same problem but QPSQL DRIVER NOT LOADED

[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.

[12bibi12]

@SGaist I wrote this install_name_tool -change /Applications/Postgres.app/Contents/Versions/15/lib/libpq.5.dylib /Users/hayssamalsaffar/Qt/6.4.3/macos/plugins/sqldrivers/libqsqlpsql.dylib
and got this:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool [-change old new] ... [-rpath old new] ... [-add_rpath new] ... [-delete_rpath old] ... [-id name] input

[SGaist]

-change takes three arguments: old path, new path, file you want to change.

[12bibi12]

@SGaist I get this: error: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/install_name_tool: can't open file: libpq.5.dylib (No such file or directory)

i have checked in /Applications/Postgres.app/Contents/Versions/15/ and I have libpq5.dylib