#16074: Class-based views clash get_context_data
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Reporter: emyller | Owner: nobody
Type: Bug | Status: new
Milestone: | Component: Generic views
Version: 1.3 | Severity: Normal
Resolution: | Keywords: cbv
Triage Stage: Accepted | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
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Comment (by lukeplant):
Having looked at [http://rhettinger.wordpress.com/2011/05/26/super-
considered-super/ this article], I think a better way to do this is to add
the `super()` calls, but for every class that defines `get_context_data`
and currently inherits from `object`, make it inherit from a base class
like this instead:
{{{
#!python
class GetContextDataRoot(object):
def get_context_data(self):
return {}
}}}
It doesn't actually have to be the same base class in each case, it just
needs this method, and no other functionality that might be wanted for
other reasons. The existence of a base class like this means that:
1. It doesn't get into problems calling `get_context_data` on object.
2. The use of `super()` means that other classes can be inserted into the
MRO, so no data gets lost.
So, if we have `SubClass1` and `SubClass2` that both inherit from
`GetContextDataRoot` (or an equivalent class), and use super(), and then I
write my own that inherits from both `SubClass1` and `SubClass2`, I get an
MRO like this:
`MyClass` -> `SubClass1` -> `SubClass2` -> `GetContextDataRoot`
Which is what I want.
--
Ticket URL: <https://code.djangoproject.com/ticket/16074#comment:4>
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