#12891: wishlist: allow .dates() query to span relations
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Reporter: til | Owner: nobody
Status: new | Milestone:
Component: Database layer (models, ORM) | Version: 1.2-beta
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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At the moment, the dates() query only accepts field parameters that do not
span relations. It would be nice if support for more complex cases was
added, so that a query like this would be possible:
{{{
queryset.dates('foreignkey__date', 'year')
}}}
I currently use the following hack to work around this:
{{{
# check if date_field spans relations
fields = date_field.split('__')
for field in fields[:-1]:
relation_field = getattr(queryset.model, field)
queryset = relation_field.field.rel.to.objects.all()
dates = queryset.dates(fields[-1], 'year')
}}}
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Ticket URL: <http://code.djangoproject.com/ticket/12891>
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