On Sep 24, 2012, at 11:16 AM, John Anderson wrote: > If I have a DB structure similar to this: > > class Parent(Base): > pass > > class Child(Base): > parent = relation(Parent, backref='children') > > > and I have an instanced of Parent and want to figure out what the > class of instance.children is, how would I do that?
by "class of instance.children", I assume you're looking for "Child", not the type of collection (set, list) and not some specific subtype of objects within the collection (since there could be many). So this is a class-level attribute, given Parent. If you have an instance of Parent, and you don't know that it's Parent, you'd call type(my_instance) to get the class first. Assuming we are that far: up through 0.7: property = Parent.children.property target_class = property.mapper.class_ in 0.8, the above, or also: from sqlalchemy import inspect property = inspect(Parent.children) target_class = property.mapper.class_ > > -- > 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. > -- 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.
