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Sqlite database not working

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  • K Offline
    K Offline
    karthi shan
    wrote on last edited by
    #1

    i am facing some issue on updating mydata base. If have anyone idea regarding this please hepl me.

    here is my code
    #include "login.h"
    #include "ui_login.h"

    login::login(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::login)
    {
    ui->setupUi(this);

    }

    login::~login()
    {
    delete ui;
    }

    void login::on_pushButton_clicked()
    {

    PRINT<<"Connecting ....";

    QSqlDatabase myDB= QSqlDatabase::addDatabase("QSQLITE");
    myDB.setDatabaseName("/home/embdestech/Desktop/tsk/testdatabase.db");
    //db.setDatabaseName("/testdatabase.db");

    if(myDB.open())//opening database
    {
    PRINT <<"Database Opened";
    QSqlQuery qry;

    if(qry.exec("CREATE TABLE karthick(name VARCHAR[20],addr VARCHAR[20]);"))
    {
    PRINT <<"karthick Table Created...";
    }

    if(qry.exec("INSERT INTO karthick(name,addr) VALUES('hgdhjs','jfgd');"))
    {
    PRINT <<"values inserted sucessfully...";
    }
    else
    {
    PRINT <<"user Error .." << qry.lastError().text();
    PRINT <<"Closed";
    myDB.close();

        }
    

    myDB.close();

    }
    }

    M 1 Reply Last reply
    0
    • K karthi shan

      i am facing some issue on updating mydata base. If have anyone idea regarding this please hepl me.

      here is my code
      #include "login.h"
      #include "ui_login.h"

      login::login(QWidget *parent) :
      QMainWindow(parent),
      ui(new Ui::login)
      {
      ui->setupUi(this);

      }

      login::~login()
      {
      delete ui;
      }

      void login::on_pushButton_clicked()
      {

      PRINT<<"Connecting ....";

      QSqlDatabase myDB= QSqlDatabase::addDatabase("QSQLITE");
      myDB.setDatabaseName("/home/embdestech/Desktop/tsk/testdatabase.db");
      //db.setDatabaseName("/testdatabase.db");

      if(myDB.open())//opening database
      {
      PRINT <<"Database Opened";
      QSqlQuery qry;

      if(qry.exec("CREATE TABLE karthick(name VARCHAR[20],addr VARCHAR[20]);"))
      {
      PRINT <<"karthick Table Created...";
      }

      if(qry.exec("INSERT INTO karthick(name,addr) VALUES('hgdhjs','jfgd');"))
      {
      PRINT <<"values inserted sucessfully...";
      }
      else
      {
      PRINT <<"user Error .." << qry.lastError().text();
      PRINT <<"Closed";
      myDB.close();

          }
      

      myDB.close();

      }
      }

      M Offline
      M Offline
      mcosta
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      1. do you see any error??
      2. is PRINT a macro?
      3. was the karthick table created?

      you have to provide more information

      Once your problem is solved don't forget to:

      • Mark the thread as SOLVED using the Topic Tool menu
      • Vote up the answer(s) that helped you to solve the issue

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      1 Reply Last reply
      0
      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #3

        Hi and welcome to devnet,

        To add to @mcosta, you don't do anything if the database failed to open, you should also at least log a message there.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply
        0
        • K Offline
          K Offline
          karthi shan
          wrote on last edited by
          #4

          Thanks for your suggestion , Now database its working.

          1 Reply Last reply
          0
          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #5

            What was the problem ?

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

            1 Reply Last reply
            0

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