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  4. [solved]qt sql insert statement system not working
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[solved]qt sql insert statement system not working

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  • D Offline
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    Dronissimo
    wrote on last edited by
    #4

    try to watch

    @qDebug () << query->lastQuery() ;@

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    • D Offline
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      developer
      wrote on last edited by
      #5

      "INSERT INTO accounts (username,password,website,agroup) VALUES (:username,:password,:website,:agroup)"

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      • B Offline
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        broadpeak
        wrote on last edited by
        #6

        Do you have a VALID connection to the database?

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        • Z Offline
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          Zarko Markovic
          wrote on last edited by
          #7

          Modify and use the test code below to locate the cause of error. Also make sure the sql module is included in your project file (QT += sql).

          @ QString tDbFile = "/path../apptempdir/db.sql";
          // Try to connect
          tQSqlDatabase = QSqlDatabase::addDatabase("QSQLITE");
          tQSqlDatabase.setDatabaseName( tDbFile );
          if (!tQSqlDatabase.open())
          {
          QMessageBox::information (this, "Error", "Db connection error");
          return false;
          }

          QString tQueryString = "INSERT...";
          QSqlQuery tSqlQuery;
          tSqlQuery.exec(tQueryString);

          QString tQueryResult = tSqlQuery.lastError().databaseText() + "\n" + tSqlQuery.lastError().driverText();
          QMessageBox::information (this, "Result", tQueryResult);
          @

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          • D Offline
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            developer
            wrote on last edited by
            #8

            the result:
            1:the QT += sql is included in the project file
            2:the resut of tqueryresult
            "No query
            Unable to fetch row"

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              developer
              wrote on last edited by
              #9

              @broadpeak yes the database.open() returns true and also i am able to create table QSqlTableModel is working fine

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              • G Offline
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                gayu
                wrote on last edited by
                #10

                Are u using QMYSQL. Are u working in qt4

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                • D Offline
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                  developer
                  wrote on last edited by
                  #11

                  @gaya i am using QSQlITE yes i am working in qt4

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                  • B Offline
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                    broadpeak
                    wrote on last edited by
                    #12

                    Try this codesnippet:

                    @

                    void YourClass::init()
                    {
                    //...
                    initDB("../../../db/mydb.db3"); // of course your db path goes here
                    //...
                    }

                    void YourClass::initDB(QString dbPath)
                    {
                    vc2DB = QSqlDatabase::addDatabase("QSQLITE");
                    vc2DB.setDatabaseName(dbPath);
                    vc2DB.open();
                    QSqlQuery query;
                    query.exec("PRAGMA foreign_keys = ON;");
                    bool b = query.exec("select id from role where code = 'SU'");
                    if (!b) {
                    std::cerr << "Failed to open database: " << dbPath.toAscii().data() << std::endl;
                    exit(-1);
                    }
                    }
                    @

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                    • D Offline
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                      developer
                      wrote on last edited by
                      #13

                      there is not db path set @broadpeak

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                      • G Offline
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                        gayu
                        wrote on last edited by
                        #14

                        So u've to set the path for db

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                          developer
                          wrote on last edited by
                          #15

                          why the table has been created fine.
                          also where to seta good path for ana pplication

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                          • B Offline
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                            broadpeak
                            wrote on last edited by
                            #16

                            [quote author="developer" date="1353499828"]there is not db path set @broadpeak[/quote]

                            What? I don't understand this.

                            But! If the open() function can't open your database, it will open with the given name an another database in QSQLITE! See your databaseS.

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                              developer
                              wrote on last edited by
                              #17

                              it can open the database @broadpeek

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                                gayu
                                wrote on last edited by
                                #18

                                even though the file does not exist, the SQLite will try to create it.

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                                • B Offline
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                                  broadpeak
                                  wrote on last edited by
                                  #19

                                  [quote author="developer" date="1353500452"]it can open the database @broadpeek[/quote]

                                  Anyway, can you run (from your code) a simple SELECT on your database? Have you got a resultset?
                                  Have you grant at all for your tables?

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                                  • D Offline
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                                    developer
                                    wrote on last edited by
                                    #20

                                    ohhhhhhhhhh acutally its working with setting url a different databse opens and with just typing passwordmanager as databse name it works actaully the problem is with the table view thanks all problem solved i tried select staement and i got the result

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                                      developer
                                      wrote on last edited by
                                      #21

                                      it also works after selecting select() thanks all

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                                      • B Offline
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                                        broadpeak
                                        wrote on last edited by
                                        #22

                                        Ok, set your thread to [solved] :)

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