[Qt-interest] Open database in constructor?

[Israel Brewster]

Is it not possible to open a database connection in the constructor of  
a class (QMainWindow based, in this case) and have it work? I tried  
adding the following lines of code to the constructor of my class:

  QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName("xxxxx");
if(!db.open())
{
QMessageBox::critical(this, tr("Datastore"),
"Unable to open database!");
return;
}
dataModel.setTable("yyy");
if (dataModel.lastError().isValid())
{
...

In this case, I always get a "could not find table yyy" error.  
However, if I take the database opening code and put it before the  
constructor (i.e. just before instantiating my object) without  
changing any of the code, it works perfectly- albeit with the  
requirement of a lot of code duplication, as there are several places  
I could be opening this from. Thus the reason I just want to put it in  
the constructor. Am I doing something wrong here? Or is this just not  
possible? Thanks.
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Israel Brewster
Computer Support Technician
Frontier Flying Service Inc.
5245 Airport Industrial Rd
Fairbanks, AK 99709
(907) 450-7250 x293
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