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"""
Tests for defer() and only().
"""
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
class Secondary(models.Model):
first = models.CharField(max_length=50)
second = models.CharField(max_length=50)
@python_2_unicode_compatible
class Primary(models.Model):
name = models.CharField(max_length=50)
value = models.CharField(max_length=50)
related = models.ForeignKey(Secondary, models.CASCADE)
def __str__(self):
return self.name
class Child(Primary):
pass
class BigChild(Primary):
other = models.CharField(max_length=50)
class ChildProxy(Child):
class Meta:
proxy = True
class RefreshPrimaryProxy(Primary):
class Meta:
proxy = True
def refresh_from_db(self, using=None, fields=None, **kwargs):
# Reloads all deferred fields if any of the fields is deferred.
if fields is not None:
fields = set(fields)
deferred_fields = self.get_deferred_fields()
if fields.intersection(deferred_fields):
fields = fields.union(deferred_fields)
super(RefreshPrimaryProxy, self).refresh_from_db(using, fields, **kwargs)
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