> -----Original Message----- > From: sqlalchemy@googlegroups.com > [mailto:sqlalch...@googlegroups.com] On Behalf Of Martijn Moeling > Sent: 15 October 2009 15:38 > To: sqlalchemy@googlegroups.com > Subject: [sqlalchemy] Re: Declerative Relation trouble > > Hi Simon, > > > (I do things a little different on the import side) > Working example (very minimised): > > > from sqlalchemy import > Integer,Column,DateTime,Unicode,UnicodeText,Boolean,ForeignKey > ,Interval > from sqlalchemy.ext.declarative import declarative_base > import sqlalchemy.orm as orm > Base = declarative_base() > > > class Event(Base): > __tablename__ = "CalendarEvents" > Id = Column(Integer, primary_key=True) > CalendarId = Column(ForeignKey('Calendars.Id')) > > > class Calendar(Base): > __tablename__ = "Calendars" > Id = Column(Integer, primary_key=True) > UserId = Column(Integer, index=True) > ProdId = Column(Unicode(255)) > Version = Column(Unicode(5)) > CalScale = Column(Unicode(20)) > Method = Column(Unicode(10)) > Events = > orm.relation(Event,backref='Calendar')#, cascade="all") > > if __name__ == '__main__': > engine = create_engine('sqlite:///') > Base.metadata.create_all(bind=engine) > Session = orm.sessionmaker(bind=engine)() > > cal = Calendar() > > when I run this I get: > > > Traceback (most recent call last): > File "/var/www/PyWebOs/caltst.py", line 28, in <module> > cal = Calendar() > File "<string>", line 4, in __init__ > File > "/usr/local/lib/python2.6/site-packages/sqlalchemy/orm/state.p > y", line 71, in initialize_instance > fn(self, instance, args, kwargs) > File > "/usr/local/lib/python2.6/site-packages/sqlalchemy/orm/mapper. > py", line 1810, in _event_on_init > instrumenting_mapper.compile() > File > "/usr/local/lib/python2.6/site-packages/sqlalchemy/orm/mapper. > py", line 666, in compile > "Message was: %s" % mapper._compile_failed) > InvalidRequestError: One or more mappers failed to compile. > Exception was probably suppressed within a hasattr() call. > Message was: One or more mappers failed to compile. > Exception was probably suppressed within a hasattr() call. > Message was: One or more mappers failed to compile. > Exception was probably suppressed within a hasattr() call. > Message was: Could not find table 'Calendar' with which to > generate a foreign key > > > which is excacly the same as I got..... > > > I have done so mutch in python/sqlalchemy that I feel > extremely stupid not to get this working, it might be just a > case of "overreading" the problem > > > Martijn >
That script works for me (I needed to add 'create_engine' to the import line) on SQLAlchemy 0.5.5. How are you running it? 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 -~----------~----~----~----~------~----~------~--~---
