mirror of
https://github.com/django/django.git
synced 2025-03-26 09:10:50 +00:00
3e52fd7595
Thanks Simon Charette and Tim Graham for the review and Carlos E. C. Leite for the report. Backport of f79d9a322c6008e5fada1453aebfb56afc316cc8 from master
108 lines
4.4 KiB
Python
108 lines
4.4 KiB
Python
from django.db import models
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from django.test import SimpleTestCase
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from django.test.utils import isolate_apps
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from .models import Book, ChildModel1, ChildModel2
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class IndexesTests(SimpleTestCase):
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def test_suffix(self):
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self.assertEqual(models.Index.suffix, 'idx')
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def test_repr(self):
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index = models.Index(fields=['title'])
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multi_col_index = models.Index(fields=['title', 'author'])
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self.assertEqual(repr(index), "<Index: fields='title'>")
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self.assertEqual(repr(multi_col_index), "<Index: fields='title, author'>")
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def test_eq(self):
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index = models.Index(fields=['title'])
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same_index = models.Index(fields=['title'])
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another_index = models.Index(fields=['title', 'author'])
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index.model = Book
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same_index.model = Book
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another_index.model = Book
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self.assertEqual(index, same_index)
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self.assertNotEqual(index, another_index)
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def test_index_fields_type(self):
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with self.assertRaisesMessage(ValueError, 'Index.fields must be a list.'):
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models.Index(fields='title')
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def test_raises_error_without_field(self):
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msg = 'At least one field is required to define an index.'
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with self.assertRaisesMessage(ValueError, msg):
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models.Index()
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def test_max_name_length(self):
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msg = 'Index names cannot be longer than 30 characters.'
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with self.assertRaisesMessage(ValueError, msg):
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models.Index(fields=['title'], name='looooooooooooong_index_name_idx')
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def test_name_constraints(self):
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msg = 'Index names cannot start with an underscore (_).'
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with self.assertRaisesMessage(ValueError, msg):
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models.Index(fields=['title'], name='_name_starting_with_underscore')
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msg = 'Index names cannot start with a number (0-9).'
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with self.assertRaisesMessage(ValueError, msg):
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models.Index(fields=['title'], name='5name_starting_with_number')
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def test_name_auto_generation(self):
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index = models.Index(fields=['author'])
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index.set_name_with_model(Book)
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self.assertEqual(index.name, 'model_index_author_0f5565_idx')
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# '-' for DESC columns should be accounted for in the index name.
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index = models.Index(fields=['-author'])
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index.set_name_with_model(Book)
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self.assertEqual(index.name, 'model_index_author_708765_idx')
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# fields may be truncated in the name. db_column is used for naming.
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long_field_index = models.Index(fields=['pages'])
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long_field_index.set_name_with_model(Book)
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self.assertEqual(long_field_index.name, 'model_index_page_co_69235a_idx')
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# suffix can't be longer than 3 characters.
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long_field_index.suffix = 'suff'
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msg = 'Index too long for multiple database support. Is self.suffix longer than 3 characters?'
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with self.assertRaisesMessage(AssertionError, msg):
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long_field_index.set_name_with_model(Book)
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@isolate_apps('model_indexes')
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def test_name_auto_generation_with_quoted_db_table(self):
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class QuotedDbTable(models.Model):
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name = models.CharField(max_length=50)
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class Meta:
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db_table = '"t_quoted"'
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index = models.Index(fields=['name'])
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index.set_name_with_model(QuotedDbTable)
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self.assertEqual(index.name, 't_quoted_name_e4ed1b_idx')
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def test_deconstruction(self):
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index = models.Index(fields=['title'])
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index.set_name_with_model(Book)
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path, args, kwargs = index.deconstruct()
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self.assertEqual(path, 'django.db.models.Index')
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self.assertEqual(args, ())
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self.assertEqual(kwargs, {'fields': ['title'], 'name': 'model_index_title_196f42_idx'})
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def test_clone(self):
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index = models.Index(fields=['title'])
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new_index = index.clone()
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self.assertIsNot(index, new_index)
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self.assertEqual(index.fields, new_index.fields)
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def test_name_set(self):
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index_names = [index.name for index in Book._meta.indexes]
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self.assertCountEqual(index_names, ['model_index_title_196f42_idx', 'model_index_isbn_34f975_idx'])
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def test_abstract_children(self):
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index_names = [index.name for index in ChildModel1._meta.indexes]
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self.assertEqual(index_names, ['model_index_name_440998_idx'])
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index_names = [index.name for index in ChildModel2._meta.indexes]
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self.assertEqual(index_names, ['model_index_name_b6c374_idx'])
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