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Added a test for defer() / only() to make sure saving continues to work. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10092 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Malcolm Tredinnick 2009-03-19 22:46:28 +00:00
parent 014b961509
commit 466198c4d9
1 changed files with 13 additions and 0 deletions
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13
tests/modeltests/defer/models.py
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@ -14,6 +14,9 @@ class Primary(models.Model):
value = models.CharField(max_length=50) value = models.CharField(max_length=50)
related = models.ForeignKey(Secondary) related = models.ForeignKey(Secondary)
def __unicode__(self):
return self.name
def count_delayed_fields(obj, debug=False): def count_delayed_fields(obj, debug=False):
""" """
Returns the number of delayed attributes on the given model instance. Returns the number of delayed attributes on the given model instance.
@ -86,4 +89,14 @@ Using defer() and only() with get() is also valid.
# KNOWN NOT TO WORK: >>> count_delayed_fields(qs.only('name').select_related('related')[0]) # KNOWN NOT TO WORK: >>> count_delayed_fields(qs.only('name').select_related('related')[0])
# KNOWN NOT TO WORK >>> count_delayed_fields(qs.defer('related').select_related('related')[0]) # KNOWN NOT TO WORK >>> count_delayed_fields(qs.defer('related').select_related('related')[0])
# Saving models with deferred fields is possible (but inefficient, since every
# field has to be retrieved first).
>>> obj = Primary.objects.defer("value").get(name="p1")
>>> obj.name = "a new name"
>>> obj.save()
>>> Primary.objects.all()
[<Primary: a new name>]
"""} """}