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