mirror of https://github.com/django/django.git
63 lines
2.5 KiB
Python
63 lines
2.5 KiB
Python
from django.db import models
|
|
from django.test import TestCase
|
|
|
|
from .models import Book
|
|
|
|
|
|
class IndexesTests(TestCase):
|
|
|
|
def test_repr(self):
|
|
index = models.Index(fields=['title'])
|
|
multi_col_index = models.Index(fields=['title', 'author'])
|
|
self.assertEqual(repr(index), "<Index: fields='title'>")
|
|
self.assertEqual(repr(multi_col_index), "<Index: fields='title, author'>")
|
|
|
|
def test_eq(self):
|
|
index = models.Index(fields=['title'])
|
|
same_index = models.Index(fields=['title'])
|
|
another_index = models.Index(fields=['title', 'author'])
|
|
self.assertEqual(index, same_index)
|
|
self.assertNotEqual(index, another_index)
|
|
|
|
def test_raises_error_without_field(self):
|
|
msg = 'At least one field is required to define an index.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.Index()
|
|
|
|
def test_max_name_length(self):
|
|
msg = 'Index names cannot be longer than 30 characters.'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.Index(fields=['title'], name='looooooooooooong_index_name_idx')
|
|
|
|
def test_name_constraints(self):
|
|
msg = 'Index names cannot start with an underscore (_).'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.Index(fields=['title'], name='_name_starting_with_underscore')
|
|
|
|
msg = 'Index names cannot start with a number (0-9).'
|
|
with self.assertRaisesMessage(ValueError, msg):
|
|
models.Index(fields=['title'], name='5name_starting_with_number')
|
|
|
|
def test_name_auto_generation(self):
|
|
index = models.Index(fields=['author'])
|
|
index.model = Book
|
|
self.assertEqual(index.name, 'model_index_author_0f5565_idx')
|
|
|
|
# fields may be truncated in the name. db_column is used for naming.
|
|
long_field_index = models.Index(fields=['pages'])
|
|
long_field_index.model = Book
|
|
self.assertEqual(long_field_index.name, 'model_index_page_co_69235a_idx')
|
|
|
|
# suffix can't be longer than 3 characters.
|
|
long_field_index.suffix = 'suff'
|
|
msg = 'Index too long for multiple database support. Is self.suffix longer than 3 characters?'
|
|
with self.assertRaisesMessage(AssertionError, msg):
|
|
long_field_index.get_name()
|
|
|
|
def test_deconstruction(self):
|
|
index = models.Index(fields=['title'])
|
|
path, args, kwargs = index.deconstruct()
|
|
self.assertEqual(path, 'django.db.models.Index')
|
|
self.assertEqual(args, ())
|
|
self.assertEqual(kwargs, {'fields': ['title']})
|