So you're still disagreeing with Jason, who's quite explicitly saying that SA's __init__ will blow up if it gets called. Which of you is right? :)
At 11:38 AM 3/28/2008 -0400, Michael Bayer wrote: >On Mar 28, 2008, at 10:58 AM, Phillip J. Eby wrote: > > >> > >> Sorry, I should have included more detail. You don't want to trigger > >> the logic in SA's __init__ decorator or call the user's __init__. > >> The > >> ORM policy is not to __init__ on load, and will soon support a > >> symmetric > >> "__on_load__" type of hook that the ORM can call post-__new__ when > >> reconstituting instances. > > > > So, which one of you is right? :) > >Well, I'm not entirely sure how your users will be using their >objects. If they just want to take any old application and enable >trellis + sqlalchemy, if they are accustomed to writing for SA then it >would be a surprise for their __init__() method to be called. Like, >if I wrote a class like this: > >class MyClass(object): > def __init__(self, a, b): > self.a = a > self.b = b > > >then I mapped it to Trellis + SQLA, we *can't* call MyClass() upon >load from the database - we dont have the constructor arguments >available and TypeError will be thrown. > >If OTOH, using Trellis implies that you must already have an >__init__() that is compatible with a no-arg calling style and that >they should expect population of attributes to occur after it's >called, then theres no issue with configuring the SA mappings to call >__init__(). > >I think you mentioned earlier that Trellis "doesn't care" what the >user does with __init__()....neither does SQLAlchemy, and thats why we >never call it by default with no args, since we make no assumptions >about what it expects or what it does. --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
