Add the necessary return value for Form#clean (in 1.6)

[jameydeorio]

The documentation for Form and field validation (​https://docs.djangoproject.com/en/1.6/ref/forms/validation/#cleaning-and-validating-fields-that-depend-on-each-other) says nothing about returning self.cleaned_data, without which you receive the obtuse "argument of type 'NoneType' is not iterable" along with an unhelpful stack trace, and you wind up on StackOverflow instead of the docs to solve the issue.

[Baptiste Mispelon]

Hi,

In the link you provided, the example code has these two lines at the bottom:

# Always return the full collection of cleaned data.
return cleaned_data

Is that not sufficient?

Note that if you're reading the documentation for 1.7 [1], these lines are gone because it's not necessary to return cleaned_data from Form.clean() anymore.
Was that the source of the confusion?

[1] ​https://docs.djangoproject.com/en/1.7/ref/forms/validation/#cleaning-and-validating-fields-that-depend-on-each-other