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try:
from urlparse import urlparse, parse_qsl
except ImportError:
from urllib.parse import urlparse, parse_qsl
from peewee import *
from playhouse.pool import PooledMySQLDatabase
from playhouse.pool import PooledPostgresqlDatabase
from playhouse.pool import PooledSqliteDatabase
from playhouse.pool import PooledSqliteExtDatabase
from playhouse.sqlite_ext import SqliteExtDatabase
schemes = {
'mysql': MySQLDatabase,
'mysql+pool': PooledMySQLDatabase,
'postgres': PostgresqlDatabase,
'postgresql': PostgresqlDatabase,
'postgres+pool': PooledPostgresqlDatabase,
'postgresql+pool': PooledPostgresqlDatabase,
'sqlite': SqliteDatabase,
'sqliteext': SqliteExtDatabase,
'sqlite+pool': PooledSqliteDatabase,
'sqliteext+pool': PooledSqliteExtDatabase,
}
def register_database(db_class, *names):
global schemes
for name in names:
schemes[name] = db_class
def parseresult_to_dict(parsed):
# urlparse in python 2.6 is broken so query will be empty and instead
# appended to path complete with '?'
path_parts = parsed.path[1:].split('?')
try:
query = path_parts[1]
except IndexError:
query = parsed.query
connect_kwargs = {'database': path_parts[0]}
if parsed.username:
connect_kwargs['user'] = parsed.username
if parsed.password:
connect_kwargs['password'] = parsed.password
if parsed.hostname:
connect_kwargs['host'] = parsed.hostname
if parsed.port:
connect_kwargs['port'] = parsed.port
# Adjust parameters for MySQL.
if parsed.scheme == 'mysql' and 'password' in connect_kwargs:
connect_kwargs['passwd'] = connect_kwargs.pop('password')
elif 'sqlite' in parsed.scheme and not connect_kwargs['database']:
connect_kwargs['database'] = ':memory:'
# Get additional connection args from the query string
qs_args = parse_qsl(query, keep_blank_values=True)
for key, value in qs_args:
if value.lower() == 'false':
value = False
elif value.lower() == 'true':
value = True
elif value.isdigit():
value = int(value)
elif '.' in value and all(p.isdigit() for p in value.split('.', 1)):
try:
value = float(value)
except ValueError:
pass
elif value.lower() in ('null', 'none'):
value = None
connect_kwargs[key] = value
return connect_kwargs
def parse(url):
parsed = urlparse(url)
return parseresult_to_dict(parsed)
def connect(url, **connect_params):
parsed = urlparse(url)
connect_kwargs = parseresult_to_dict(parsed)
connect_kwargs.update(connect_params)
database_class = schemes.get(parsed.scheme)
if database_class is None:
if database_class in schemes:
raise RuntimeError('Attempted to use "%s" but a required library '
'could not be imported.' % parsed.scheme)
else:
raise RuntimeError('Unrecognized or unsupported scheme: "%s".' %
parsed.scheme)
return database_class(**connect_kwargs)
# Conditionally register additional databases.
try:
from playhouse.pool import PooledPostgresqlExtDatabase
except ImportError:
pass
else:
register_database(
PooledPostgresqlExtDatabase,
'postgresext+pool',
'postgresqlext+pool')
try:
from playhouse.apsw_ext import APSWDatabase
except ImportError:
pass
else:
register_database(APSWDatabase, 'apsw')
try:
from playhouse.berkeleydb import BerkeleyDatabase
except ImportError:
pass
else:
register_database(BerkeleyDatabase, 'berkeleydb')
try:
from playhouse.postgres_ext import PostgresqlExtDatabase
except ImportError:
pass
else:
register_database(PostgresqlExtDatabase, 'postgresext', 'postgresqlext')
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