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author | Florian Apolloner <florian@apolloner.eu> | 2013-02-26 09:53:47 +0100 |
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committer | Florian Apolloner <florian@apolloner.eu> | 2013-02-26 14:36:57 +0100 |
commit | 89f40e36246100df6a11316c31a76712ebc6c501 (patch) | |
tree | 6e65639683ddaf2027908d1ecb1739e0e2ff853b /tests/field_subclassing | |
parent | b3d2ccb5bfbaf6e7fe1f98843baaa48c35a70950 (diff) | |
download | django-89f40e36246100df6a11316c31a76712ebc6c501.tar.gz |
Merged regressiontests and modeltests into the test root.
Diffstat (limited to 'tests/field_subclassing')
-rw-r--r-- | tests/field_subclassing/__init__.py | 0 | ||||
-rw-r--r-- | tests/field_subclassing/fields.py | 74 | ||||
-rw-r--r-- | tests/field_subclassing/models.py | 26 | ||||
-rw-r--r-- | tests/field_subclassing/tests.py | 92 |
4 files changed, 192 insertions, 0 deletions
diff --git a/tests/field_subclassing/__init__.py b/tests/field_subclassing/__init__.py new file mode 100644 index 0000000000..e69de29bb2 --- /dev/null +++ b/tests/field_subclassing/__init__.py diff --git a/tests/field_subclassing/fields.py b/tests/field_subclassing/fields.py new file mode 100644 index 0000000000..a3867e3671 --- /dev/null +++ b/tests/field_subclassing/fields.py @@ -0,0 +1,74 @@ +from __future__ import unicode_literals + +import json + +from django.db import models +from django.utils.encoding import force_text +from django.utils import six +from django.utils.encoding import python_2_unicode_compatible + + +@python_2_unicode_compatible +class Small(object): + """ + A simple class to show that non-trivial Python objects can be used as + attributes. + """ + def __init__(self, first, second): + self.first, self.second = first, second + + def __str__(self): + return '%s%s' % (force_text(self.first), force_text(self.second)) + +class SmallField(six.with_metaclass(models.SubfieldBase, models.Field)): + """ + Turns the "Small" class into a Django field. Because of the similarities + with normal character fields and the fact that Small.__unicode__ does + something sensible, we don't need to implement a lot here. + """ + + def __init__(self, *args, **kwargs): + kwargs['max_length'] = 2 + super(SmallField, self).__init__(*args, **kwargs) + + def get_internal_type(self): + return 'CharField' + + def to_python(self, value): + if isinstance(value, Small): + return value + return Small(value[0], value[1]) + + def get_db_prep_save(self, value, connection): + return six.text_type(value) + + def get_prep_lookup(self, lookup_type, value): + if lookup_type == 'exact': + return force_text(value) + if lookup_type == 'in': + return [force_text(v) for v in value] + if lookup_type == 'isnull': + return [] + raise TypeError('Invalid lookup type: %r' % lookup_type) + +class SmallerField(SmallField): + pass + + +class JSONField(six.with_metaclass(models.SubfieldBase, models.TextField)): + + description = ("JSONField automatically serializes and desializes values to " + "and from JSON.") + + def to_python(self, value): + if not value: + return None + + if isinstance(value, six.string_types): + value = json.loads(value) + return value + + def get_db_prep_save(self, value, connection): + if value is None: + return None + return json.dumps(value) diff --git a/tests/field_subclassing/models.py b/tests/field_subclassing/models.py new file mode 100644 index 0000000000..642573cc83 --- /dev/null +++ b/tests/field_subclassing/models.py @@ -0,0 +1,26 @@ +""" +Tests for field subclassing. +""" + +from __future__ import absolute_import + +from django.db import models +from django.utils.encoding import force_text + +from .fields import SmallField, SmallerField, JSONField +from django.utils.encoding import python_2_unicode_compatible + + +@python_2_unicode_compatible +class MyModel(models.Model): + name = models.CharField(max_length=10) + data = SmallField('small field') + + def __str__(self): + return force_text(self.name) + +class OtherModel(models.Model): + data = SmallerField() + +class DataModel(models.Model): + data = JSONField() diff --git a/tests/field_subclassing/tests.py b/tests/field_subclassing/tests.py new file mode 100644 index 0000000000..9331ff2f3f --- /dev/null +++ b/tests/field_subclassing/tests.py @@ -0,0 +1,92 @@ +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.assertJSONEqual(stream, [{ + "pk": m1.pk, + "model": "field_subclassing.mymodel", + "fields": {"data": "12", "name": "m"} + }]) + + 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), + ordered=False + ) + + 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") |