server.py 文件源码

def get_db():
    # check if _database attribute exist
    db = getattr(g, '_database', None)
    if db is None:
        # if doesnt, establish a new connection and save _database attribute
        # this prevents multiple instances to the database
        db = g._database = sql.connect(DATABASE)
        db.row_factory = sql.Row 
    return db

# @function for querying/retrieving database