For my attribute table I created a custom form in Qt Designer. The table has a date field and a time field.
In Qt Designer there are widgets for entering date and time but what data type is expected for the fields in my attribute table in QGIS?
The values always stays NULL in every case, when I choose date, datetime or text. Under Layer properties when I choose the edit widget "calendar" there is a calendar popup even when I use my custom form.