-
-
Notifications
You must be signed in to change notification settings - Fork 31.6k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Fixed deferred loading of fields with default values.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@10113 bcc190cf-cafb-0310-a4f2-bffc1f526a37
- Loading branch information
Showing
3 changed files
with
54 additions
and
7 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Empty file.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,47 @@ | ||
""" | ||
Regression tests for defer() / only() behavior. | ||
""" | ||
|
||
from django.conf import settings | ||
from django.db import connection, models | ||
|
||
class Item(models.Model): | ||
name = models.CharField(max_length=10) | ||
text = models.TextField(default="xyzzy") | ||
value = models.IntegerField() | ||
other_value = models.IntegerField(default=0) | ||
|
||
def __unicode__(self): | ||
return self.name | ||
|
||
__test__ = {"regression_tests": """ | ||
Deferred fields should really be deferred and not accidentally use the field's | ||
default value just because they aren't passed to __init__. | ||
>>> settings.DEBUG = True | ||
>>> _ = Item.objects.create(name="first", value=42) | ||
>>> obj = Item.objects.only("name", "other_value").get(name="first") | ||
# Accessing "name" doesn't trigger a new database query. Accessing "value" or | ||
# "text" should. | ||
>>> num = len(connection.queries) | ||
>>> obj.name | ||
u"first" | ||
>>> obj.other_value | ||
0 | ||
>>> len(connection.queries) == num | ||
True | ||
>>> obj.value | ||
42 | ||
>>> len(connection.queries) == num + 1 # Effect of values lookup. | ||
True | ||
>>> obj.text | ||
u"xyzzy" | ||
>>> len(connection.queries) == num + 2 # Effect of text lookup. | ||
True | ||
>>> settings.DEBUG = False | ||
""" | ||
} | ||
|