View examples

example_views.py

def create(request): # django.views.generic.CreateView
    """Create a new model object and save it to the database."""
    if request.method == 'post':
        form = ModelFormClass(request.POST)
        if form.isvalid():
            form.save()
            return redirect(...)
    else:
        form = ModelFormClass()
    return render('your_template.html', {'form': form})


def update(request, object_id): # django.views.generic.UpdateView
    """Update an existing model object and save it to the database."""
    object = get_object_or_404(YourModel, pk=object_id)
    if request.method == 'post':
        form = ModelFormClass(request.POST, instance=object)
        if form.isvalid():
            form.save()
            return redirect(...)
    else:
        form = ModelFormClass(instance=object)
    return render('your_template.html', {'object': object, 'form': form})


def delete(request, object_id): # django.views.generic.DeleteView
    """Delete an existing object from the database, asking for a confirmation before."""
    object = get_object_or_404(YourModel, pk=object_id)
    if request.method == 'post':
        object.delete()
        return redirect(...)
    return render('confirmation.html', {'object': object})


def create_with_linked_object(request, linked_object_id):
    """Create a new model that's linked to an existing instance."""
    linked_object = get_object_or_404(YourLinkedModel, pk=linked_object_id)
    if request.method == 'post':
        form = LinkedModelForm(request.POST)
        if form.is_valid():
            # creates a new instance without saving it to the db
            new_object = form.save(commit=False)
            new_object.linked_field = linked_object
            new_object.save()
            return redirect()
    else:
        form = LinkedModelForm()
    return render('your_template.html', {'form': form, 'linked_object': linked_object})

forms.py

class LinkedModelForm(forms.ModelForm):
    class Meta:
        model = YourModel
        fields = ['foo', 'bar', 'baz'] # everything except the FK field
        # You could also use exclude = ['quux'] but i wouldnt recommend it