In sqlalchemy, how can I use polymorphic joined table inheritance when the child table has multiple foreign keys to the parent table?



I have a parent table called pbx_point that has a point_type column. I also have a child table called pbx_route, with a column called point_id pointing back to pbx_point.


I'd like to use sqlalchemy's joined table inheritance to relate these two tables via declarative base, and use polymorphic inheritance


This works fine - or rather, it would, if not for the following additional constraint: pbx_point also has a foreign key called initial_route_id pointing to pbx_route.


I'm also using reflection below, but the db is as I describ


Related to : In sqlalchemy, how can I use polymorphic joined table inheritance when the child table has multiple foreign keys to the parent table?
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I have a workorder system using SQL Express 2008. I have a table called Workorders that has several personnel that are linked to it via UserID. In the Workorder table I have TechID for the Technician, CustomerID for the Customer, QAID for quality assurance. These are linked back to the User Table via UserID (User Table PK). I want to join the tables to return Technician Name, Customer Name, and QA Name from the User Table and other job information information from the Workorder Table. I have no idea how to construct the join.


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Can anybody tell whether a foreign key in a child table, can automatically get the value it actually has in the parent table?
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First off, sorry if it turns out that what I'm trying to do is smoke crack here, I'm by no means a DB or SQLA expert. =)


I have two classes, Person and Organization, that use table inheritance to inherit from Contact. ( Person.id is an fkey to Contact.id ), which is working fine.


I want to search from a search box and get a list of all contacts. Normally, when I'm after a set of things, I do this:


def build_query(self):
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def filter_query(self, query)
    if self.search_form_values.get('name_last',None):
        query = query.filter(
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class Foo(Base):
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