Editing django-rest-framework serializer object before save

Question

I want to edit a django-rest-framwork serializer object before it is saved. This is how I currently do it -

def upload(request):     if request.method == 'POST':         form = ImageForm(request.POST, request.FILES)         if form.is_valid(): # All validation rules pass              obj = form.save(commit=False)              obj.user_id = 15              obj.save() 

How can I do it with a django-rest-framework serializer object?

@api_view(['POST','GET']) def upload_serializers(request):     if request.method == 'POST':          serializer = FilesSerializer(data=request.DATA, files=request.FILES)          if serializer.is_valid():               serializer.save() 

Answer 1

Now edited for REST framework 3

With REST framework 3 the pattern is now:

if serializer.is_valid():     serializer.save(user_id=15) 

Note that the serializers do not now ever expose an unsaved object instance as serializer.object, however you can inspect the raw validated data as serializer.validated_data.

If you're using the generic views and you want to modify the save behavior you can use the perform_create and/or perform_update hooks...

def perform_create(self, serializer):     serializer.save(user_id=15)