pokedex/db/__init__.py

   1 from sqlalchemy import MetaData, Table, create_engine, orm
   2
   3 from .tables import metadata
   4
   5 def connect(uri, **kwargs):
   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, and
  19         # use UTF-8 goddammit!
  20         for table in metadata.tables.values():
  21             table.kwargs['mysql_engine'] = 'InnoDB'
  22             table.kwargs['mysql_charset'] = 'utf8'
  23
  24     ### Connect
  25     engine = create_engine(uri)
  26     conn = engine.connect()
  27     metadata.bind = engine
  28
  29     session_args = dict(autoflush=True, autocommit=False, bind=engine)
  30     session_args.update(kwargs)
  31     sm = orm.sessionmaker(**session_args)
  32     session = orm.scoped_session(sm)
  33
  34     return session