author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Wed, 27 May 2009 01:47:38 +0200 | |
changeset 2360 | e389d26949db |
parent 109 | 620f9b141567 |
permissions | -rwxr-xr-x |
109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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from django.db import models |
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class Poll(models.Model): |
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question = models.CharField(maxlength=200) |
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def __str__(self): |
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return "Q: %s " % self.question |
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class Choice(models.Model): |
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poll = models.ForeignKey(Poll) |
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choice = models.CharField(maxlength=200) |
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def __str__(self): |
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return "Choice: %s in poll %s" % (self.choice, self.poll) |
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__test__ = {'API_TESTS':""" |
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# Regression test for the use of None as a query value. None is interpreted as |
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# an SQL NULL, but only in __exact queries. |
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# Set up some initial polls and choices |
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>>> p1 = Poll(question='Why?') |
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>>> p1.save() |
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>>> c1 = Choice(poll=p1, choice='Because.') |
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>>> c1.save() |
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>>> c2 = Choice(poll=p1, choice='Why Not?') |
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>>> c2.save() |
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# Exact query with value None returns nothing (=NULL in sql) |
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>>> Choice.objects.filter(id__exact=None) |
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[] |
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# Valid query, but fails because foo isn't a keyword |
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>>> Choice.objects.filter(foo__exact=None) |
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Traceback (most recent call last): |
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... |
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TypeError: Cannot resolve keyword 'foo' into field |
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# Can't use None on anything other than __exact |
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>>> Choice.objects.filter(id__gt=None) |
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Traceback (most recent call last): |
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... |
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ValueError: Cannot use None as a query value |
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# Can't use None on anything other than __exact |
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>>> Choice.objects.filter(foo__gt=None) |
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Traceback (most recent call last): |
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... |
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ValueError: Cannot use None as a query value |
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# Related managers use __exact=None implicitly if the object hasn't been saved. |
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>>> p2 = Poll(question="How?") |
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>>> p2.choice_set.all() |
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[] |
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"""} |