> -----Original Message----- > From: sqlalchemy@googlegroups.com [mailto:sqlalchemy@googlegroups.com] > On Behalf Of farcat > Sent: 16 March 2011 21:01 > To: sqlalchemy > Subject: [sqlalchemy] trouble with metaclass > > I have an error i cant figure out (likely a beginners error): > > #-------------------------------------------------------- > Base = declarative_base() > > class tablemeta(DeclarativeMeta): > def __new__(mcls, name): > return DeclarativeMeta.__new__(mcls, name, (Base,), {}) > def _init__(cls, name): > temp = dict() > temp["__tablename__"] = "_" + name > temp["id"] = Column(Integer, primary_key = True) > temp["text"] = Column(String(120)) > DeclarativeMeta.__init__(cls, name, (Base,), temp) > > > if __name__ == "__main__": > engine = create_engine('sqlite:///:memory:', echo=True) > Base.metadata.drop_all(engine) > Base.metadata.create_all(engine) > Session = sessionmaker(bind=engine) > session = Session() > table1 = tablemeta("table1") #=> ERROR > row1 = table1(text = "detextenzo") > row2 = table1(text = "detextenzoennogeenbeetje") > session.commit() > list = session.query(table1).all() > for l in list: > print str(l) > print "done" > > #-------------------------------------------------------- > the error is: > #-------------------------------------------------------- > Traceback (most recent call last): > File "D:\Documents\Code\NetBeans\test\temp\src\temp.py", line 33, > in > <module> > table1 = tablemeta("table1") > TypeError: __init__() takes exactly 4 arguments (2 given) > #-------------------------------------------------------- > > I do not understand what __init__ i am miscalling: I call > tablemeta.__init__ with 2 (1 implicit) as defined and > DeclarativeMeta.__init__ with 4 as defined? > > please help ... >
I'm not sure if it's the cause of your problem, but you have a typo in tablemeta - your __init__ only has 1 underscore at the beginning... Hope that helps, Simon -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
