275 lines
12 KiB
Python
275 lines
12 KiB
Python
import sys
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import time
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from django.db.backends.creation import BaseDatabaseCreation
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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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# This dictionary maps Field objects to their associated Oracle column
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# types, as strings. Column-type strings can contain format strings; they'll
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# be interpolated against the values of Field.__dict__ before being output.
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# If a column type is set to None, it won't be included in the output.
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#
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# Any format strings starting with "qn_" are quoted before being used in the
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# output (the "qn_" prefix is stripped before the lookup is performed.
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data_types = {
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'AutoField': 'NUMBER(11)',
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'BooleanField': 'NUMBER(1) CHECK (%(qn_column)s IN (0,1))',
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'CharField': 'NVARCHAR2(%(max_length)s)',
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'CommaSeparatedIntegerField': 'VARCHAR2(%(max_length)s)',
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'DateField': 'DATE',
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'DateTimeField': 'TIMESTAMP',
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'DecimalField': 'NUMBER(%(max_digits)s, %(decimal_places)s)',
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'FileField': 'NVARCHAR2(%(max_length)s)',
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'FilePathField': 'NVARCHAR2(%(max_length)s)',
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'FloatField': 'DOUBLE PRECISION',
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'IntegerField': 'NUMBER(11)',
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'BigIntegerField': 'NUMBER(19)',
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'IPAddressField': 'VARCHAR2(15)',
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'GenericIPAddressField': 'VARCHAR2(39)',
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'NullBooleanField': 'NUMBER(1) CHECK ((%(qn_column)s IN (0,1)) OR (%(qn_column)s IS NULL))',
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'OneToOneField': 'NUMBER(11)',
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'PositiveIntegerField': 'NUMBER(11) CHECK (%(qn_column)s >= 0)',
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'PositiveSmallIntegerField': 'NUMBER(11) CHECK (%(qn_column)s >= 0)',
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'SlugField': 'NVARCHAR2(%(max_length)s)',
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'SmallIntegerField': 'NUMBER(11)',
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'TextField': 'NCLOB',
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'TimeField': 'TIMESTAMP',
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'URLField': 'VARCHAR2(%(max_length)s)',
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}
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def __init__(self, connection):
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super(DatabaseCreation, self).__init__(connection)
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def _create_test_db(self, verbosity=1, autoclobber=False):
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TEST_NAME = self._test_database_name()
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TEST_USER = self._test_database_user()
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TEST_PASSWD = self._test_database_passwd()
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TEST_TBLSPACE = self._test_database_tblspace()
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TEST_TBLSPACE_TMP = self._test_database_tblspace_tmp()
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parameters = {
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'dbname': TEST_NAME,
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'user': TEST_USER,
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'password': TEST_PASSWD,
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'tblspace': TEST_TBLSPACE,
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'tblspace_temp': TEST_TBLSPACE_TMP,
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}
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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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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 = raw_input("It appears the test database, %s, already exists. Type 'yes' to delete it, or 'no' to cancel: " % TEST_NAME)
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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 database '%s'..." % self.connection.alias)
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self._execute_test_db_destruction(cursor, parameters, verbosity)
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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 = raw_input("It appears the test user, %s, already exists. Type 'yes' to delete it, or 'no' to cancel: " % TEST_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.settings_dict['SAVED_USER'] = self.connection.settings_dict['USER']
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self.connection.settings_dict['SAVED_PASSWORD'] = self.connection.settings_dict['PASSWORD']
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self.connection.settings_dict['TEST_USER'] = self.connection.settings_dict['USER'] = TEST_USER
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self.connection.settings_dict['PASSWORD'] = TEST_PASSWD
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return self.connection.settings_dict['NAME']
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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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TEST_NAME = self._test_database_name()
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TEST_USER = self._test_database_user()
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TEST_PASSWD = self._test_database_passwd()
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TEST_TBLSPACE = self._test_database_tblspace()
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TEST_TBLSPACE_TMP = self._test_database_tblspace_tmp()
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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 = {
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'dbname': TEST_NAME,
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'user': TEST_USER,
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'password': TEST_PASSWD,
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'tblspace': TEST_TBLSPACE,
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'tblspace_temp': TEST_TBLSPACE_TMP,
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}
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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['dbname'])
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statements = [
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"""CREATE TABLESPACE %(tblspace)s
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DATAFILE '%(tblspace)s.dbf' SIZE 20M
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REUSE AUTOEXTEND ON NEXT 10M MAXSIZE 200M
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""",
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"""CREATE TEMPORARY TABLESPACE %(tblspace_temp)s
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TEMPFILE '%(tblspace_temp)s.dbf' SIZE 20M
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REUSE AUTOEXTEND ON NEXT 10M MAXSIZE 100M
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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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""",
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"""GRANT CONNECT, RESOURCE TO %(user)s""",
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]
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self._execute_statements(cursor, statements, parameters, verbosity)
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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['dbname'])
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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):
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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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sys.stderr.write("Failed (%s)\n" % (err))
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raise
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def _test_database_name(self):
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name = TEST_DATABASE_PREFIX + self.connection.settings_dict['NAME']
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try:
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if self.connection.settings_dict['TEST_NAME']:
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name = self.connection.settings_dict['TEST_NAME']
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except AttributeError:
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pass
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return name
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def _test_database_create(self):
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return self.connection.settings_dict.get('TEST_CREATE', True)
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def _test_user_create(self):
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return self.connection.settings_dict.get('TEST_USER_CREATE', True)
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def _test_database_user(self):
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name = TEST_DATABASE_PREFIX + self.connection.settings_dict['USER']
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try:
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if self.connection.settings_dict['TEST_USER']:
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name = self.connection.settings_dict['TEST_USER']
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except KeyError:
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pass
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return name
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def _test_database_passwd(self):
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name = PASSWORD
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try:
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if self.connection.settings_dict['TEST_PASSWD']:
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name = self.connection.settings_dict['TEST_PASSWD']
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except KeyError:
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pass
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return name
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def _test_database_tblspace(self):
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name = TEST_DATABASE_PREFIX + self.connection.settings_dict['NAME']
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try:
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if self.connection.settings_dict['TEST_TBLSPACE']:
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name = self.connection.settings_dict['TEST_TBLSPACE']
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except KeyError:
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pass
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return name
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def _test_database_tblspace_tmp(self):
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name = TEST_DATABASE_PREFIX + self.connection.settings_dict['NAME'] + '_temp'
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try:
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if self.connection.settings_dict['TEST_TBLSPACE_TMP']:
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name = self.connection.settings_dict['TEST_TBLSPACE_TMP']
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except KeyError:
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pass
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return name
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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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def set_autocommit(self):
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self.connection.connection.autocommit = True
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