Concept of partial views to be resolved from other views or template tags

Hi all,

I am wondering if the following is considered a bad practice and might lead to issues. I think it provides a useful pattern, for example for creating template tags or simple ajax use cases where the rendered result of a partial will get frequently updated.

# partials.py
class SomePartial(View):
    """ A view providing partial content. """
    def get(self, request):
        # related views logic like lookups ...
        return render(request, 'patterntests/_partial.html', {})

# views.py
class SomeView(View):
    """ Including the partial by calling get on `SomePartial`. """
    def get(self, request):
        someview = SomePartial()
        res = someview.get(request)
        ctx = {
            'partial_content': mark_safe(res.content)
        }
        return render(request, 'patterntests/test.html', ctx)


class AnotherView(View):
    """ Including the partial by resolving its view. """
    def get(self, request):
        rev = reverse('patterntests:somepartial')
        view, vargs, vkwargs = resolve(rev)
        vkwargs['request'] = request
        res = view(*vargs, **vkwargs)

        ctx = {
            'partial_content': mark_safe(res.content)
        }

        return render(request, 'patterntests/test.html', ctx)

My main question is about the following two lines in SomeView. Does that have serious flaws (edge cases, performance, security)?

class SomeView(View):
    def get(self, request):
        # ...
        someview = SomePartial()
        res = someview.get(request)
        # ...

I like that approach because it leads to any partial being a separated piece of logic that can be tested and developed on a dedicated url. If necessary it can be wrapped in a templatetag, which makes it easy to use from the template layer. On top of that, by implementing something like a format='json|html|xml|...' attribute it could be further improved to allow for more advanced ajax use cases. However, since I've not seen it being used that way I think that this might be for a good reason. (-:

Would appreciate your feedback,

Regards,

Stephan

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