hability to use OR in filterspecs

[Fabián Ezequiel Gallina]

Currently when creating filterspecs we only can combine several rules using AND only.

This patch adds the hability to use OR in the query.

Why this could be useful? ¶

Suppose we have a Taxes model which contains a due_date field and a payed_date field and we want to filter the non due taxes.

So non due taxes would be:

Q(due_date__gt=datetime.date.today()) | Q(payed_date__is_null=False)

How we do that? ¶

When creating a filterspec prepend the value of FILTERSPEC_OR_PREFIX (the value in the patch is '__or__') to your fields like this:

[...]

        self.links = (
            (_('Non Due'), {'%s__gte' % self.field.name: str(today.date()),
                              '__or__payed_date__isnull' : 'False'}),
        )

[...]

PD: I also fixed a little typo in the line 208 (comment)

[Fabián Ezequiel Gallina]

first proposal to support OR in filterspecs

[Russell Keith-Magee]

#5833 covers a much broader range of improvements for filterspecs.