Serializer data property does not update on PUT and displays initial values

[tobiaz]

When doing the following:

def put(self, request, pk, format=None):
        event = self.get_event(request, pk)
        event_serializer = CalendarEventSerializer(event, data=request.data, partial=True)

        if event_serializer.is_valid():
            event_serializer.save()
            return Response(event_serializer.data)

Reponse returns dict that does not show updated data. I had to do this for a workaround to make sure data is updated.

event_serializer._data = event_serializer.to_representation(event_serializer.instance)

I've tried tracing down the issue but can't seem to find it. The _date seems to be using is_initial values as everything else is correct within the serializer instance.

[carltongibson]

I'm going to close this for now as I suspect you're accessing data somewhere during validation — or such. The bottom line will be "Don't do this". data is populated on demand so if you don't call it early you'll get the post-save values you're after.

See: #2532, #2276, #2289 and probably others for extended discussion of this topic.

If there's something not covered there please come back here with what we need to reproduce the issue — ideally a failing test case — and we can re-open.

[tobiaz]

Thank you for the feedback. You're correct, I was accessing data instead of initial data, apologies. As a side note: this project is one of the best I've ever used, thank you!!!