qsqltablemodel "order by" clause in setfilter?

[jtdavidson]

I've been using an "Order By" clause in qsqltablemodel::setfilter, because i need to sort a table by two columns, and as far as I can tell qsqltablemodel::setSort only allows you to sort by one column.
Order By *does* work in setFilter, but is it supported? I've never seen it in the documentation. I ask because, if I assign to a qtableview a qsqltablemodel model that has an order by clause in its filter, and if that view has sorting enabled, then resorting using the view's sort function produces an empty view.
So I'm guessing that I shouldn't be using Order By in setFilter? Is there some other way to sort a tablemodel by 2 columns? I can't use a querymodel because they are read only, and I need to write to the sorted table.

thanks

John

[saa7_go]

maybe, you can do like following


model->setTable("tablename");
model->setFilter("1=1 ORDER BY col1 ASC, col2 DESC");
model->select();

[ChrisW67]

You could create your own writeable model derived from QSqlQueryModel. An example is in the "Query Model Example" you can find in Assistant (and the QSqlQueryModel docs).

You don't say why you want the rows returned in sorted order or how big the data set is. If the size is manageable and the sort is for display purposes then a customised QSortFilterProxyModel might be of use.

[jtdavidson]

That's what I am doing, but that breaks if it's on a table view that performs its own sort when the user clicks on a sort arrow in the horizontal header row: the model returns an empty set, rather than a sorted set.

[jtdavidson]

Sorry, that previous post was in reference to:


maybe, you can do like following

model->setTable("tablename");
model->setFilter("1=1 ORDER BY col1 ASC, col2 DESC");
model->select();

[waynew]

You can always do this: view->setSortingEnabled(FALSE);

To disable user sorting.