[Qt-interest] How to get an ID for a description selected in a QComboBox?

[Marcelo Magno T. Sales]

Hello,

In a form, I have a QTableView which uses a QSqlTableModel. This model 
should be filtered to select only those rows where the ID field matches 
a value selected by the user in a QComboBox in this form. However, the 
ID is a FK to another table. In the QComboBox, which uses a model with 
two columns (ID and description), the displayed values are the 
descriptions from that other table. When the user selects a description 
in the QComboBox, I must be able to get its ID to set the filter to the 
QTableView's model. What's the best approach to achieve this? I couldn't 
find a way to get the value of the ID for the selected description, nor 
to get the model index for the selected value in the QComboBox.

Thanks,

Marcelo