Software development challenges around index creation for data models

[elfring]

and of course the corresponding interface:

Will your data source provide homogenous items for this model?

[kshegunov]

@elfring said in Software development challenges around index creation for data models:

Will your data source provide homogenous items for this model?

Do you mean the data types? If so, then no, the data types are different for the different columns of the table.

[elfring]

…, the data types are different for the different columns of the table.

Will your data source work without hierarchies then?

[VRonin]

@kshegunov said in Software development challenges around index creation for data models:

QObject::connect(dataSource, &MyDataSource::dataChangeStarted, this, &MyModel::beginResetModel);
QObject::connect(dataSource, &MyDataSource::dataChangeFinished, this, &MyModel::endResetModel);

I know you can do better than this mate! I know you have to create and connect a gazillion signals but at least you don't build everything from scratch

[kshegunov]

@VRonin said in Software development challenges around index creation for data models:

I know you can do better than this mate! I know you have to create and connect a gazillion signals but at least you don't build everything from scratch

Actually I can't in this case. I know you want me to emit the row/columns changed and the ***Inserted/***Deleted signals, but it simply isn't applicable in this particular case.

PS.
Here the data comes from a long JOIN of tables and I'd rather emit modelReset after I had processed all the peculiarities, than to do a fetch from the database on each displayed cell/row.

[kshegunov]

@elfring said in Software development challenges around index creation for data models:

Will your data source work without hierarchies then?

I don't follow. This is a table model, there's no hierarchy here.