same problem but QPSQL DRIVER NOT LOADED

[jsulm]

@12bibi12 Set QT_DEBUG_PLUGINS before starting your app and check the app output then. See https://doc.qt.io/qt-6/debug.html

[12bibi12]

@jsulm how do I set it? I saw people in forum using pro file but I am using makelist

[JonB]

@12bibi12
If you read @jsulm's linked thread properly you see it has nothing to do with .pro file or "makelist". It's an environment variable which needs to be set at runtime. If you use Creator it has a Run Environment you can alter.

[12bibi12]

@JonB are you talking about this https://doc.qt.io/qt-6/debug.html

[SGaist]

@12bibi12 if you are using Qt Creator, go to the Run part of the Project panel and set the environment variable there.

[12bibi12]

@SGaist I get this problem QSqlDatabase: QPSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QPSQL
"Driver not loaded Driver not loaded"

[JonB]

@12bibi12
That is the output we would expect if you do not have QT_DEBUG_PLUGINS=1 environment variable set, which should produce a lot of detailed information. How did you set that environment variable in the run environment for your application, did you follow what we said above?

[12bibi12]

@JonB yes, in run I scrolled down to Environment, then build environment. then I choose add. in Variable I wrote QT_DEBUG_PLUGINS and in value I wrote 1

[JonB]

@12bibi12 said in same problem but QPSQL DRIVER NOT LOADED:

then build environment

We explained it is not a build time variable, it's a run-time variable. That's why it needs to go into the Run environment settings from Creator, not the Build ones.

[12bibi12]

@JonB I click the project category. in build&run I choose the one for Mac. then I choose Run. in Run settings I can see 8 different subcategories. Deployment, run, environment,custom output parses, debugger settings, performance analyzer settings, valgrind settings, qml profiler settings.

I chosed the Environment subcategory, in it I can choose different environment: clean-, system - and build environment. which one should I choose of these?

[SGaist]

@12bibi12 as we already wrote several times: Run

[12bibi12]

@SGaist okay in run there is command line arguments and other different options like working directory. do I put In QT_DEBUG_PLUGINS =1 in command line argument ? sorry but i am a beginner who is trying to work on a school project

[JonB]

@12bibi12
Google: qt creator run environment variables

Specifying Run Settings | Qt Creator Manual

Qt

https://doc.qt.io › qtcreator › creator-run-settings

To run with special environment variables set up, select them in the Run Environment section. For more information, see Selecting the Run Environment.

https://doc.qt.io/qtcreator/creator-run-settings.html#selecting-the-run-environment

[12bibi12]

@JonB I got this: Detected system locale encoding (US-ASCII, locale "C") is not UTF-8.
Qt shall use a UTF-8 locale ("UTF-8") instead. If this causes problems,
reconfigure your locale. See the locale(1) manual for more information.
qt.core.plugin.factoryloader: checking directory path "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers" ...
qt.core.plugin.factoryloader: looking at "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlite.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlite.dylib, metadata=
{
"IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
"MetaData": {
"Keys": [
"QSQLITE"
]
},
"archlevel": 0,
"className": "QSQLiteDriverPlugin",
"debug": false,
"version": 394240
}

qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QSQLITE")
qt.core.plugin.factoryloader: looking at "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlodbc.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlodbc.dylib, metadata=
{
"IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
"MetaData": {
"Keys": [
"QODBC"
]
},
"archlevel": 0,
"className": "QODBCDriverPlugin",
"debug": false,
"version": 394240
}

qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QODBC")
qt.core.plugin.factoryloader: looking at "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib"
qt.core.plugin.loader: Found metadata in lib /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib, metadata=
{
"IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
"MetaData": {
"Keys": [
"QPSQL"
]
},
"archlevel": 0,
"className": "QPSQLDriverPlugin",
"debug": false,
"version": 394240
}

qt.core.plugin.factoryloader: Got keys from plugin meta data QList("QPSQL")
qt.core.plugin.factoryloader: checking directory path "/Users/hayssamalsaffar/build-testing-Qt_6_4_3_for_macOS-Debug/testing.app/Contents/MacOS/sqldrivers" ...
qt.core.library: "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib" cannot load: Cannot load library /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib: (dlopen(/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib, 0x0085): Library not loaded: /Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib
Referenced from: <24BC2DDB-7D4E-30A3-A970-DD116917D15D> /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib
Reason: tried: '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtWidgets.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtWidgets.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtSql.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtSql.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtGui.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtGui.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/build-testing-Qt_6_4_3_for_macOS-Debug/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/build-testing-Qt_6_4_3_for_macOS-Debug/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtCore.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtCore.framework/Versions/A/libpq.5.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/usr/local/lib/libpq.5_debug.dylib' (no such file), '/usr/local/lib/libpq.5.dylib' (no such file), '/usr/lib/libpq.5_debug.dylib' (no such file, not in dyld cache), '/usr/lib/libpq.5.dylib' (no such file, not in dyld cache))
qt.core.plugin.loader: QLibraryPrivate::loadPlugin failed on "/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib" : "Cannot load library /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib: (dlopen(/Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib, 0x0085): Library not loaded: /Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib\n Referenced from: <24BC2DDB-7D4E-30A3-A970-DD116917D15D> /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib\n Reason: tried: '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtWidgets.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtWidgets.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtSql.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtSql.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtGui.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtGui.framework/Versions/A/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/build-testing-Qt_6_4_3_for_macOS-Debug/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/build-testing-Qt_6_4_3_for_macOS-Debug/libpq.5.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtCore.framework/Versions/A/libpq.5_debug.dylib' (no such file), '/Users/hayssamalsaffar/Qt/6.4.3/macos/lib/QtCore.framework/Versions/A/libpq.5.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5_debug.dylib' (no such file), '/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib' (no such file), '/usr/local/lib/libpq.5_debug.dylib' (no such file), '/usr/local/lib/libpq.5.dylib' (no such file), '/usr/lib/libpq.5_debug.dylib' (no such file, not in dyld cache), '/usr/lib/libpq.5.dylib' (no such file, not in dyld cache))"
QSqlDatabase: QPSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QPSQL
"Driver not loaded Driver not loaded"

[SGaist]

Do you have PostgreSQL installed in some fashion ?
If so, how and where did you install it ?

[12bibi12]

@SGaist i have something named postgre https://postgresapp.com. its installed in my applications. /Applications/Postgres.app/Contents

[SGaist]

From the debug log, I would guess that you installed the 15 version of the application.

You have two options here:

• Install version 14
• Use install_name_tool to update the /Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylib path to use the library from your installed Postgres.app

[12bibi12]

@SGaist i dont know exactly how to use install_name_tool.

do I write in my command install_name_tool with the path? I have never used it

[12bibi12]

@SGaist I tried instead installing version 14 but I got same error

[SGaist]

Did you check that ˋ/Applications/Postgres.app/Contents/Versions/14/lib/libpq.5.dylibˋ exists ?

As for ˋinstall_name_tool`, please read its help. It's really not complicated to replace a path with another one.