| 1 | @skipUnlessDBFeature('supports_foreign_keys') |
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| 2 | def test_alter_field_reloads_state_on_fk_with_to_field_target_type_change(self): |
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| 3 | app_label = 'test_alflrsfkwtflttc' |
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| 4 | project_state = self.apply_operations(app_label, ProjectState(), operations=[ |
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| 5 | migrations.CreateModel('Rider', fields=[ |
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| 6 | ('id', models.AutoField(primary_key=True)), |
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| 7 | ('code', models.PositiveIntegerField(unique=True)), |
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| 8 | ]), |
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| 9 | migrations.CreateModel('Pony', fields=[ |
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| 10 | ('id', models.AutoField(primary_key=True)), |
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| 11 | ('rider', models.ForeignKey('%s.Rider' % app_label, models.CASCADE, to_field='code')), |
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| 12 | ]), |
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| 13 | ]) |
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| 14 | operation = migrations.AlterField( |
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| 15 | 'Rider', |
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| 16 | 'code', |
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| 17 | models.CharField(max_length=100, unique=True), |
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| 18 | ) |
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| 19 | self.apply_operations(app_label, project_state, operations=[operation]) |
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| 20 | id_type, id_null = [ |
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| 21 | (c.type_code, c.null_ok) |
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| 22 | for c in self.get_table_description('test_alflrsfkwtflttc_rider') |
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| 23 | if c.name == 'code' |
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| 24 | ][0] |
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| 25 | fk_type, fk_null = [ |
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| 26 | (c.type_code, c.null_ok) |
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| 27 | for c in self.get_table_description('test_alflrsfkwtflttc_pony') |
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| 28 | if c.name == 'rider_id' |
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| 29 | ][0] |
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| 30 | self.assertEqual(id_type, fk_type) |
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| 31 | self.assertEqual(id_null, fk_null) |
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