Get saved object of a model form in Django?

Question

I just want to access model details just after posting it with model form in Django. This guy also had asked the same thing but when i try the accepted answer, it returns none type value.

Here is my code in 'views.py':

if request.method == 'POST':
    if request.user.is_authenticated():
        form = PostStoryForm(request.POST)
        if form.is_valid():
            obj = form.save(commit=False)
            obj.author = request.user
            new_post = obj.save()
            print(new_post)

The Code above saves the form to the database successfully but 'new_post' variable is 'None'. For example when i tried to access 'new_post.title' which is a field in my model, it returns 'AttributeError' which says 'NoneType' object has no attribute 'title'

what am i doing wrong?

Answer 1

The models save() method does not return the instance

obj.author = request.user
obj.save() # this does not return anything. It just saves the instance it is called on.

Your instance already has the author set.

To access auto populated fields that haven't been set yet, you will have to fetch it from the database again after saving. This is the case, when the instance you called save() on did not already exist before.

new_obj = MyModel.objects.get(id=obj.id)