SQLITE with QT Application...

Skyrim

Hi
do not have to compile the SQLite driver.

simple example:

in *.pro file add line
@
QT += sql
@
and
@
#include <QtSql/QtSql>
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("fileName.db3");
db.open();
// db.close(); // for close connection
@

more, depending on the task.

dcbasso

Thanks!

Skyrim, where you find this example?

dcbasso

Another question...
I'm trying to open my generated database with some tables on SQLITEMAN and the SQLITEMAN does not show any table on the file...
I have used sqlite on android apps and I could open the SQLITE FILES on SQLITEMAN withtout any problems....

It's a problem, it could not be done... anyone with the same "problem"?
thanks

franku

different sqlite versions?
did you at least generate any table in the database (qsqlquery, qsqltablemodel, ...)?

;-) .. frank

dcbasso

Could be the version, I read something that says Sqliteman just open sqlite3 files...

I make this code, case study code?

@
#include "banco.h"
#include "QtSql/QtSql"
#include "QDebug"

Banco::Banco(QObject *parent) :
QObject(parent)
{
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName( QDir::homePath() + QDir::separator() + "inoveDB.db3");
if (db.open()) {
QSqlQuery query(db);
if (query.exec("CREATE TABLE usuario ( INTEGER oid PRIMARY KEY);")) {
qDebug() << "criado tabela com sucesso.";
} else {
qDebug() << "erro ao criar tabela." << query.lastError();
}
} else {
qDebug() << "DB Nao aberto.";
}
db.close();
@

brazillian portuguese debug messages.

If I run this code twice, I got error saying that already exists the table "usuario".

franku

Hmm, code looks quite good. Have you tried the Firefox Plugin "SQLite Manager"? Sqlite3 is Qt-default as far as I know.

dcbasso

I read the documentation, and the Qt uses Sqlite2 only if you include the sqlite2, by default really appers to be sqlite3.
I will try try Sqlite Manager.

dcbasso

With Firefox Plugin show my "usuario" table! So my code works!
Another detail: Sqliteman uses QT!

pemoamsi

Can someone give me and example or complete code of an app with sqlite please?

SGaist

Hi and welcome to devnet,

Please don't revive old thread with new questions, open your own.

As for your question, have a look at the "Sql Example in Qt's documentation":http://qt-project.org/doc/qt-4.8/examples-sql.html

drsasa

Its working. Just SQL part you using will generate error second time becouse table already exists. You could replace with CREATE TABLE IF NOT EXISTS ....

[quote author="dcbasso" date="1341519956"]Could be the version, I read something that says Sqliteman just open sqlite3 files...

I make this code, case study code?

@
#include "banco.h"
#include "QtSql/QtSql"
#include "QDebug"

Banco::Banco(QObject *parent) :
QObject(parent)
{
QSqlDatabase db;
db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName( QDir::homePath() + QDir::separator() + "inoveDB.db3");
if (db.open()) {
QSqlQuery query(db);
if (query.exec("CREATE TABLE usuario ( INTEGER oid PRIMARY KEY);")) {
qDebug() << "criado tabela com sucesso.";
} else {
qDebug() << "erro ao criar tabela." << query.lastError();
}
} else {
qDebug() << "DB Nao aberto.";
}
db.close();
@

brazillian portuguese debug messages.

If I run this code twice, I got error saying that already exists the table "usuario".[/quote]