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Fixed #26974 -- Added HashIndex to django.contrib.postgres.

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Thanks Akshesh Doshi for the initial implementation.
This commit is contained in:
Nick Pope 2017-12-05 09:43:56 +00:00 • committed by Tim Graham
parent 2092206bee
commit d526b07784
4 changed files with 88 additions and 2 deletions
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46
tests/postgres_tests/test_indexes.py
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@ -1,4 +1,6 @@
from django.contrib.postgres.indexes import BrinIndex, GinIndex, GistIndex
from django.contrib.postgres.indexes import (
BrinIndex, GinIndex, GistIndex, HashIndex,
)
from django.db import connection
from django.test import skipUnlessDBFeature
@ -83,6 +85,20 @@ class GistIndexTests(IndexTestMixin, PostgreSQLTestCase):
})
class HashIndexTests(IndexTestMixin, PostgreSQLTestCase):
index_class = HashIndex
def test_suffix(self):
self.assertEqual(HashIndex.suffix, 'hash')
def test_deconstruction(self):
index = HashIndex(fields=['title'], name='test_title_hash', fillfactor=80)
path, args, kwargs = index.deconstruct()
self.assertEqual(path, 'django.contrib.postgres.indexes.HashIndex')
self.assertEqual(args, ())
self.assertEqual(kwargs, {'fields': ['title'], 'name': 'test_title_hash', 'fillfactor': 80})
class SchemaTests(PostgreSQLTestCase):
def get_constraints(self, table):
@ -173,3 +189,31 @@ class SchemaTests(PostgreSQLTestCase):
with connection.schema_editor() as editor:
editor.remove_index(CharFieldModel, index)
self.assertNotIn(index_name, self.get_constraints(CharFieldModel._meta.db_table))
def test_hash_index(self):
# Ensure the table is there and doesn't have an index.
self.assertNotIn('field', self.get_constraints(CharFieldModel._meta.db_table))
# Add the index.
index_name = 'char_field_model_field_hash'
index = HashIndex(fields=['field'], name=index_name)
with connection.schema_editor() as editor:
editor.add_index(CharFieldModel, index)
constraints = self.get_constraints(CharFieldModel._meta.db_table)
# The index was added.
self.assertEqual(constraints[index_name]['type'], HashIndex.suffix)
# Drop the index.
with connection.schema_editor() as editor:
editor.remove_index(CharFieldModel, index)
self.assertNotIn(index_name, self.get_constraints(CharFieldModel._meta.db_table))
def test_hash_parameters(self):
index_name = 'integer_array_hash_fillfactor'
index = HashIndex(fields=['field'], name=index_name, fillfactor=80)
with connection.schema_editor() as editor:
editor.add_index(CharFieldModel, index)
constraints = self.get_constraints(CharFieldModel._meta.db_table)
self.assertEqual(constraints[index_name]['type'], HashIndex.suffix)
self.assertEqual(constraints[index_name]['options'], ['fillfactor=80'])
with connection.schema_editor() as editor:
editor.remove_index(CharFieldModel, index)
self.assertNotIn(index_name, self.get_constraints(CharFieldModel._meta.db_table))