#3746: Add a wildcard object for use in objects.filter queries.
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Reporter: [EMAIL PROTECTED] | Owner: adrian
Status: new | Component: Database wrapper
Version: SVN | Keywords: wildcard filter query
Stage: Unreviewed | Has_patch: 0
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Advantage: Greatly simplify a common usage with no breakage of old code,
while making code more pythonic.
There should be a wildcard object to pass with keyword params to filter(),
such that any keyword param is ignored which equals this wildcard object.
This should not break any existing code.
Examples:
def people_report(request, **kw):
for key in ('name', 'occupation'):
query_params = {}
if if key in kw and kw[key] != None:
query_params[key] = kw[key]
people = Person.objects.filter(**query_params)
...
#COMPARED TO
def people_report(request, name=WILDCARD, occupation=WILDCARD):
people = Person.objects.filter(name=name, occupation=occupation)
...
#Implementation:
change django.db.models.manager.filter from:
def filter(self, *args, **kwargs):
return self.get_query_set().filter(*args, **kwargs)
TO:
def filter(self, *args, **kwargs):
for key in kwargs:
if kwargs[key] == django.db.models.manager.WILDCARD:
del kwargs[key]
return self.get_query_set().filter(*args, **kwargs)
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Ticket URL: <http://code.djangoproject.com/ticket/3746>
Django Code <http://code.djangoproject.com/>
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