55 lines
1.5 KiB
Python
55 lines
1.5 KiB
Python
|
import sqlalchemy
|
||
|
|
import cherrypy
|
||
|
|
from cherrypy.process import plugins
|
||
|
|
from sqlalchemy.ext.declarative import declarative_base
|
||
|
|
|
||
|
|
|
||
|
|
Base = declarative_base()
|
||
|
|
|
||
|
|
|
||
|
|
def db():
|
||
|
|
return cherrypy.request.db
|
||
|
|
|
||
|
|
|
||
|
|
class SAEnginePlugin(plugins.SimplePlugin):
|
||
|
|
def __init__(self, bus, dbcon):
|
||
|
|
plugins.SimplePlugin.__init__(self, bus)
|
||
|
|
self.sa_engine = dbcon
|
||
|
|
self.bus.subscribe("bind", self.bind)
|
||
|
|
|
||
|
|
def start(self):
|
||
|
|
Base.metadata.create_all(self.sa_engine)
|
||
|
|
|
||
|
|
def bind(self, session):
|
||
|
|
session.configure(bind=self.sa_engine)
|
||
|
|
|
||
|
|
|
||
|
|
class SATool(cherrypy.Tool):
|
||
|
|
def __init__(self):
|
||
|
|
cherrypy.Tool.__init__(self, 'before_request_body',
|
||
|
|
self.bind_session,
|
||
|
|
priority=100)
|
||
|
|
|
||
|
|
self.session = sqlalchemy.orm.scoped_session(
|
||
|
|
sqlalchemy.orm.sessionmaker(autoflush=True, autocommit=False))
|
||
|
|
|
||
|
|
def _setup(self):
|
||
|
|
cherrypy.Tool._setup(self)
|
||
|
|
cherrypy.request.hooks.attach('on_end_resource', self.commit_transaction, priority=80)
|
||
|
|
|
||
|
|
def bind_session(self):
|
||
|
|
cherrypy.engine.publish('bind', self.session)
|
||
|
|
cherrypy.request.db = self.session
|
||
|
|
con = cherrypy.request.db.connection().connection.connection
|
||
|
|
if hasattr(con, "ping"): # not available on sqlite
|
||
|
|
con.ping()
|
||
|
|
|
||
|
|
def commit_transaction(self):
|
||
|
|
cherrypy.request.db = None
|
||
|
|
try:
|
||
|
|
self.session.commit()
|
||
|
|
except Exception:
|
||
|
|
self.session.rollback()
|
||
|
|
raise
|
||
|
|
finally:
|
||
|
|
self.session.remove()
|