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Enso-Bot/venv/Lib/site-packages/django/db/backends/postgresql/creation.py

78 lines
3.3 KiB
Python

import sys
from psycopg2 import errorcodes
from django.db.backends.base.creation import BaseDatabaseCreation
from django.db.backends.utils import strip_quotes
class DatabaseCreation(BaseDatabaseCreation):
def _quote_name(self, name):
return self.connection.ops.quote_name(name)
def _get_database_create_suffix(self, encoding=None, template=None):
suffix = ""
if encoding:
suffix += " ENCODING '{}'".format(encoding)
if template:
suffix += " TEMPLATE {}".format(self._quote_name(template))
return suffix and "WITH" + suffix
def sql_table_creation_suffix(self):
test_settings = self.connection.settings_dict['TEST']
assert test_settings['COLLATION'] is None, (
"PostgreSQL does not support collation setting at database creation time."
)
return self._get_database_create_suffix(
encoding=test_settings['CHARSET'],
template=test_settings.get('TEMPLATE'),
)
def _database_exists(self, cursor, database_name):
cursor.execute('SELECT 1 FROM pg_catalog.pg_database WHERE datname = %s', [strip_quotes(database_name)])
return cursor.fetchone() is not None
def _execute_create_test_db(self, cursor, parameters, keepdb=False):
try:
if keepdb and self._database_exists(cursor, parameters['dbname']):
# If the database should be kept and it already exists, don't
# try to create a new one.
return
super()._execute_create_test_db(cursor, parameters, keepdb)
except Exception as e:
if getattr(e.__cause__, 'pgcode', '') != errorcodes.DUPLICATE_DATABASE:
# All errors except "database already exists" cancel tests.
self.log('Got an error creating the test database: %s' % e)
sys.exit(2)
elif not keepdb:
# If the database should be kept, ignore "database already
# exists".
raise e
def _clone_test_db(self, suffix, verbosity, keepdb=False):
# CREATE DATABASE ... WITH TEMPLATE ... requires closing connections
# to the template database.
self.connection.close()
source_database_name = self.connection.settings_dict['NAME']
target_database_name = self.get_test_db_clone_settings(suffix)['NAME']
test_db_params = {
'dbname': self._quote_name(target_database_name),
'suffix': self._get_database_create_suffix(template=source_database_name),
}
with self._nodb_connection.cursor() as cursor:
try:
self._execute_create_test_db(cursor, test_db_params, keepdb)
except Exception:
try:
if verbosity >= 1:
self.log('Destroying old test database for alias %s...' % (
self._get_database_display_str(verbosity, target_database_name),
))
cursor.execute('DROP DATABASE %(dbname)s' % test_db_params)
self._execute_create_test_db(cursor, test_db_params, keepdb)
except Exception as e:
self.log('Got an error cloning the test database: %s' % e)
sys.exit(2)