Hi!
Interesting solution.
Another possibility if you would like to stick with a class is to
simply define a __call__ method on the class. Of course, this doesn't
have to do anything with RESTfulness.
V
On Aug 26, 3:07 am, zvoase <[EMAIL PROTECTED]> wrote:
> Hey Django users, just a quick suggestion which might help a few
> people.
> I have come up with a way of writing a Django view as a class. I've
> done this as part of an effort to write easier-to-understand RESTful
> apps, as this allows the grouping of similar views as different types
> of operation on a resource. Essentially, the solution goes something
> like this:
>
> * Views have to be callables which return HttpResponse objects.
> * The problem with views as classes is that calling a view class
> returns an instance of the view class, not HttpResponse.
> * Solution: have the VC (view class) a subclass of HttpResponse.
> This way, 'calling' the class will return a HttpResponse instance.
>
> I've written a general class, Resource, which performs a dispatch on
> the request method, so that a resource can be retrieved, created/
> updated and deleted by writing 'get', 'put' and 'delete' methods on a
> subclass of Resource.
>
> A sample resource may look like this:
>
> # CODE START #
>
> class Book(Resource):
> def get(self, request, book_name):
> book = myapp.models.Book.objects.get(name=book_name)
> return render_to_response('book_template.html', {'book':
> book})
>
> def put(self, request, book_name):
> new_book, created = get_or_create(myapp.models.Book,
> name=book_name)
> new_book.data = request.raw_post_data
> if created:
> return HttpResponse(status=201)
> return HttpResponse(status=200)
>
> def delete(self, request, book_name):
> book = myapp.models.Book.objects.get(name=book_name)
> book.delete()
> return HttpResponse()
>
> # CODE END #
>
> You can see how these methods correspond to GET, PUT and DELETE
> request methods, and the dispatch is performed in the __init__ method
> defined in the Resource class. HttpResponse instances can be returned
> from these methods, and their data will be merged with 'self' by
> __init__.
>
> Okay, so here's the code I've written:
>
> # CODE START #
>
> class Resource(HttpResponse):
> def __init__(self, request, *args, **kwargs):
> HttpResponse.__init__(self)
> if hasattr(self, request.method.lower()):
> value = getattr(self,
> request.method.lower())(request, *args,
> **kwargs)
> if isinstance(value, HttpResponse):
> self.update(value)
> elif hasattr(self, 'run'):
> value = self.run(request, *args, **kwargs)
> if isinstance(value, HttpResponse):
> self.update(value)
>
> def update(self, response):
> self._charset = response._charset
> self._is_string = response._is_string
> self._container = response._container
> self._headers.update(response._headers)
> self.cookies.update(response.cookies)
> self.status_code = response.status_code
>
> def render_to_response(self, *args, **kwargs):
> self.update(render_to_response(*args, **kwargs))
>
> # CODE END #
>
> I hope people find this useful.
>
> Regards,
> Zack
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