.update() doesn't work on model_to_dict(model_instance)

[jonathan_livni]

The following doesn't work:

from django.forms import model_to_dict
dict = model_to_dict(model_instance).update({'a':1})

whereas this does:

from django.forms import model_to_dict
dict = model_to_dict(model_instance)
dict.update({'a':1})

[Luke Plant]

"doesn't work" isn't helpful, since we don't know what you expect to happen. I expect the first one to do something different from the second, i.e. the first will end up with dict == None, since the update method of dict instances returns None. And that is what happens. This is Python behaviour, and nothing to do with the Django function model_to_dict.