[Qt-interest] 答复: 答复: 答复: plugins directory

[pengliang(彭亮)]

Hi 

   I am sure I have installed the mysql client library.

 

Untitled2 has compiled on Qt-4.7.1.  Please see the source code in attached file.

 

when I rename /usr/local/Trolltech/Qt-4.7.1 to Qt-4.7.11111  ,it can not work.

[incam at incam04 ~]$ cd /gerfile/ken/test/

[incam at incam04 test]$ ls

accessible  bearer  codecs  designer  graphicssystems  iconengines  imageformats  inputmethods  lib  plugins  script  sqldrivers  untitled2

[incam at incam04 test]$ ./untitled2 

"/gen_db/gerfile/ken/test/lib" 

"/gen_db/gerfile/ken/test/plugins" 

"/usr/local/Trolltech/Qt-4.5.3/plugins" 

"/gen_db/gerfile/ken/test" 

QSqlDatabase: QMYSQL driver not loaded

QSqlDatabase: available drivers: QSQLITE

false open

[incam at incam04 test]$ cd plugins

[incam at incam04 plugins]$ ls

accessible  bearer  codecs  designer  graphicssystems  iconengines  imageformats  inputmethods  sqldrivers

[incam at incam04 plugins]$ cd sqldrivers/

[incam at incam04 sqldrivers]$ ls

libqsqlite.so  libqsqlmysql.so          <---  library exist.

[incam at incam04 sqldrivers]$

 

When I rename /usr/local/Trolltech/Qt-4.7.11111  to  Qt-4.7.1 , it’s ok!!

 [incam at incam04 ~]$ cd /gerfile/ken/test/

[incam at incam04 test]$ ls

abc         codecs           iconengines   lib       script

accessible  designer         imageformats  main.cpp  sqldrivers

bearer      graphicssystems  inputmethods  plugins   untitled2

[incam at incam04 test]$ ./untitled2 

"/gen_db/gerfile/ken/test/lib" 

"/gen_db/gerfile/ken/test/plugins" 

"/usr/local/Trolltech/Qt-4.7.1/plugins" 

"/gen_db/gerfile/ken/test" 

[incam at incam04 test]$ 

 

Does the program only search the libraries in "/usr/local/Trolltech/Qt-4.7.1/plugins"? 

 

 

 

 

Thanks

彭亮 Ken

 

-----邮件原件-----
发件人: qt-interest-bounces+pengliang=founder.com at qt.nokia.com [mailto:qt-interest-bounces+pengliang=founder.com at qt.nokia.com] 代表 Samuel Gaist
发送时间: 2010年12月20日 16:33
收件人: qt-interest at qt.nokia.com
主题: Re: [Qt-interest] 答复: 答复: plugins directory

 

 

On 18 déc. 2010, at 01:49, pengliang(彭亮) wrote:

 

> Hi

>         I done like you said. And I have read qt-assistant, it says same as yours.

>  But, it still can not work. “QSqlDatabase: QMYSQL driver not loaded . QSqlDatabase: available drivers: QSQLITE.

> But I add the app_path into LD_LIBRARY_PATH. It is ok.

>  

>  

> Thanks

> 彭亮 Ken

>  

>  

> 发件人: qt-interest-bounces+pengliang=founder.com at qt.nokia.com [mailto:qt-interest-bounces+pengliang=founder.com at qt.nokia.com] 代表 Joseph Caputo

> 发送时间: 2010年12月16日 21:23

> 收件人: qt-interest at qt.nokia.com

> 主题: Re: [Qt-interest] 答复: plugins directory

>  

> Your plugin needs to be in a subdirectory named "sqldrivers" for this approach to work without setting LD_LIBRARY_PATH, I think.  This mimics the structure of the global ${QTDIR}/plugins directory.  At least, that's how it worked in Qt 3.x -- I think it's the same for Qt 4.x

>  

> Joseph A. Caputo

> Vice President, Technology

> QED Financial Systems, Inc.

> 10,000 Sagemore

> Marlton, New Jersey 08053 USA

> 

> tel

> 856.797.1200

> fax

> 856.797.9719

> email

> caputo at QEDFinancialSystems.com

> This electronic message is intended only for the receipt by, and the personal and confidential use of, the designated recipient(s) named above.

> If you are not an intended recipient of this electronic message you are hereby notified that any review, dissemination, distribution or copy of 

> this message is strictly prohibited.  QED Financial Systems, Inc. reserves all rights to the content of this electronic message, which is the 

> exclusive property of QED Financial Systems.

>  

> 

> On 2010-12-16 03:57, pengliang(彭亮) wrote:

> I ran it in computer2(it installed Qt4.5.1. but I copy all librarys and plugins of Qt4.7.1 into the directory of the program and “addLibraryPath(“the program directory”).  But it failed. 

> _______________________________________________

> Qt-interest mailing list

> Qt-interest at qt.nokia.com

> http://lists.qt.nokia.com/mailman/listinfo/qt-interest

 

Hi,

Did you, as i wrote in an earlier response, install the mysql client library on computer2 ? (i.e emerge mysql on Gentoo or apt-get install libmysqlclient16 on Debian/Ubuntu)

You need the plugin to have the MySql interface in Qt but you still need the MySql client library to actually talk with the database.

 

Hope this helps

Samuel

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