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

Thanks Akshesh Doshi for the initial implementation.

1 files changed, 45 insertions, 1 deletions

diff --git a/tests/postgres_tests/test_indexes.py b/tests/postgres_tests/test_indexes.py
index defab8530a..dcb285cc1c 100644
--- a/tests/postgres_tests/test_indexes.py
+++ b/tests/postgres_tests/test_indexes.py
@@ -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))