pokedex/db/__init__.py

   1 from sqlalchemy import MetaData, Table, create_engine, orm
   2
   3 from .tables import metadata
   4
   5 def connect(uri):
   6     """Connects to the requested URI.  Returns a session object.
   7
   8     Calling this function also binds the metadata object to the created engine.
   9     """
  10
  11     ### Do some fixery for MySQL
  12     if uri[0:5] == 'mysql':
  13         # MySQL uses latin1 for connections by default even if the server is
  14         # otherwise oozing with utf8; charset fixes this
  15         if 'charset' not in uri:
  16             uri += '?charset=utf8'
  17
  18         # Tables should be InnoDB, in the event that we're creating them
  19         for table in metadata.tables.values():
  20             table.kwargs['mysql_engine'] = 'InnoDB'
  21
  22     ### Connect
  23     engine = create_engine(uri)
  24     conn = engine.connect()
  25     metadata.bind = engine
  26
  27     sm = orm.sessionmaker(autoflush=True, autocommit=False, bind=engine)
  28     session = orm.scoped_session(sm)
  29
  30     return session