Add validation in QueryDict.get()

[CHI Cheng]

Hi,

I'd like to suggest a new parameter in QueryDict.get() named pattern.

p = request.GET.get(key='q', default='10', pattern=r'^\d+$')

As it is submitted by user, the value of parameter q could be any characters. But I only need a non-negative number, so I add a new pattern parameter for QueryDict.get(), if the value does not match the pattern, then get() will return default value, as '10' in example, but not the value submitted by user.

If you love this tiny feature I could prepare a patch. (I think it only requires less than 10 lines of codes and dozens of lines of test codes?)

[Tim Graham]

Thank-you for the suggestion, however, I don't think this type of logic/validation should be part of QueryDict (it seems like something you may want to use the forms abstraction for).