306 lines
14 KiB
Python
306 lines
14 KiB
Python
import sys
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import time
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from django.conf import settings
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from django.db.backends.base.creation import BaseDatabaseCreation
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from django.db.utils import DatabaseError
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from django.utils.six.moves import input
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TEST_DATABASE_PREFIX = 'test_'
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PASSWORD = 'Im_a_lumberjack'
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class DatabaseCreation(BaseDatabaseCreation):
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def _create_test_db(self, verbosity=1, autoclobber=False, keepdb=False):
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parameters = self._get_test_db_params()
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cursor = self.connection.cursor()
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if self._test_database_create():
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try:
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self._execute_test_db_creation(cursor, parameters, verbosity)
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except Exception as e:
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# if we want to keep the db, then no need to do any of the below,
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# just return and skip it all.
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if keepdb:
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return
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sys.stderr.write("Got an error creating the test database: %s\n" % e)
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if not autoclobber:
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confirm = input(
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"It appears the test database, %s, already exists. "
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"Type 'yes' to delete it, or 'no' to cancel: " % parameters['user'])
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if autoclobber or confirm == 'yes':
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if verbosity >= 1:
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print("Destroying old test database '%s'..." % self.connection.alias)
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try:
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self._execute_test_db_destruction(cursor, parameters, verbosity)
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except DatabaseError as e:
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if 'ORA-29857' in str(e):
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self._handle_objects_preventing_db_destruction(cursor, parameters,
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verbosity, autoclobber)
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else:
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# Ran into a database error that isn't about leftover objects in the tablespace
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sys.stderr.write("Got an error destroying the old test database: %s\n" % e)
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sys.exit(2)
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except Exception as e:
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sys.stderr.write("Got an error destroying the old test database: %s\n" % e)
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sys.exit(2)
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try:
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self._execute_test_db_creation(cursor, parameters, verbosity)
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except Exception as e:
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sys.stderr.write("Got an error recreating the test database: %s\n" % e)
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sys.exit(2)
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else:
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print("Tests cancelled.")
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sys.exit(1)
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if self._test_user_create():
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if verbosity >= 1:
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print("Creating test user...")
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try:
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self._create_test_user(cursor, parameters, verbosity)
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except Exception as e:
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sys.stderr.write("Got an error creating the test user: %s\n" % e)
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if not autoclobber:
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confirm = input(
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"It appears the test user, %s, already exists. Type "
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"'yes' to delete it, or 'no' to cancel: " % parameters['user'])
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if autoclobber or confirm == 'yes':
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try:
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if verbosity >= 1:
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print("Destroying old test user...")
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self._destroy_test_user(cursor, parameters, verbosity)
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if verbosity >= 1:
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print("Creating test user...")
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self._create_test_user(cursor, parameters, verbosity)
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except Exception as e:
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sys.stderr.write("Got an error recreating the test user: %s\n" % e)
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sys.exit(2)
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else:
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print("Tests cancelled.")
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sys.exit(1)
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self.connection.close() # done with main user -- test user and tablespaces created
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real_settings = settings.DATABASES[self.connection.alias]
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real_settings['SAVED_USER'] = self.connection.settings_dict['SAVED_USER'] = \
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self.connection.settings_dict['USER']
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real_settings['SAVED_PASSWORD'] = self.connection.settings_dict['SAVED_PASSWORD'] = \
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self.connection.settings_dict['PASSWORD']
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real_test_settings = real_settings['TEST']
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test_settings = self.connection.settings_dict['TEST']
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real_test_settings['USER'] = real_settings['USER'] = test_settings['USER'] = \
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self.connection.settings_dict['USER'] = parameters['user']
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real_settings['PASSWORD'] = self.connection.settings_dict['PASSWORD'] = parameters['password']
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return self.connection.settings_dict['NAME']
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def _handle_objects_preventing_db_destruction(self, cursor, parameters, verbosity, autoclobber):
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# There are objects in the test tablespace which prevent dropping it
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# The easy fix is to drop the test user -- but are we allowed to do so?
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print("There are objects in the old test database which prevent its destruction.")
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print("If they belong to the test user, deleting the user will allow the test "
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"database to be recreated.")
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print("Otherwise, you will need to find and remove each of these objects, "
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"or use a different tablespace.\n")
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if self._test_user_create():
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if not autoclobber:
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confirm = input("Type 'yes' to delete user %s: " % parameters['user'])
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if autoclobber or confirm == 'yes':
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try:
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if verbosity >= 1:
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print("Destroying old test user...")
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self._destroy_test_user(cursor, parameters, verbosity)
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except Exception as e:
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sys.stderr.write("Got an error destroying the test user: %s\n" % e)
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sys.exit(2)
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try:
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if verbosity >= 1:
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print("Destroying old test database '%s'..." % self.connection.alias)
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self._execute_test_db_destruction(cursor, parameters, verbosity)
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except Exception as e:
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sys.stderr.write("Got an error destroying the test database: %s\n" % e)
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sys.exit(2)
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else:
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print("Tests cancelled -- test database cannot be recreated.")
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sys.exit(1)
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else:
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print("Django is configured to use pre-existing test user '%s',"
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" and will not attempt to delete it.\n" % parameters['user'])
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print("Tests cancelled -- test database cannot be recreated.")
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sys.exit(1)
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def _destroy_test_db(self, test_database_name, verbosity=1):
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"""
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Destroy a test database, prompting the user for confirmation if the
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database already exists. Returns the name of the test database created.
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"""
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self.connection.settings_dict['USER'] = self.connection.settings_dict['SAVED_USER']
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self.connection.settings_dict['PASSWORD'] = self.connection.settings_dict['SAVED_PASSWORD']
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parameters = self._get_test_db_params()
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cursor = self.connection.cursor()
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time.sleep(1) # To avoid "database is being accessed by other users" errors.
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if self._test_user_create():
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if verbosity >= 1:
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print('Destroying test user...')
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self._destroy_test_user(cursor, parameters, verbosity)
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if self._test_database_create():
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if verbosity >= 1:
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print('Destroying test database tables...')
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self._execute_test_db_destruction(cursor, parameters, verbosity)
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self.connection.close()
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def _execute_test_db_creation(self, cursor, parameters, verbosity):
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if verbosity >= 2:
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print("_create_test_db(): dbname = %s" % parameters['user'])
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statements = [
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"""CREATE TABLESPACE %(tblspace)s
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DATAFILE '%(datafile)s' SIZE 20M
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REUSE AUTOEXTEND ON NEXT 10M MAXSIZE %(maxsize)s
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""",
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"""CREATE TEMPORARY TABLESPACE %(tblspace_temp)s
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TEMPFILE '%(datafile_tmp)s' SIZE 20M
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REUSE AUTOEXTEND ON NEXT 10M MAXSIZE %(maxsize_tmp)s
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""",
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]
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self._execute_statements(cursor, statements, parameters, verbosity)
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def _create_test_user(self, cursor, parameters, verbosity):
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if verbosity >= 2:
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print("_create_test_user(): username = %s" % parameters['user'])
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statements = [
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"""CREATE USER %(user)s
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IDENTIFIED BY %(password)s
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DEFAULT TABLESPACE %(tblspace)s
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TEMPORARY TABLESPACE %(tblspace_temp)s
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QUOTA UNLIMITED ON %(tblspace)s
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""",
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"""GRANT CREATE SESSION,
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CREATE TABLE,
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CREATE SEQUENCE,
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CREATE PROCEDURE,
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CREATE TRIGGER
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TO %(user)s""",
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]
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self._execute_statements(cursor, statements, parameters, verbosity)
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# Most test-suites can be run without the create-view privilege. But some need it.
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extra = "GRANT CREATE VIEW TO %(user)s"
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try:
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self._execute_statements(cursor, [extra], parameters, verbosity, allow_quiet_fail=True)
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except DatabaseError as err:
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description = str(err)
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if 'ORA-01031' in description:
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if verbosity >= 2:
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print("Failed to grant CREATE VIEW permission to test user. This may be ok.")
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else:
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raise
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def _execute_test_db_destruction(self, cursor, parameters, verbosity):
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if verbosity >= 2:
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print("_execute_test_db_destruction(): dbname=%s" % parameters['user'])
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statements = [
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'DROP TABLESPACE %(tblspace)s INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS',
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'DROP TABLESPACE %(tblspace_temp)s INCLUDING CONTENTS AND DATAFILES CASCADE CONSTRAINTS',
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]
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self._execute_statements(cursor, statements, parameters, verbosity)
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def _destroy_test_user(self, cursor, parameters, verbosity):
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if verbosity >= 2:
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print("_destroy_test_user(): user=%s" % parameters['user'])
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print("Be patient. This can take some time...")
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statements = [
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'DROP USER %(user)s CASCADE',
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]
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self._execute_statements(cursor, statements, parameters, verbosity)
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def _execute_statements(self, cursor, statements, parameters, verbosity, allow_quiet_fail=False):
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for template in statements:
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stmt = template % parameters
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if verbosity >= 2:
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print(stmt)
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try:
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cursor.execute(stmt)
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except Exception as err:
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if (not allow_quiet_fail) or verbosity >= 2:
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sys.stderr.write("Failed (%s)\n" % (err))
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raise
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def _get_test_db_params(self):
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return {
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'dbname': self._test_database_name(),
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'user': self._test_database_user(),
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'password': self._test_database_passwd(),
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'tblspace': self._test_database_tblspace(),
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'tblspace_temp': self._test_database_tblspace_tmp(),
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'datafile': self._test_database_tblspace_datafile(),
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'datafile_tmp': self._test_database_tblspace_tmp_datafile(),
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'maxsize': self._test_database_tblspace_size(),
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'maxsize_tmp': self._test_database_tblspace_tmp_size(),
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}
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def _test_settings_get(self, key, default=None, prefixed=None):
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"""
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Return a value from the test settings dict,
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or a given default,
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or a prefixed entry from the main settings dict
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"""
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settings_dict = self.connection.settings_dict
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val = settings_dict['TEST'].get(key, default)
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if val is None:
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val = TEST_DATABASE_PREFIX + settings_dict[prefixed]
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return val
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def _test_database_name(self):
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return self._test_settings_get('NAME', prefixed='NAME')
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def _test_database_create(self):
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return self._test_settings_get('CREATE_DB', default=True)
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def _test_user_create(self):
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return self._test_settings_get('CREATE_USER', default=True)
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def _test_database_user(self):
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return self._test_settings_get('USER', prefixed='USER')
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def _test_database_passwd(self):
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return self._test_settings_get('PASSWORD', default=PASSWORD)
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def _test_database_tblspace(self):
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return self._test_settings_get('TBLSPACE', prefixed='USER')
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def _test_database_tblspace_tmp(self):
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settings_dict = self.connection.settings_dict
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return settings_dict['TEST'].get('TBLSPACE_TMP',
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TEST_DATABASE_PREFIX + settings_dict['USER'] + '_temp')
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def _test_database_tblspace_datafile(self):
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tblspace = '%s.dbf' % self._test_database_tblspace()
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return self._test_settings_get('DATAFILE', default=tblspace)
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def _test_database_tblspace_tmp_datafile(self):
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tblspace = '%s.dbf' % self._test_database_tblspace_tmp()
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return self._test_settings_get('DATAFILE_TMP', default=tblspace)
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def _test_database_tblspace_size(self):
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return self._test_settings_get('DATAFILE_MAXSIZE', default='500M')
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def _test_database_tblspace_tmp_size(self):
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return self._test_settings_get('DATAFILE_TMP_MAXSIZE', default='500M')
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def _get_test_db_name(self):
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"""
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We need to return the 'production' DB name to get the test DB creation
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machinery to work. This isn't a great deal in this case because DB
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names as handled by Django haven't real counterparts in Oracle.
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"""
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return self.connection.settings_dict['NAME']
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def test_db_signature(self):
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settings_dict = self.connection.settings_dict
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return (
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settings_dict['HOST'],
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settings_dict['PORT'],
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settings_dict['ENGINE'],
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settings_dict['NAME'],
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self._test_database_user(),
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)
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