SQL query

[JD2000]

Hi Folks,
A hopefully simple question!
With QSqlQuery a database can be updated with bound values eg:



QSqlQuery query;
query.prepare("INSERT INTO people(ID,Name,Age) "
"VALUES (?, ?, ?)");
query.addBindValue(1);
query.addBindValue("Fred Bloggs");
query.addBindValue(21);
query.exec();


How is this done with a QSqlQueryModel ?

Thanks

[montuno]

Yes, you can do this with QSqlQueryModel. But, I'm afraid, not in the (simple) way you are expecting. QSqlQueryModel doesn't do such things automatically, it is 'only' a box or a container for holding data.

1) If your data comes from a single table, then QSqlTableModel will do the job for you (Query, Insert, Update, Delete). Why? Because it's easy to abstract the sql queries for a single table.

2) Is the data coming from multiple tables, then Qt simple doesn't know 'magically', where the data is coming from and, for example, which model-colum is representing which attribut on which table. The 'only' help in this case you got is: QSqlQueryModel provides a simple way for filling the model with data by passing a Sql-query to it.

[JD2000]

I had assumed that something along the lines of



QSqlQueryModel *model = new QSqlQueryModel(this);
QSqlQuery query;
query.prepare("INSERT INTO INSERT INTO people(ID,Name,Age) VALUES (?, ?, ?)");
query.addBindValue(1);
query.addBindValue("Fred Bloggs");
query.addBindValue(21);
model->setQuery(query);


would do the trick but 'query.lastQuery()' seems to indicate that the values are not being bound.

[JD2000]

Thanks montuno,

I'll try the the QSqlTableModel you suggest.

[JD2000]

Actually I've discovered that the following works!


QSqlQuery query;
query.prepare("INSERT INTO INSERT INTO people(ID,Name,Age) VALUES (?, ?, ?)");
query.addBindValue(1);
query.addBindValue("Fred Bloggs");
query.addBindValue(21);
query.exec();
model->setQuery("SELECT * FROM clients ORDER BY clientName");