Hi,I am looking for a code snippet in PyQGIS: how can I change the filter expression for a value relation widget?
Technically, the widget seems to be a QComboBox. I can get access to the combobox, e.g. to get the current value - but how can I access the QGIS related functionality, like changing programmatically settings of the value relation widget , such as the filter expression? I found the QgsValueRelationFieldFormatter object, but it doesn't allow me to change the filter expression. Any idea how I would change the filter expression using Python?
Thank you for any hints, Andreas
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