mirror of https://github.com/django/django.git
1203 lines
47 KiB
Python
1203 lines
47 KiB
Python
# Unit and doctests for specific database backends.
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import datetime
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import re
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import threading
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import unittest
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import warnings
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from decimal import Decimal, Rounded
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from unittest import mock
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from django.core.exceptions import ImproperlyConfigured
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from django.core.management.color import no_style
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from django.db import (
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DEFAULT_DB_ALIAS, DatabaseError, IntegrityError, connection, connections,
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reset_queries, transaction,
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)
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from django.db.backends.base.base import BaseDatabaseWrapper
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from django.db.backends.signals import connection_created
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from django.db.backends.utils import CursorWrapper, format_number
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from django.db.models import Avg, StdDev, Sum, Variance
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from django.db.models.sql.constants import CURSOR
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from django.db.utils import ConnectionHandler
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from django.test import (
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SimpleTestCase, TestCase, TransactionTestCase, override_settings,
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skipIfDBFeature, skipUnlessDBFeature,
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)
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from .models import (
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Article, Item, Object, ObjectReference, Person, Post, RawData, Reporter,
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ReporterProxy, SchoolClass, Square,
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VeryLongModelNameZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ,
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)
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class DatabaseWrapperTests(SimpleTestCase):
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def test_initialization_class_attributes(self):
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"""
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The "initialization" class attributes like client_class and
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creation_class should be set on the class and reflected in the
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corresponding instance attributes of the instantiated backend.
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"""
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conn = connections[DEFAULT_DB_ALIAS]
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conn_class = type(conn)
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attr_names = [
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('client_class', 'client'),
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('creation_class', 'creation'),
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('features_class', 'features'),
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('introspection_class', 'introspection'),
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('ops_class', 'ops'),
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('validation_class', 'validation'),
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]
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for class_attr_name, instance_attr_name in attr_names:
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class_attr_value = getattr(conn_class, class_attr_name)
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self.assertIsNotNone(class_attr_value)
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instance_attr_value = getattr(conn, instance_attr_name)
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self.assertIsInstance(instance_attr_value, class_attr_value)
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class DummyBackendTest(SimpleTestCase):
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def test_no_databases(self):
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"""
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Empty DATABASES setting default to the dummy backend.
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"""
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DATABASES = {}
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conns = ConnectionHandler(DATABASES)
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self.assertEqual(conns[DEFAULT_DB_ALIAS].settings_dict['ENGINE'], 'django.db.backends.dummy')
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with self.assertRaises(ImproperlyConfigured):
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conns[DEFAULT_DB_ALIAS].ensure_connection()
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@unittest.skipUnless(connection.vendor == 'oracle', "Test only for Oracle")
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class OracleTests(unittest.TestCase):
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def test_quote_name(self):
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# '%' chars are escaped for query execution.
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name = '"SOME%NAME"'
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quoted_name = connection.ops.quote_name(name)
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self.assertEqual(quoted_name % (), name)
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def test_dbms_session(self):
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# If the backend is Oracle, test that we can call a standard
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# stored procedure through our cursor wrapper.
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with connection.cursor() as cursor:
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cursor.callproc('DBMS_SESSION.SET_IDENTIFIER', ['_django_testing!'])
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def test_cursor_var(self):
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# If the backend is Oracle, test that we can pass cursor variables
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# as query parameters.
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from django.db.backends.oracle.base import Database
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with connection.cursor() as cursor:
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var = cursor.var(Database.STRING)
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cursor.execute("BEGIN %s := 'X'; END; ", [var])
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self.assertEqual(var.getvalue(), 'X')
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def test_long_string(self):
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# If the backend is Oracle, test that we can save a text longer
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# than 4000 chars and read it properly
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with connection.cursor() as cursor:
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cursor.execute('CREATE TABLE ltext ("TEXT" NCLOB)')
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long_str = ''.join(str(x) for x in range(4000))
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cursor.execute('INSERT INTO ltext VALUES (%s)', [long_str])
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cursor.execute('SELECT text FROM ltext')
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row = cursor.fetchone()
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self.assertEqual(long_str, row[0].read())
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cursor.execute('DROP TABLE ltext')
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def test_client_encoding(self):
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# If the backend is Oracle, test that the client encoding is set
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# correctly. This was broken under Cygwin prior to r14781.
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connection.ensure_connection()
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self.assertEqual(connection.connection.encoding, "UTF-8")
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self.assertEqual(connection.connection.nencoding, "UTF-8")
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def test_order_of_nls_parameters(self):
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# an 'almost right' datetime should work with configured
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# NLS parameters as per #18465.
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with connection.cursor() as cursor:
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query = "select 1 from dual where '1936-12-29 00:00' < sysdate"
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# The query succeeds without errors - pre #18465 this
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# wasn't the case.
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cursor.execute(query)
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self.assertEqual(cursor.fetchone()[0], 1)
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@unittest.skipUnless(connection.vendor == 'sqlite', "Test only for SQLite")
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class SQLiteTests(TestCase):
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longMessage = True
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def test_autoincrement(self):
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"""
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auto_increment fields are created with the AUTOINCREMENT keyword
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in order to be monotonically increasing. Refs #10164.
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"""
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with connection.schema_editor(collect_sql=True) as editor:
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editor.create_model(Square)
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statements = editor.collected_sql
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match = re.search('"id" ([^,]+),', statements[0])
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self.assertIsNotNone(match)
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self.assertEqual(
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'integer NOT NULL PRIMARY KEY AUTOINCREMENT',
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match.group(1),
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"Wrong SQL used to create an auto-increment column on SQLite"
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)
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def test_aggregation(self):
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"""
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#19360: Raise NotImplementedError when aggregating on date/time fields.
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"""
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for aggregate in (Sum, Avg, Variance, StdDev):
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with self.assertRaises(NotImplementedError):
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Item.objects.all().aggregate(aggregate('time'))
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with self.assertRaises(NotImplementedError):
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Item.objects.all().aggregate(aggregate('date'))
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with self.assertRaises(NotImplementedError):
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Item.objects.all().aggregate(aggregate('last_modified'))
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with self.assertRaises(NotImplementedError):
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Item.objects.all().aggregate(
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**{'complex': aggregate('last_modified') + aggregate('last_modified')}
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)
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def test_memory_db_test_name(self):
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"""
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A named in-memory db should be allowed where supported.
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"""
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from django.db.backends.sqlite3.base import DatabaseWrapper
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settings_dict = {
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'TEST': {
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'NAME': 'file:memorydb_test?mode=memory&cache=shared',
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}
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}
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wrapper = DatabaseWrapper(settings_dict)
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creation = wrapper.creation
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if creation.connection.features.can_share_in_memory_db:
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expected = creation.connection.settings_dict['TEST']['NAME']
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self.assertEqual(creation._get_test_db_name(), expected)
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else:
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msg = (
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"Using a shared memory database with `mode=memory` in the "
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"database name is not supported in your environment, "
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"use `:memory:` instead."
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)
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with self.assertRaisesMessage(ImproperlyConfigured, msg):
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creation._get_test_db_name()
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@unittest.skipUnless(connection.vendor == 'postgresql', "Test only for PostgreSQL")
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class PostgreSQLTests(TestCase):
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def test_nodb_connection(self):
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"""
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The _nodb_connection property fallbacks to the default connection
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database when access to the 'postgres' database is not granted.
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"""
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def mocked_connect(self):
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if self.settings_dict['NAME'] is None:
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raise DatabaseError()
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return ''
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nodb_conn = connection._nodb_connection
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self.assertIsNone(nodb_conn.settings_dict['NAME'])
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# Now assume the 'postgres' db isn't available
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with warnings.catch_warnings(record=True) as w:
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with mock.patch('django.db.backends.base.base.BaseDatabaseWrapper.connect',
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side_effect=mocked_connect, autospec=True):
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warnings.simplefilter('always', RuntimeWarning)
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nodb_conn = connection._nodb_connection
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self.assertIsNotNone(nodb_conn.settings_dict['NAME'])
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self.assertEqual(nodb_conn.settings_dict['NAME'], connection.settings_dict['NAME'])
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# Check a RuntimeWarning has been emitted
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self.assertEqual(len(w), 1)
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self.assertEqual(w[0].message.__class__, RuntimeWarning)
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def test_connect_and_rollback(self):
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"""
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PostgreSQL shouldn't roll back SET TIME ZONE, even if the first
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transaction is rolled back (#17062).
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"""
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new_connection = connection.copy()
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try:
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# Ensure the database default time zone is different than
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# the time zone in new_connection.settings_dict. We can
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# get the default time zone by reset & show.
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cursor = new_connection.cursor()
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cursor.execute("RESET TIMEZONE")
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cursor.execute("SHOW TIMEZONE")
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db_default_tz = cursor.fetchone()[0]
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new_tz = 'Europe/Paris' if db_default_tz == 'UTC' else 'UTC'
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new_connection.close()
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# Invalidate timezone name cache, because the setting_changed
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# handler cannot know about new_connection.
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del new_connection.timezone_name
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# Fetch a new connection with the new_tz as default
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# time zone, run a query and rollback.
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with self.settings(TIME_ZONE=new_tz):
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new_connection.set_autocommit(False)
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cursor = new_connection.cursor()
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new_connection.rollback()
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# Now let's see if the rollback rolled back the SET TIME ZONE.
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cursor.execute("SHOW TIMEZONE")
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tz = cursor.fetchone()[0]
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self.assertEqual(new_tz, tz)
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finally:
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new_connection.close()
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def test_connect_non_autocommit(self):
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"""
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The connection wrapper shouldn't believe that autocommit is enabled
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after setting the time zone when AUTOCOMMIT is False (#21452).
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"""
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new_connection = connection.copy()
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new_connection.settings_dict['AUTOCOMMIT'] = False
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try:
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# Open a database connection.
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new_connection.cursor()
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self.assertFalse(new_connection.get_autocommit())
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finally:
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new_connection.close()
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def test_connect_isolation_level(self):
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"""
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Regression test for #18130 and #24318.
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"""
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import psycopg2
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from psycopg2.extensions import (
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ISOLATION_LEVEL_READ_COMMITTED as read_committed,
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ISOLATION_LEVEL_SERIALIZABLE as serializable,
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)
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# Since this is a django.test.TestCase, a transaction is in progress
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# and the isolation level isn't reported as 0. This test assumes that
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# PostgreSQL is configured with the default isolation level.
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# Check the level on the psycopg2 connection, not the Django wrapper.
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default_level = read_committed if psycopg2.__version__ < '2.7' else None
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self.assertEqual(connection.connection.isolation_level, default_level)
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new_connection = connection.copy()
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new_connection.settings_dict['OPTIONS']['isolation_level'] = serializable
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try:
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# Start a transaction so the isolation level isn't reported as 0.
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new_connection.set_autocommit(False)
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# Check the level on the psycopg2 connection, not the Django wrapper.
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self.assertEqual(new_connection.connection.isolation_level, serializable)
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finally:
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new_connection.close()
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def _select(self, val):
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with connection.cursor() as cursor:
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cursor.execute("SELECT %s", (val,))
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return cursor.fetchone()[0]
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def test_select_ascii_array(self):
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a = ["awef"]
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b = self._select(a)
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self.assertEqual(a[0], b[0])
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def test_select_unicode_array(self):
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a = ["ᄲawef"]
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b = self._select(a)
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self.assertEqual(a[0], b[0])
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def test_lookup_cast(self):
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from django.db.backends.postgresql.operations import DatabaseOperations
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do = DatabaseOperations(connection=None)
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for lookup in ('iexact', 'contains', 'icontains', 'startswith',
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'istartswith', 'endswith', 'iendswith', 'regex', 'iregex'):
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self.assertIn('::text', do.lookup_cast(lookup))
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def test_correct_extraction_psycopg2_version(self):
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from django.db.backends.postgresql.base import psycopg2_version
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version_path = 'django.db.backends.postgresql.base.Database.__version__'
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with mock.patch(version_path, '2.6.9'):
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self.assertEqual(psycopg2_version(), (2, 6, 9))
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with mock.patch(version_path, '2.5.dev0'):
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self.assertEqual(psycopg2_version(), (2, 5))
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class DateQuotingTest(TestCase):
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def test_django_date_trunc(self):
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"""
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Test the custom ``django_date_trunc method``, in particular against
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fields which clash with strings passed to it (e.g. 'year') (#12818).
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"""
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updated = datetime.datetime(2010, 2, 20)
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SchoolClass.objects.create(year=2009, last_updated=updated)
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years = SchoolClass.objects.dates('last_updated', 'year')
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self.assertEqual(list(years), [datetime.date(2010, 1, 1)])
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def test_django_date_extract(self):
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"""
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Test the custom ``django_date_extract method``, in particular against fields
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which clash with strings passed to it (e.g. 'day') (#12818).
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"""
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updated = datetime.datetime(2010, 2, 20)
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SchoolClass.objects.create(year=2009, last_updated=updated)
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classes = SchoolClass.objects.filter(last_updated__day=20)
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self.assertEqual(len(classes), 1)
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@override_settings(DEBUG=True)
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class LastExecutedQueryTest(TestCase):
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def test_last_executed_query(self):
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"""
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last_executed_query should not raise an exception even if no previous
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query has been run.
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"""
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cursor = connection.cursor()
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connection.ops.last_executed_query(cursor, '', ())
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def test_debug_sql(self):
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list(Reporter.objects.filter(first_name="test"))
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sql = connection.queries[-1]['sql'].lower()
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self.assertIn("select", sql)
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self.assertIn(Reporter._meta.db_table, sql)
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def test_query_encoding(self):
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"""last_executed_query() returns a string."""
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data = RawData.objects.filter(raw_data=b'\x00\x46 \xFE').extra(select={'föö': 1})
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sql, params = data.query.sql_with_params()
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cursor = data.query.get_compiler('default').execute_sql(CURSOR)
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last_sql = cursor.db.ops.last_executed_query(cursor, sql, params)
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self.assertIsInstance(last_sql, str)
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@unittest.skipUnless(connection.vendor == 'sqlite',
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"This test is specific to SQLite.")
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def test_no_interpolation_on_sqlite(self):
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# This shouldn't raise an exception (##17158)
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query = "SELECT strftime('%Y', 'now');"
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connection.cursor().execute(query)
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self.assertEqual(connection.queries[-1]['sql'], query)
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@unittest.skipUnless(connection.vendor == 'sqlite',
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"This test is specific to SQLite.")
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def test_parameter_quoting_on_sqlite(self):
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# The implementation of last_executed_queries isn't optimal. It's
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# worth testing that parameters are quoted. See #14091.
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query = "SELECT %s"
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params = ["\"'\\"]
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connection.cursor().execute(query, params)
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# Note that the single quote is repeated
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substituted = "SELECT '\"''\\'"
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self.assertEqual(connection.queries[-1]['sql'], substituted)
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@unittest.skipUnless(connection.vendor == 'sqlite',
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"This test is specific to SQLite.")
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def test_large_number_of_parameters_on_sqlite(self):
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# If SQLITE_MAX_VARIABLE_NUMBER (default = 999) has been changed to be
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# greater than SQLITE_MAX_COLUMN (default = 2000), last_executed_query
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# can hit the SQLITE_MAX_COLUMN limit. See #26063.
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cursor = connection.cursor()
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sql = "SELECT MAX(%s)" % ", ".join(["%s"] * 2001)
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params = list(range(2001))
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# This should not raise an exception.
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cursor.db.ops.last_executed_query(cursor.cursor, sql, params)
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class ParameterHandlingTest(TestCase):
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def test_bad_parameter_count(self):
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"An executemany call with too many/not enough parameters will raise an exception (Refs #12612)"
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cursor = connection.cursor()
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query = ('INSERT INTO %s (%s, %s) VALUES (%%s, %%s)' % (
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connection.introspection.table_name_converter('backends_square'),
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connection.ops.quote_name('root'),
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connection.ops.quote_name('square')
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))
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with self.assertRaises(Exception):
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cursor.executemany(query, [(1, 2, 3)])
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with self.assertRaises(Exception):
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cursor.executemany(query, [(1,)])
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class LongNameTest(TransactionTestCase):
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"""Long primary keys and model names can result in a sequence name
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that exceeds the database limits, which will result in truncation
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on certain databases (e.g., Postgres). The backend needs to use
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the correct sequence name in last_insert_id and other places, so
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check it is. Refs #8901.
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"""
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available_apps = ['backends']
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def test_sequence_name_length_limits_create(self):
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"""Test creation of model with long name and long pk name doesn't error. Ref #8901"""
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VeryLongModelNameZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ.objects.create()
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def test_sequence_name_length_limits_m2m(self):
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"""
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An m2m save of a model with a long name and a long m2m field name
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doesn't error (#8901).
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"""
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obj = VeryLongModelNameZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ.objects.create()
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rel_obj = Person.objects.create(first_name='Django', last_name='Reinhardt')
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obj.m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.add(rel_obj)
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def test_sequence_name_length_limits_flush(self):
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"""
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Sequence resetting as part of a flush with model with long name and
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long pk name doesn't error (#8901).
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"""
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# A full flush is expensive to the full test, so we dig into the
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# internals to generate the likely offending SQL and run it manually
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# Some convenience aliases
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VLM = VeryLongModelNameZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
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VLM_m2m = VLM.m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.through
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tables = [
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VLM._meta.db_table,
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VLM_m2m._meta.db_table,
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]
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sequences = [
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{
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'column': VLM._meta.pk.column,
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'table': VLM._meta.db_table
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},
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]
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cursor = connection.cursor()
|
|
for statement in connection.ops.sql_flush(no_style(), tables, sequences):
|
|
cursor.execute(statement)
|
|
|
|
|
|
class SequenceResetTest(TestCase):
|
|
|
|
def test_generic_relation(self):
|
|
"Sequence names are correct when resetting generic relations (Ref #13941)"
|
|
# Create an object with a manually specified PK
|
|
Post.objects.create(id=10, name='1st post', text='hello world')
|
|
|
|
# Reset the sequences for the database
|
|
cursor = connection.cursor()
|
|
commands = connections[DEFAULT_DB_ALIAS].ops.sequence_reset_sql(no_style(), [Post])
|
|
for sql in commands:
|
|
cursor.execute(sql)
|
|
|
|
# If we create a new object now, it should have a PK greater
|
|
# than the PK we specified manually.
|
|
obj = Post.objects.create(name='New post', text='goodbye world')
|
|
self.assertGreater(obj.pk, 10)
|
|
|
|
|
|
# This test needs to run outside of a transaction, otherwise closing the
|
|
# connection would implicitly rollback and cause problems during teardown.
|
|
class ConnectionCreatedSignalTest(TransactionTestCase):
|
|
|
|
available_apps = []
|
|
|
|
# Unfortunately with sqlite3 the in-memory test database cannot be closed,
|
|
# and so it cannot be re-opened during testing.
|
|
@skipUnlessDBFeature('test_db_allows_multiple_connections')
|
|
def test_signal(self):
|
|
data = {}
|
|
|
|
def receiver(sender, connection, **kwargs):
|
|
data["connection"] = connection
|
|
|
|
connection_created.connect(receiver)
|
|
connection.close()
|
|
connection.cursor()
|
|
self.assertIs(data["connection"].connection, connection.connection)
|
|
|
|
connection_created.disconnect(receiver)
|
|
data.clear()
|
|
connection.cursor()
|
|
self.assertEqual(data, {})
|
|
|
|
|
|
class EscapingChecks(TestCase):
|
|
"""
|
|
All tests in this test case are also run with settings.DEBUG=True in
|
|
EscapingChecksDebug test case, to also test CursorDebugWrapper.
|
|
"""
|
|
|
|
bare_select_suffix = connection.features.bare_select_suffix
|
|
|
|
def test_paramless_no_escaping(self):
|
|
cursor = connection.cursor()
|
|
cursor.execute("SELECT '%s'" + self.bare_select_suffix)
|
|
self.assertEqual(cursor.fetchall()[0][0], '%s')
|
|
|
|
def test_parameter_escaping(self):
|
|
cursor = connection.cursor()
|
|
cursor.execute("SELECT '%%', %s" + self.bare_select_suffix, ('%d',))
|
|
self.assertEqual(cursor.fetchall()[0], ('%', '%d'))
|
|
|
|
@unittest.skipUnless(connection.vendor == 'sqlite',
|
|
"This is an sqlite-specific issue")
|
|
def test_sqlite_parameter_escaping(self):
|
|
# '%s' escaping support for sqlite3 #13648
|
|
cursor = connection.cursor()
|
|
cursor.execute("select strftime('%s', date('now'))")
|
|
response = cursor.fetchall()[0][0]
|
|
# response should be an non-zero integer
|
|
self.assertTrue(int(response))
|
|
|
|
|
|
@override_settings(DEBUG=True)
|
|
class EscapingChecksDebug(EscapingChecks):
|
|
pass
|
|
|
|
|
|
class BackendTestCase(TransactionTestCase):
|
|
|
|
available_apps = ['backends']
|
|
|
|
def create_squares_with_executemany(self, args):
|
|
self.create_squares(args, 'format', True)
|
|
|
|
def create_squares(self, args, paramstyle, multiple):
|
|
cursor = connection.cursor()
|
|
opts = Square._meta
|
|
tbl = connection.introspection.table_name_converter(opts.db_table)
|
|
f1 = connection.ops.quote_name(opts.get_field('root').column)
|
|
f2 = connection.ops.quote_name(opts.get_field('square').column)
|
|
if paramstyle == 'format':
|
|
query = 'INSERT INTO %s (%s, %s) VALUES (%%s, %%s)' % (tbl, f1, f2)
|
|
elif paramstyle == 'pyformat':
|
|
query = 'INSERT INTO %s (%s, %s) VALUES (%%(root)s, %%(square)s)' % (tbl, f1, f2)
|
|
else:
|
|
raise ValueError("unsupported paramstyle in test")
|
|
if multiple:
|
|
cursor.executemany(query, args)
|
|
else:
|
|
cursor.execute(query, args)
|
|
|
|
def test_cursor_executemany(self):
|
|
# Test cursor.executemany #4896
|
|
args = [(i, i ** 2) for i in range(-5, 6)]
|
|
self.create_squares_with_executemany(args)
|
|
self.assertEqual(Square.objects.count(), 11)
|
|
for i in range(-5, 6):
|
|
square = Square.objects.get(root=i)
|
|
self.assertEqual(square.square, i ** 2)
|
|
|
|
def test_cursor_executemany_with_empty_params_list(self):
|
|
# Test executemany with params=[] does nothing #4765
|
|
args = []
|
|
self.create_squares_with_executemany(args)
|
|
self.assertEqual(Square.objects.count(), 0)
|
|
|
|
def test_cursor_executemany_with_iterator(self):
|
|
# Test executemany accepts iterators #10320
|
|
args = iter((i, i ** 2) for i in range(-3, 2))
|
|
self.create_squares_with_executemany(args)
|
|
self.assertEqual(Square.objects.count(), 5)
|
|
|
|
args = iter((i, i ** 2) for i in range(3, 7))
|
|
with override_settings(DEBUG=True):
|
|
# same test for DebugCursorWrapper
|
|
self.create_squares_with_executemany(args)
|
|
self.assertEqual(Square.objects.count(), 9)
|
|
|
|
@skipUnlessDBFeature('supports_paramstyle_pyformat')
|
|
def test_cursor_execute_with_pyformat(self):
|
|
# Support pyformat style passing of parameters #10070
|
|
args = {'root': 3, 'square': 9}
|
|
self.create_squares(args, 'pyformat', multiple=False)
|
|
self.assertEqual(Square.objects.count(), 1)
|
|
|
|
@skipUnlessDBFeature('supports_paramstyle_pyformat')
|
|
def test_cursor_executemany_with_pyformat(self):
|
|
# Support pyformat style passing of parameters #10070
|
|
args = [{'root': i, 'square': i ** 2} for i in range(-5, 6)]
|
|
self.create_squares(args, 'pyformat', multiple=True)
|
|
self.assertEqual(Square.objects.count(), 11)
|
|
for i in range(-5, 6):
|
|
square = Square.objects.get(root=i)
|
|
self.assertEqual(square.square, i ** 2)
|
|
|
|
@skipUnlessDBFeature('supports_paramstyle_pyformat')
|
|
def test_cursor_executemany_with_pyformat_iterator(self):
|
|
args = iter({'root': i, 'square': i ** 2} for i in range(-3, 2))
|
|
self.create_squares(args, 'pyformat', multiple=True)
|
|
self.assertEqual(Square.objects.count(), 5)
|
|
|
|
args = iter({'root': i, 'square': i ** 2} for i in range(3, 7))
|
|
with override_settings(DEBUG=True):
|
|
# same test for DebugCursorWrapper
|
|
self.create_squares(args, 'pyformat', multiple=True)
|
|
self.assertEqual(Square.objects.count(), 9)
|
|
|
|
def test_unicode_fetches(self):
|
|
# fetchone, fetchmany, fetchall return strings as unicode objects #6254
|
|
qn = connection.ops.quote_name
|
|
Person(first_name="John", last_name="Doe").save()
|
|
Person(first_name="Jane", last_name="Doe").save()
|
|
Person(first_name="Mary", last_name="Agnelline").save()
|
|
Person(first_name="Peter", last_name="Parker").save()
|
|
Person(first_name="Clark", last_name="Kent").save()
|
|
opts2 = Person._meta
|
|
f3, f4 = opts2.get_field('first_name'), opts2.get_field('last_name')
|
|
cursor = connection.cursor()
|
|
cursor.execute(
|
|
'SELECT %s, %s FROM %s ORDER BY %s' % (
|
|
qn(f3.column),
|
|
qn(f4.column),
|
|
connection.introspection.table_name_converter(opts2.db_table),
|
|
qn(f3.column),
|
|
)
|
|
)
|
|
self.assertEqual(cursor.fetchone(), ('Clark', 'Kent'))
|
|
self.assertEqual(list(cursor.fetchmany(2)), [('Jane', 'Doe'), ('John', 'Doe')])
|
|
self.assertEqual(list(cursor.fetchall()), [('Mary', 'Agnelline'), ('Peter', 'Parker')])
|
|
|
|
def test_unicode_password(self):
|
|
old_password = connection.settings_dict['PASSWORD']
|
|
connection.settings_dict['PASSWORD'] = "françois"
|
|
try:
|
|
connection.cursor()
|
|
except DatabaseError:
|
|
# As password is probably wrong, a database exception is expected
|
|
pass
|
|
except Exception as e:
|
|
self.fail("Unexpected error raised with unicode password: %s" % e)
|
|
finally:
|
|
connection.settings_dict['PASSWORD'] = old_password
|
|
|
|
def test_database_operations_helper_class(self):
|
|
# Ticket #13630
|
|
self.assertTrue(hasattr(connection, 'ops'))
|
|
self.assertTrue(hasattr(connection.ops, 'connection'))
|
|
self.assertEqual(connection, connection.ops.connection)
|
|
|
|
def test_database_operations_init(self):
|
|
"""
|
|
DatabaseOperations initialization doesn't query the database.
|
|
See #17656.
|
|
"""
|
|
with self.assertNumQueries(0):
|
|
connection.ops.__class__(connection)
|
|
|
|
def test_cached_db_features(self):
|
|
self.assertIn(connection.features.supports_transactions, (True, False))
|
|
self.assertIn(connection.features.supports_stddev, (True, False))
|
|
self.assertIn(connection.features.can_introspect_foreign_keys, (True, False))
|
|
|
|
def test_duplicate_table_error(self):
|
|
""" Creating an existing table returns a DatabaseError """
|
|
cursor = connection.cursor()
|
|
query = 'CREATE TABLE %s (id INTEGER);' % Article._meta.db_table
|
|
with self.assertRaises(DatabaseError):
|
|
cursor.execute(query)
|
|
|
|
def test_cursor_contextmanager(self):
|
|
"""
|
|
Cursors can be used as a context manager
|
|
"""
|
|
with connection.cursor() as cursor:
|
|
self.assertIsInstance(cursor, CursorWrapper)
|
|
# Both InterfaceError and ProgrammingError seem to be used when
|
|
# accessing closed cursor (psycopg2 has InterfaceError, rest seem
|
|
# to use ProgrammingError).
|
|
with self.assertRaises(connection.features.closed_cursor_error_class):
|
|
# cursor should be closed, so no queries should be possible.
|
|
cursor.execute("SELECT 1" + connection.features.bare_select_suffix)
|
|
|
|
@unittest.skipUnless(connection.vendor == 'postgresql',
|
|
"Psycopg2 specific cursor.closed attribute needed")
|
|
def test_cursor_contextmanager_closing(self):
|
|
# There isn't a generic way to test that cursors are closed, but
|
|
# psycopg2 offers us a way to check that by closed attribute.
|
|
# So, run only on psycopg2 for that reason.
|
|
with connection.cursor() as cursor:
|
|
self.assertIsInstance(cursor, CursorWrapper)
|
|
self.assertTrue(cursor.closed)
|
|
|
|
# Unfortunately with sqlite3 the in-memory test database cannot be closed.
|
|
@skipUnlessDBFeature('test_db_allows_multiple_connections')
|
|
def test_is_usable_after_database_disconnects(self):
|
|
"""
|
|
is_usable() doesn't crash when the database disconnects (#21553).
|
|
"""
|
|
# Open a connection to the database.
|
|
with connection.cursor():
|
|
pass
|
|
# Emulate a connection close by the database.
|
|
connection._close()
|
|
# Even then is_usable() should not raise an exception.
|
|
try:
|
|
self.assertFalse(connection.is_usable())
|
|
finally:
|
|
# Clean up the mess created by connection._close(). Since the
|
|
# connection is already closed, this crashes on some backends.
|
|
try:
|
|
connection.close()
|
|
except Exception:
|
|
pass
|
|
|
|
@override_settings(DEBUG=True)
|
|
def test_queries(self):
|
|
"""
|
|
Test the documented API of connection.queries.
|
|
"""
|
|
with connection.cursor() as cursor:
|
|
reset_queries()
|
|
cursor.execute("SELECT 1" + connection.features.bare_select_suffix)
|
|
self.assertEqual(1, len(connection.queries))
|
|
|
|
self.assertIsInstance(connection.queries, list)
|
|
self.assertIsInstance(connection.queries[0], dict)
|
|
self.assertCountEqual(connection.queries[0].keys(), ['sql', 'time'])
|
|
|
|
reset_queries()
|
|
self.assertEqual(0, len(connection.queries))
|
|
|
|
# Unfortunately with sqlite3 the in-memory test database cannot be closed.
|
|
@skipUnlessDBFeature('test_db_allows_multiple_connections')
|
|
@override_settings(DEBUG=True)
|
|
def test_queries_limit(self):
|
|
"""
|
|
The backend doesn't store an unlimited number of queries (#12581).
|
|
"""
|
|
old_queries_limit = BaseDatabaseWrapper.queries_limit
|
|
BaseDatabaseWrapper.queries_limit = 3
|
|
new_connection = connection.copy()
|
|
|
|
# Initialize the connection and clear initialization statements.
|
|
with new_connection.cursor():
|
|
pass
|
|
new_connection.queries_log.clear()
|
|
|
|
try:
|
|
with new_connection.cursor() as cursor:
|
|
cursor.execute("SELECT 1" + new_connection.features.bare_select_suffix)
|
|
cursor.execute("SELECT 2" + new_connection.features.bare_select_suffix)
|
|
|
|
with warnings.catch_warnings(record=True) as w:
|
|
self.assertEqual(2, len(new_connection.queries))
|
|
self.assertEqual(0, len(w))
|
|
|
|
with new_connection.cursor() as cursor:
|
|
cursor.execute("SELECT 3" + new_connection.features.bare_select_suffix)
|
|
cursor.execute("SELECT 4" + new_connection.features.bare_select_suffix)
|
|
|
|
with warnings.catch_warnings(record=True) as w:
|
|
self.assertEqual(3, len(new_connection.queries))
|
|
self.assertEqual(1, len(w))
|
|
self.assertEqual(
|
|
str(w[0].message),
|
|
"Limit for query logging exceeded, only the last 3 queries will be returned."
|
|
)
|
|
finally:
|
|
BaseDatabaseWrapper.queries_limit = old_queries_limit
|
|
new_connection.close()
|
|
|
|
def test_timezone_none_use_tz_false(self):
|
|
connection.ensure_connection()
|
|
with self.settings(TIME_ZONE=None, USE_TZ=False):
|
|
connection.init_connection_state()
|
|
|
|
|
|
# We don't make these tests conditional because that means we would need to
|
|
# check and differentiate between:
|
|
# * MySQL+InnoDB, MySQL+MYISAM (something we currently can't do).
|
|
# * if sqlite3 (if/once we get #14204 fixed) has referential integrity turned
|
|
# on or not, something that would be controlled by runtime support and user
|
|
# preference.
|
|
# verify if its type is django.database.db.IntegrityError.
|
|
class FkConstraintsTests(TransactionTestCase):
|
|
|
|
available_apps = ['backends']
|
|
|
|
def setUp(self):
|
|
# Create a Reporter.
|
|
self.r = Reporter.objects.create(first_name='John', last_name='Smith')
|
|
|
|
def test_integrity_checks_on_creation(self):
|
|
"""
|
|
Try to create a model instance that violates a FK constraint. If it
|
|
fails it should fail with IntegrityError.
|
|
"""
|
|
a1 = Article(headline="This is a test", pub_date=datetime.datetime(2005, 7, 27), reporter_id=30)
|
|
try:
|
|
a1.save()
|
|
except IntegrityError:
|
|
pass
|
|
else:
|
|
self.skipTest("This backend does not support integrity checks.")
|
|
# Now that we know this backend supports integrity checks we make sure
|
|
# constraints are also enforced for proxy Refs #17519
|
|
a2 = Article(
|
|
headline='This is another test', reporter=self.r,
|
|
pub_date=datetime.datetime(2012, 8, 3),
|
|
reporter_proxy_id=30,
|
|
)
|
|
with self.assertRaises(IntegrityError):
|
|
a2.save()
|
|
|
|
def test_integrity_checks_on_update(self):
|
|
"""
|
|
Try to update a model instance introducing a FK constraint violation.
|
|
If it fails it should fail with IntegrityError.
|
|
"""
|
|
# Create an Article.
|
|
Article.objects.create(headline="Test article", pub_date=datetime.datetime(2010, 9, 4), reporter=self.r)
|
|
# Retrieve it from the DB
|
|
a1 = Article.objects.get(headline="Test article")
|
|
a1.reporter_id = 30
|
|
try:
|
|
a1.save()
|
|
except IntegrityError:
|
|
pass
|
|
else:
|
|
self.skipTest("This backend does not support integrity checks.")
|
|
# Now that we know this backend supports integrity checks we make sure
|
|
# constraints are also enforced for proxy Refs #17519
|
|
# Create another article
|
|
r_proxy = ReporterProxy.objects.get(pk=self.r.pk)
|
|
Article.objects.create(
|
|
headline='Another article',
|
|
pub_date=datetime.datetime(1988, 5, 15),
|
|
reporter=self.r, reporter_proxy=r_proxy,
|
|
)
|
|
# Retrieve the second article from the DB
|
|
a2 = Article.objects.get(headline='Another article')
|
|
a2.reporter_proxy_id = 30
|
|
with self.assertRaises(IntegrityError):
|
|
a2.save()
|
|
|
|
def test_disable_constraint_checks_manually(self):
|
|
"""
|
|
When constraint checks are disabled, should be able to write bad data
|
|
without IntegrityErrors.
|
|
"""
|
|
with transaction.atomic():
|
|
# Create an Article.
|
|
Article.objects.create(
|
|
headline="Test article",
|
|
pub_date=datetime.datetime(2010, 9, 4),
|
|
reporter=self.r,
|
|
)
|
|
# Retrieve it from the DB
|
|
a = Article.objects.get(headline="Test article")
|
|
a.reporter_id = 30
|
|
try:
|
|
connection.disable_constraint_checking()
|
|
a.save()
|
|
connection.enable_constraint_checking()
|
|
except IntegrityError:
|
|
self.fail("IntegrityError should not have occurred.")
|
|
transaction.set_rollback(True)
|
|
|
|
def test_disable_constraint_checks_context_manager(self):
|
|
"""
|
|
When constraint checks are disabled (using context manager), should be
|
|
able to write bad data without IntegrityErrors.
|
|
"""
|
|
with transaction.atomic():
|
|
# Create an Article.
|
|
Article.objects.create(
|
|
headline="Test article",
|
|
pub_date=datetime.datetime(2010, 9, 4),
|
|
reporter=self.r,
|
|
)
|
|
# Retrieve it from the DB
|
|
a = Article.objects.get(headline="Test article")
|
|
a.reporter_id = 30
|
|
try:
|
|
with connection.constraint_checks_disabled():
|
|
a.save()
|
|
except IntegrityError:
|
|
self.fail("IntegrityError should not have occurred.")
|
|
transaction.set_rollback(True)
|
|
|
|
def test_check_constraints(self):
|
|
"""
|
|
Constraint checks should raise an IntegrityError when bad data is in the DB.
|
|
"""
|
|
with transaction.atomic():
|
|
# Create an Article.
|
|
Article.objects.create(
|
|
headline="Test article",
|
|
pub_date=datetime.datetime(2010, 9, 4),
|
|
reporter=self.r,
|
|
)
|
|
# Retrieve it from the DB
|
|
a = Article.objects.get(headline="Test article")
|
|
a.reporter_id = 30
|
|
with connection.constraint_checks_disabled():
|
|
a.save()
|
|
with self.assertRaises(IntegrityError):
|
|
connection.check_constraints()
|
|
transaction.set_rollback(True)
|
|
|
|
|
|
class ThreadTests(TransactionTestCase):
|
|
|
|
available_apps = ['backends']
|
|
|
|
def test_default_connection_thread_local(self):
|
|
"""
|
|
The default connection (i.e. django.db.connection) is different for
|
|
each thread (#17258).
|
|
"""
|
|
# Map connections by id because connections with identical aliases
|
|
# have the same hash.
|
|
connections_dict = {}
|
|
connection.cursor()
|
|
connections_dict[id(connection)] = connection
|
|
|
|
def runner():
|
|
# Passing django.db.connection between threads doesn't work while
|
|
# connections[DEFAULT_DB_ALIAS] does.
|
|
from django.db import connections
|
|
connection = connections[DEFAULT_DB_ALIAS]
|
|
# Allow thread sharing so the connection can be closed by the
|
|
# main thread.
|
|
connection.allow_thread_sharing = True
|
|
connection.cursor()
|
|
connections_dict[id(connection)] = connection
|
|
for x in range(2):
|
|
t = threading.Thread(target=runner)
|
|
t.start()
|
|
t.join()
|
|
# Each created connection got different inner connection.
|
|
self.assertEqual(
|
|
len(set(conn.connection for conn in connections_dict.values())),
|
|
3)
|
|
# Finish by closing the connections opened by the other threads (the
|
|
# connection opened in the main thread will automatically be closed on
|
|
# teardown).
|
|
for conn in connections_dict.values():
|
|
if conn is not connection:
|
|
conn.close()
|
|
|
|
def test_connections_thread_local(self):
|
|
"""
|
|
The connections are different for each thread (#17258).
|
|
"""
|
|
# Map connections by id because connections with identical aliases
|
|
# have the same hash.
|
|
connections_dict = {}
|
|
for conn in connections.all():
|
|
connections_dict[id(conn)] = conn
|
|
|
|
def runner():
|
|
from django.db import connections
|
|
for conn in connections.all():
|
|
# Allow thread sharing so the connection can be closed by the
|
|
# main thread.
|
|
conn.allow_thread_sharing = True
|
|
connections_dict[id(conn)] = conn
|
|
for x in range(2):
|
|
t = threading.Thread(target=runner)
|
|
t.start()
|
|
t.join()
|
|
self.assertEqual(len(connections_dict), 6)
|
|
# Finish by closing the connections opened by the other threads (the
|
|
# connection opened in the main thread will automatically be closed on
|
|
# teardown).
|
|
for conn in connections_dict.values():
|
|
if conn is not connection:
|
|
conn.close()
|
|
|
|
def test_pass_connection_between_threads(self):
|
|
"""
|
|
A connection can be passed from one thread to the other (#17258).
|
|
"""
|
|
Person.objects.create(first_name="John", last_name="Doe")
|
|
|
|
def do_thread():
|
|
def runner(main_thread_connection):
|
|
from django.db import connections
|
|
connections['default'] = main_thread_connection
|
|
try:
|
|
Person.objects.get(first_name="John", last_name="Doe")
|
|
except Exception as e:
|
|
exceptions.append(e)
|
|
t = threading.Thread(target=runner, args=[connections['default']])
|
|
t.start()
|
|
t.join()
|
|
|
|
# Without touching allow_thread_sharing, which should be False by default.
|
|
exceptions = []
|
|
do_thread()
|
|
# Forbidden!
|
|
self.assertIsInstance(exceptions[0], DatabaseError)
|
|
|
|
# If explicitly setting allow_thread_sharing to False
|
|
connections['default'].allow_thread_sharing = False
|
|
exceptions = []
|
|
do_thread()
|
|
# Forbidden!
|
|
self.assertIsInstance(exceptions[0], DatabaseError)
|
|
|
|
# If explicitly setting allow_thread_sharing to True
|
|
connections['default'].allow_thread_sharing = True
|
|
exceptions = []
|
|
do_thread()
|
|
# All good
|
|
self.assertEqual(exceptions, [])
|
|
|
|
def test_closing_non_shared_connections(self):
|
|
"""
|
|
A connection that is not explicitly shareable cannot be closed by
|
|
another thread (#17258).
|
|
"""
|
|
# First, without explicitly enabling the connection for sharing.
|
|
exceptions = set()
|
|
|
|
def runner1():
|
|
def runner2(other_thread_connection):
|
|
try:
|
|
other_thread_connection.close()
|
|
except DatabaseError as e:
|
|
exceptions.add(e)
|
|
t2 = threading.Thread(target=runner2, args=[connections['default']])
|
|
t2.start()
|
|
t2.join()
|
|
t1 = threading.Thread(target=runner1)
|
|
t1.start()
|
|
t1.join()
|
|
# The exception was raised
|
|
self.assertEqual(len(exceptions), 1)
|
|
|
|
# Then, with explicitly enabling the connection for sharing.
|
|
exceptions = set()
|
|
|
|
def runner1():
|
|
def runner2(other_thread_connection):
|
|
try:
|
|
other_thread_connection.close()
|
|
except DatabaseError as e:
|
|
exceptions.add(e)
|
|
# Enable thread sharing
|
|
connections['default'].allow_thread_sharing = True
|
|
t2 = threading.Thread(target=runner2, args=[connections['default']])
|
|
t2.start()
|
|
t2.join()
|
|
t1 = threading.Thread(target=runner1)
|
|
t1.start()
|
|
t1.join()
|
|
# No exception was raised
|
|
self.assertEqual(len(exceptions), 0)
|
|
|
|
|
|
class MySQLPKZeroTests(TestCase):
|
|
"""
|
|
Zero as id for AutoField should raise exception in MySQL, because MySQL
|
|
does not allow zero for autoincrement primary key.
|
|
"""
|
|
@skipIfDBFeature('allows_auto_pk_0')
|
|
def test_zero_as_autoval(self):
|
|
with self.assertRaises(ValueError):
|
|
Square.objects.create(id=0, root=0, square=1)
|
|
|
|
|
|
class DBConstraintTestCase(TestCase):
|
|
|
|
def test_can_reference_existent(self):
|
|
obj = Object.objects.create()
|
|
ref = ObjectReference.objects.create(obj=obj)
|
|
self.assertEqual(ref.obj, obj)
|
|
|
|
ref = ObjectReference.objects.get(obj=obj)
|
|
self.assertEqual(ref.obj, obj)
|
|
|
|
def test_can_reference_non_existent(self):
|
|
self.assertFalse(Object.objects.filter(id=12345).exists())
|
|
ref = ObjectReference.objects.create(obj_id=12345)
|
|
ref_new = ObjectReference.objects.get(obj_id=12345)
|
|
self.assertEqual(ref, ref_new)
|
|
|
|
with self.assertRaises(Object.DoesNotExist):
|
|
ref.obj
|
|
|
|
def test_many_to_many(self):
|
|
obj = Object.objects.create()
|
|
obj.related_objects.create()
|
|
self.assertEqual(Object.objects.count(), 2)
|
|
self.assertEqual(obj.related_objects.count(), 1)
|
|
|
|
intermediary_model = Object._meta.get_field("related_objects").remote_field.through
|
|
intermediary_model.objects.create(from_object_id=obj.id, to_object_id=12345)
|
|
self.assertEqual(obj.related_objects.count(), 1)
|
|
self.assertEqual(intermediary_model.objects.count(), 2)
|
|
|
|
|
|
class BackendUtilTests(SimpleTestCase):
|
|
|
|
def test_format_number(self):
|
|
"""
|
|
Test the format_number converter utility
|
|
"""
|
|
def equal(value, max_d, places, result):
|
|
self.assertEqual(format_number(Decimal(value), max_d, places), result)
|
|
|
|
equal('0', 12, 3,
|
|
'0.000')
|
|
equal('0', 12, 8,
|
|
'0.00000000')
|
|
equal('1', 12, 9,
|
|
'1.000000000')
|
|
equal('0.00000000', 12, 8,
|
|
'0.00000000')
|
|
equal('0.000000004', 12, 8,
|
|
'0.00000000')
|
|
equal('0.000000008', 12, 8,
|
|
'0.00000001')
|
|
equal('0.000000000000000000999', 10, 8,
|
|
'0.00000000')
|
|
equal('0.1234567890', 12, 10,
|
|
'0.1234567890')
|
|
equal('0.1234567890', 12, 9,
|
|
'0.123456789')
|
|
equal('0.1234567890', 12, 8,
|
|
'0.12345679')
|
|
equal('0.1234567890', 12, 5,
|
|
'0.12346')
|
|
equal('0.1234567890', 12, 3,
|
|
'0.123')
|
|
equal('0.1234567890', 12, 1,
|
|
'0.1')
|
|
equal('0.1234567890', 12, 0,
|
|
'0')
|
|
equal('0.1234567890', None, 0,
|
|
'0')
|
|
equal('1234567890.1234567890', None, 0,
|
|
'1234567890')
|
|
equal('1234567890.1234567890', None, 2,
|
|
'1234567890.12')
|
|
equal('0.1234', 5, None,
|
|
'0.1234')
|
|
equal('123.12', 5, None,
|
|
'123.12')
|
|
with self.assertRaises(Rounded):
|
|
equal('0.1234567890', 5, None,
|
|
'0.12346')
|
|
with self.assertRaises(Rounded):
|
|
equal('1234567890.1234', 5, None,
|
|
'1234600000')
|
|
|
|
|
|
@unittest.skipUnless(connection.vendor == 'sqlite', 'SQLite specific test.')
|
|
@skipUnlessDBFeature('can_share_in_memory_db')
|
|
class TestSqliteThreadSharing(TransactionTestCase):
|
|
available_apps = ['backends']
|
|
|
|
def test_database_sharing_in_threads(self):
|
|
def create_object():
|
|
Object.objects.create()
|
|
|
|
create_object()
|
|
|
|
thread = threading.Thread(target=create_object)
|
|
thread.start()
|
|
thread.join()
|
|
|
|
self.assertEqual(Object.objects.count(), 2)
|