def __init__(self, *args, **kwargs):
super(DatabaseWrapper, self).__init__(*args, **kwargs)
if kwargs.get('alias', '') != NO_DB_ALIAS:
self.features = DatabaseFeatures(self)
self.creation = PostGISCreation(self)
self.ops = PostGISOperations(self)
self.introspection = PostGISIntrospection(self)
def handle(self, *args, **options):
"""
Resets the database for this project.
Note: Transaction wrappers are in reverse as a work around for
autocommit, anybody know how to do this the right way?
"""
if args:
raise CommandError("reset_db takes no arguments")
router = options.get('router')
dbinfo = settings.DATABASES.get(router)
if dbinfo is None:
raise CommandError("Unknown database router %s" % router)
engine = dbinfo.get('ENGINE').split('.')[-1]
user = password = database_name = ''
if engine == 'mysql':
read_default_file = dbinfo.get('OPTIONS',
{}).get('read_default_file')
if read_default_file:
config = configparser.ConfigParser()
config.read(read_default_file)
user = config.get('client', 'user')
password = config.get('client', 'password')
database_name = config.get('client', 'database')
user = options.get('user') or dbinfo.get('USER') or user
password = options.get('password') or dbinfo.get(
'PASSWORD') or password
owner = options.get('owner') or user
database_name = options.get('dbname') or dbinfo.get(
'NAME') or database_name
if database_name == '':
raise CommandError(
"You need to specify DATABASE_NAME in your Django settings file."
)
database_host = dbinfo.get('HOST')
database_port = dbinfo.get('PORT')
verbosity = int(options.get('verbosity', 1))
if options.get('interactive'):
confirm = input("""
You have requested a database reset.
This will IRREVERSIBLY DESTROY
ALL data in the database "%s".
Are you sure you want to do this?
Type 'yes' to continue, or 'no' to cancel: """ % (database_name, ))
else:
confirm = 'yes'
if confirm != 'yes':
print("Reset cancelled.")
return
if engine in ('sqlite3', 'spatialite'):
import os
try:
logging.info("Unlinking %s database" % engine)
os.unlink(database_name)
except OSError:
pass
elif engine in ('mysql', ):
import MySQLdb as Database
kwargs = {
'user': user,
'passwd': password,
}
if database_host.startswith('/'):
kwargs['unix_socket'] = database_host
else:
kwargs['host'] = database_host
if database_port:
kwargs['port'] = int(database_port)
connection = Database.connect(**kwargs)
drop_query = 'DROP DATABASE IF EXISTS `%s`' % database_name
utf8_support = options.get('no_utf8_support',
False) and '' or 'CHARACTER SET utf8'
create_query = 'CREATE DATABASE `%s` %s' % (database_name,
utf8_support)
logging.info('Executing... "' + drop_query + '"')
connection.query(drop_query)
logging.info('Executing... "' + create_query + '"')
connection.query(create_query)
elif engine in ('postgresql', 'postgresql_psycopg2', 'postgis'):
if engine == 'postgresql' and django.VERSION < (1, 9):
import psycopg as Database # NOQA
elif engine in ('postgresql', 'postgresql_psycopg2', 'postgis'):
import psycopg2 as Database # NOQA
conn_string = "dbname=template1"
if user:
conn_string += " user=%s" % user
if password:
conn_string += " password='******'" % password
if database_host:
conn_string += " host=%s" % database_host
if database_port:
conn_string += " port=%s" % database_port
connection = Database.connect(conn_string)
connection.set_isolation_level(0) # autocommit false
cursor = connection.cursor()
drop_query = "DROP DATABASE \"%s\";" % database_name
logging.info('Executing... "' + drop_query + '"')
try:
cursor.execute(drop_query)
except Database.ProgrammingError as e:
logging.exception("Error: %s" % str(e))
create_query = "CREATE DATABASE \"%s\"" % database_name
if owner:
create_query += " WITH OWNER = \"%s\" " % owner
create_query += " ENCODING = 'UTF8'"
if engine == 'postgis':
# fetch postgis template name if it exists
from django.contrib.gis.db.backends.postgis.creation import PostGISCreation
postgis_template = PostGISCreation(connection).template_postgis
if postgis_template is not None:
create_query += ' TEMPLATE = %s' % postgis_template
if settings.DEFAULT_TABLESPACE:
create_query += ' TABLESPACE = %s;' % settings.DEFAULT_TABLESPACE
else:
create_query += ';'
logging.info('Executing... "' + create_query + '"')
cursor.execute(create_query)
else:
raise CommandError("Unknown database engine %s" % engine)
if verbosity >= 2 or options.get('interactive'):
print("Reset successful.")
def __init__(self, *args, **kwargs):
super(DatabaseWrapper, self).__init__(*args, **kwargs)
self.creation = PostGISCreation(self)
self.ops = PatchedPostGISOperations(self)
self.introspection = PostGISIntrospection(self)
