I would like to make programmatically (with Python) the same thing than we can do directly in QGIS when you create a list of values for a field.
I would like to create a new field and specify a list of possible values for this field. I didn't find any function for that in the API. Is there anyone who has the solution?
You need to assign and configure a ValueMap widget to your layer's field in this way:
fieldIndex = layer.fields().indexFromName( 'myField' )
editor_widget_setup = QgsEditorWidgetSetup( 'ValueMap', {
'map': {'Description 1': 'value1',
'Description 2': 'value2'}
}
)
layer.setEditorWidgetSetup( fieldIndex, editor_widget_setup )
fieldIndex = layer.fieldNameIndex( 'myField' )
layer.setEditorWidgetV2( fieldIndex, 'ValueMap' )
values = {u'Description 1': u'value1',
u'Description 2': u'value2',
u'Description 3': u'value3'}
layer.setEditorWidgetV2Config( fieldIndex, values )
setEditorWidgetV2Config(...) works, but I get a deprecation warning, are there other approaches?
.qgis2\python\expressions instead of value1 ?