Validate review returns the right content type

[moumoutte]

Review

This PR closes #257

• Rebase from master
• Add Changelog entry.

[brunobord]

Looking ok, although, please:

• You must rebase your PR from master,
• And then, you'll be able to add an entry to the Changelog.

[brunobord]

this branch is on hold, and will be merged targetting the 1.0.1 release

[brunobord]

You're clear to rebase (again, sorry), now that the 1.0.0 has been released

[brunobord]

You still need to add an item to the changelog, please.

[moumoutte]

Done

[wo0dyn]

Nitpick: I think we can only return the reference of the exception here raise exceptions.NotFound, not an instance.

[moumoutte]

I don't mind , just want to know why a thing is better than another :)

[wo0dyn]

Dunno. I've always told that if you're not passing any argument to the exception's constructor, then there is no point of raising an instance, but a reference to the exception class suffice. It was a nitpick anyway. We can leave it as is 😉

[moumoutte]

Finally, I think the code is actually transforming the class to an instance automatically.
In the final exception handler, we can see something like this:

https://github.com/encode/django-rest-framework/blob/master/rest_framework/views.py#L433

But, isinstance does not work on class itself.

In [3]: class C:
   ...:     pass
   ...: 

In [4]: isinstance(C(), C)
Out[4]: True

In [5]: isinstance(C, C)
Out[5]: False

So I guess, something in the code, the class is automatically instanciated.

Same thing for the default exception_handler

https://github.com/encode/django-rest-framework/blob/master/rest_framework/views.py#L58

[wo0dyn]

LGTM.