Ahh!! Starting to understand it. In this case, the entire expression to
primaryjoin must be a string. The explanation about eval'ing the string when
mappers are compiled makes sense.
Now I see the relation in GHZ's example and in the code I will be writing
should look something like this.
boston_
Mike Conley wrote:
> I was getting ready to do something similar, and now I am confused.
>
> How is what GHZ is doing fundamentally different from the documentation
> example "Specifying Alternate Join Conditions to relation()"? Doesn't that
> example wrap the primaryjoin in the and_() construct a
I was getting ready to do something similar, and now I am confused.
How is what GHZ is doing fundamentally different from the documentation
example "Specifying Alternate Join Conditions to relation()"? Doesn't that
example wrap the primaryjoin in the and_() construct also?
http://www.sqlalchemy.o
GHZ wrote:
>
> boston_addresses = relation('Address',
>primaryjoin = and_
> ('User.user_id==Address.user_id',
>
> 'Address.city=="Boston"'),
>foreign_keys = ['Address.user_id'])
the expression sent to primaryjoin must be an expr
