Re: [Sqlalchemy-tickets] [sqlalchemy] #2872: AliasedClass.__getattr__() creates malformed QueryableAttribute

[sqlalchemy <mi...@zz...>]

#2872: AliasedClass.__getattr__() creates malformed QueryableAttribute
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      Reporter:  elic      |      Owner:  zzzeek
          Type:  defect    |     Status:  new
      Priority:  high      |  Milestone:  0.9.0
     Component:  orm       |   Severity:  major - 1-3 hours
    Resolution:            |   Keywords:
Progress State:  in queue  |
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Comment (by zzzeek):

 > To explain the metaclass: it's being used to intercept the class-
 setattr() call made by ClassManager.instrument_attribute(), and store the
 InstrumentedAttribute internally.

 yeah you can use ext.instrumentation for that, but if you only need to
 detect it as an event and not actually change the end result of
 instrument_attribute, you can just use a straight event:
 http://docs.sqlalchemy.org/en/rel_0_9/orm/events.html#sqlalchemy.orm.events.InstrumentationEvents.attribute_instrument
 (seems like the docstring there is missing or broken, but you get the
 idea).

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2872#comment:5>
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