如何在 ubuntu 中獲取 Qt PostgreSQL 插件？

Question

再會。 我寫了一個小程序來了解 Qt c ++ 和 SQL 是如何工作的。 她給我寫信：

QSqlQuery::exec: database not open
QSqlError("", "Driver not loaded", "Driver not loaded")
("QSQLITE", "QODBC", "QODBC3", "QPSQL", "QPSQL7")

上網后發現需要一個SQL插件，找到這個指令https://doc.qt.io/qt-5的插件不工作（為什么是sqlout-html/box的插件） ? 沒關系。）好的。 我 go 到文件夾 ~/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers 做“qmake -- PSQL_INCDIR=/usr/include/pgsql” 好

Running configuration tests...
Done running configuration tests.

Configure summary:

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

Qt is now configured for building. Just run 'make'.
Once everything is built, you must run 'make install'.
Qt will be installed into '/usr'.

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

做“make sub-psql”我得到了

cd psql/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/psql.pro PSQL_INCDIR=/usr/include/pgsql ) && make -f Makefile
make[1]: вход в каталог «/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql»
g++ -c -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -Wno-deprecated-copy -Wno-redundant-move -Wno-format-overflow -Wno-init-list-lifetime -D_REENTRANT -fPIC -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8 -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore/5.12.8 -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore/5.12.8/QtCore -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore -I.moc -isystem /usr/include/postgresql -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o .obj/qsql_psql.o qsql_psql.cpp
qsql_psql.cpp: In constructor ‘QPSQLDriverPrivate::QPSQLDriverPrivate()’:
qsql_psql.cpp:152:68: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
  152 |     QPSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::PostgreSQL) {}
      |                                                                    ^
In file included from qsql_psql.cpp:55:
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:66:5: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate()’
   66 |     QSqlDriverPrivate()
      |     ^~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:66:5: note:   candidate expects 0 arguments, 1 provided
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate(const QSqlDriverPrivate&)’
   61 | class QSqlDriverPrivate : public QObjectPrivate
      |       ^~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note:   no known conversion for argument 1 from ‘QSqlDriver::DbmsType’ to ‘const QSqlDriverPrivate&’
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriverPrivate&&)’
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note:   no known conversion for argument 1 from ‘QSqlDriver::DbmsType’ to ‘QSqlDriverPrivate&&’
make[1]: *** [Makefile:384: .obj/qsql_psql.o] Error 1
make[1]: выход из каталога «/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql»
make: *** [Makefile:45: sub-psql] Error 2
What's happening? I just need to work with SQL, but that's all. If we open the sqldrivers.pro project using QtCreator, and try to compile, we get 3 errors:

/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/sqlite/qsql_sqlite.cpp:147: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/sqlite/qsql_sqlite.cpp:147:73: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
  147 |     inline QSQLiteDriverPrivate() : QSqlDriverPrivate(QSqlDriver::SQLite) {}
      |                                                                         ^
/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/qsql_psql.cpp:152: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/qsql_psql.cpp:152:68: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
  152 |     QPSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::PostgreSQL) {}
      |                                                                    ^
:-1: Error: [Makefile:845: .obj/qsql_sqlite.o] Error 1

我如何獲得插件？ 我正在使用社區 QtCreator、PostgreSQL 13.1、Ubuntu 20.04。

如果我輸入命令“sudo apt install postgresql-client-13”，那么終端會顯示“最新版本的 postgresql-client-13 package (13.1-1.pgdg20.04 + 1) 已經安裝。postgresql-client- 13 被標記為手動安裝。”

"export QT_DEBUG_PLUGINS = 1" 后的 output 很大，甚至比程序本身的代碼還要大。 在這里，您建議在那里尋找什么？

我失去了希望，我還能做什么？

"export QT_DEBUG_PLUGINS = 1" https://cloud.mail.ru/public/3tnm/Zn2pjp1qr之后的日志

我在 'home/myname/Qt' 文件夾中安裝了 Qt 但是正如我現在看到的日志，有一個獨立的文件夾 /usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/ 我沒有創造它。 現在我在 '~/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers' 文件夾中運行 make 並得到新的錯誤：

anton@home:~/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers$ make sub-psql
cd psql/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/psql.pro PSQL_INCDIR=/usr/include/pgsql ) && make -f Makefile
make[1]: вход в каталог «/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql»
g++ -c -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -Wdate-time -Wshift-overflow=2 -Wduplicated-cond -Wno-stringop-overflow -Wno-deprecated-copy -Wno-redundant-move -Wno-format-overflow -Wno-init-list-lifetime -D_REENTRANT -fPIC -DQT_NO_JAVA_STYLE_ITERATORS -DQT_DEPRECATED_WARNINGS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8 -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore/5.12.8 -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore/5.12.8/QtCore -isystem /usr/include/x86_64-linux-gnu/qt5 -isystem /usr/include/x86_64-linux-gnu/qt5/QtSql -isystem /usr/include/x86_64-linux-gnu/qt5/QtCore -I.moc -isystem /usr/include/postgresql -I/usr/lib/x86_64-linux-gnu/qt5/mkspecs/linux-g++ -o .obj/qsql_psql.o qsql_psql.cpp
qsql_psql.cpp: In constructor ‘QPSQLDriverPrivate::QPSQLDriverPrivate()’:
qsql_psql.cpp:152:68: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
  152 |     QPSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::PostgreSQL) {}
      |                                                                    ^
In file included from qsql_psql.cpp:55:
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:66:5: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate()’
   66 |     QSqlDriverPrivate()
      |     ^~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:66:5: note:   candidate expects 0 arguments, 1 provided
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate(const QSqlDriverPrivate&)’
   61 | class QSqlDriverPrivate : public QObjectPrivate
      |       ^~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note:   no known conversion for argument 1 from ‘QSqlDriver::DbmsType’ to ‘const QSqlDriverPrivate&’
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note: candidate: ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriverPrivate&&)’
/usr/include/x86_64-linux-gnu/qt5/QtSql/5.12.8/QtSql/private/qsqldriver_p.h:61:7: note:   no known conversion for argument 1 from ‘QSqlDriver::DbmsType’ to ‘QSqlDriverPrivate&&’
make[1]: *** [Makefile:384: .obj/qsql_psql.o] Ошибка 1
make[1]: выход из каталога «/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql»
make: *** [Makefile:45: sub-psql] Ошибка 2

另一個有趣的點，如果你在QTCreator中打開SQLPlagin項目，你可以看到有錯誤的源/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/sqldrivers.pro有3個錯誤

/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/qsql_psql.cpp:152: error: no matching constructor for initialization of 'QSqlDriverPrivate' 

:-1: error: [Makefile:845: .obj/qsql_sqlite.o] Error 1

/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/qsql_psql.cpp:152: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
/home/anton/Qt/5.15.2/Src/qtbase/src/plugins/sqldrivers/psql/qsql_psql.cpp:152:68: error: no matching function for call to ‘QSqlDriverPrivate::QSqlDriverPrivate(QSqlDriver::DbmsType)’
  152 |     QPSQLDriverPrivate() : QSqlDriverPrivate(QSqlDriver::PostgreSQL) {}

Answer 1

如果要使用Ubuntu中的PostgreSQL插件，只需安裝客戶端，Qt提供插件：

sudo apt-get install libpq-dev

---

另一方面，如果你想編譯插件（通常是不必要的），那么你必須遵循以下步驟：

sudo apt-get install libpq-dev
git clone -b 5.15.2 https://code.qt.io/qt/qtbase.git
cd qtbase/src/plugins/sqldrivers
~/Qt/5.15.2/gcc_64/bin/qmake -- PSQL_INCDIR=/usr/include/pgsql
make sub-psql
make install