limscoder wrote:
>
> In 5.2 I was able to map a base-class, and sub-classes would
> automatically be persisted as the base type. In 5.3 I get an
> UnmappedInstanceError when trying to persist an object of the sub-
> class type. I didn't see anything about this change in the changelog.
> Is there a way to get the <5.3 behavior?
this behavior isn't supported since if you said:
class MySubClass(MyMappedClass):
def __init__(self):
self.foo = 'foo'
the class no longer has the proper instrumentation on the __init__ method.
the solution is to map your subclass. this is automatic if you use
declarative. in any case, no table is needed:
mapper(MySubClass, inherits=MyMappedClass)
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