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5ed20b3aa3
Allows model fields to override the descriptor class used on the model instance attribute.
35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
from django.db import connection, models
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from django.test import SimpleTestCase
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from .fields import CustomDescriptorField, CustomTypedField
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class TestDbType(SimpleTestCase):
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def test_db_parameters_respects_db_type(self):
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f = CustomTypedField()
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self.assertEqual(f.db_parameters(connection)['type'], 'custom_field')
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class DescriptorClassTest(SimpleTestCase):
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def test_descriptor_class(self):
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class CustomDescriptorModel(models.Model):
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name = CustomDescriptorField(max_length=32)
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m = CustomDescriptorModel()
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self.assertFalse(hasattr(m, '_name_get_count'))
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# The field is set to its default in the model constructor.
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self.assertEqual(m._name_set_count, 1)
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m.name = 'foo'
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self.assertFalse(hasattr(m, '_name_get_count'))
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self.assertEqual(m._name_set_count, 2)
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self.assertEqual(m.name, 'foo')
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self.assertEqual(m._name_get_count, 1)
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self.assertEqual(m._name_set_count, 2)
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m.name = 'bar'
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self.assertEqual(m._name_get_count, 1)
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self.assertEqual(m._name_set_count, 3)
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self.assertEqual(m.name, 'bar')
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self.assertEqual(m._name_get_count, 2)
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self.assertEqual(m._name_set_count, 3)
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