0_clang_64bit-Debug/Projet_final.app/Contents/MacOS/sqldrivers" ...
Cannot load library /Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib: (dlopen(/Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib, 133): Library not loaded: /usr/local/mysql/lib/libmysqlclient.20.dylib
Referenced from: /Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib
Reason: image not found)
QLibraryPrivate::loadPlugin failed on "/Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib" : "Cannot load library /Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib: (dlopen(/Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib, 133): Library not loaded: /usr/local/mysql/lib/libmysqlclient.20.dylib\n Referenced from: /Users/macbook/Qt/5.12.0/clang_64/plugins/sqldrivers/libqsqlmysql.dylib\n Reason: image not found)"
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
QFactoryLoader::QFactoryLoader() checking directory path "/Users/macbook/Qt/5.12.0/clang_64/plugins/iconengines" ...
QFactoryLoader::QFactoryLoader() looking at "/Users/macbook/Qt/5.12.0/clang_64/plugins/iconengines/libqsvgicon.dylib"
Found metadata in lib /Users/macbook/Qt/5.12.0/clang_64/plugins/iconengines/libqsvgicon.dylib, metadata=
{
"IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
"MetaData": {
"Keys": [
"svg",
"svgz",
"svg.gz"
]
},
"archreq": 0,
"className": "QSvgIconPlugin",
"debug": false,
"version": 330752
}

Got keys from plugin meta data ("svg", "svgz", "svg.gz")
QFactoryLoader::QFactoryLoader() checking directory path "/Users/macbook/Projets_C++/Projet_Qt/build-Projet_final-Desktop_Qt_5_12_0_clang_64bit-Debug/Projet_final.app/Contents/MacOS/iconengines" ...
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7

Thanks in advance.

[SGaist]

Hi and welcome to devnet,

From the looks of it, your install_name_tool call is wrong. You have to path the exact same path as first argument as the one you find from the otool call.