mirror of
https://github.com/django/django.git
synced 2024-12-25 02:26:12 +00:00
a8a81aae20
Generic cleanup and dead code removal in deferred model field loading and model.__reduce__(). Also fixed an issue where if an inherited model with a parent field chain parent_ptr_id -> id would be deferred loaded, then accessing the id field caused caused a database query, even if the id field's value is already loaded in the parent_ptr_id field.
88 lines
3.0 KiB
Python
88 lines
3.0 KiB
Python
from __future__ import absolute_import
|
|
|
|
from django.core import serializers
|
|
from django.test import TestCase
|
|
|
|
from .fields import Small
|
|
from .models import DataModel, MyModel, OtherModel
|
|
|
|
|
|
class CustomField(TestCase):
|
|
def test_defer(self):
|
|
d = DataModel.objects.create(data=[1, 2, 3])
|
|
|
|
self.assertTrue(isinstance(d.data, list))
|
|
|
|
d = DataModel.objects.get(pk=d.pk)
|
|
self.assertTrue(isinstance(d.data, list))
|
|
self.assertEqual(d.data, [1, 2, 3])
|
|
|
|
d = DataModel.objects.defer("data").get(pk=d.pk)
|
|
self.assertTrue(isinstance(d.data, list))
|
|
self.assertEqual(d.data, [1, 2, 3])
|
|
# Refetch for save
|
|
d = DataModel.objects.defer("data").get(pk=d.pk)
|
|
d.save()
|
|
|
|
d = DataModel.objects.get(pk=d.pk)
|
|
self.assertTrue(isinstance(d.data, list))
|
|
self.assertEqual(d.data, [1, 2, 3])
|
|
|
|
def test_custom_field(self):
|
|
# Creating a model with custom fields is done as per normal.
|
|
s = Small(1, 2)
|
|
self.assertEqual(str(s), "12")
|
|
|
|
m = MyModel.objects.create(name="m", data=s)
|
|
# Custom fields still have normal field's attributes.
|
|
self.assertEqual(m._meta.get_field("data").verbose_name, "small field")
|
|
|
|
# The m.data attribute has been initialised correctly. It's a Small
|
|
# object.
|
|
self.assertEqual((m.data.first, m.data.second), (1, 2))
|
|
|
|
# The data loads back from the database correctly and 'data' has the
|
|
# right type.
|
|
m1 = MyModel.objects.get(pk=m.pk)
|
|
self.assertTrue(isinstance(m1.data, Small))
|
|
self.assertEqual(str(m1.data), "12")
|
|
|
|
# We can do normal filtering on the custom field (and will get an error
|
|
# when we use a lookup type that does not make sense).
|
|
s1 = Small(1, 3)
|
|
s2 = Small("a", "b")
|
|
self.assertQuerysetEqual(
|
|
MyModel.objects.filter(data__in=[s, s1, s2]), [
|
|
"m",
|
|
],
|
|
lambda m: m.name,
|
|
)
|
|
self.assertRaises(TypeError, lambda: MyModel.objects.filter(data__lt=s))
|
|
|
|
# Serialization works, too.
|
|
stream = serializers.serialize("json", MyModel.objects.all())
|
|
self.assertEqual(stream, '[{"pk": %d, "model": "field_subclassing.mymodel", "fields": {"data": "12", "name": "m"}}]' % m1.pk)
|
|
|
|
obj = list(serializers.deserialize("json", stream))[0]
|
|
self.assertEqual(obj.object, m)
|
|
|
|
# Test retrieving custom field data
|
|
m.delete()
|
|
|
|
m1 = MyModel.objects.create(name="1", data=Small(1, 2))
|
|
m2 = MyModel.objects.create(name="2", data=Small(2, 3))
|
|
|
|
self.assertQuerysetEqual(
|
|
MyModel.objects.all(), [
|
|
"12",
|
|
"23",
|
|
],
|
|
lambda m: str(m.data)
|
|
)
|
|
|
|
def test_field_subclassing(self):
|
|
o = OtherModel.objects.create(data=Small("a", "b"))
|
|
o = OtherModel.objects.get()
|
|
self.assertEqual(o.data.first, "a")
|
|
self.assertEqual(o.data.second, "b")
|