Thank you Mike, the composite joins look like something close to what I
need. However, it seems that they too require a mapped class for the
association table?
I tried
managed_teams = relationship("Team",
secondary=
"join(student_team_association.is_manager==true)",
backref="managers")
using the table name directly, but this gives me an error:
AttributeError: 'Table' object has no attribute 'is_manager'
which I suspect indicates that the join expected a mapped class rather than
a table name?
Thanks!
On Thursday, June 15, 2017 at 7:05:45 AM UTC+10, Mike Bayer wrote:
>
>
> On 06/14/2017 04:54 PM, jens.t...@gmail.com <javascript:> wrote:
> > […]
> >
> > # Filtered association that lists only managed teams. The tuple maps
> > # the column to the value and would translate to a WHERE.
> > managed_teams =relationship("Team",
> >
> secondary=user_team_association_table,
> > backref="managers",
> > filter=("is_manager",True))
>
>
> you use a custom primaryjoin / secondaryjoin for this
>
> see http://docs.sqlalchemy.org/en/latest/orm/join_conditions.html
>
>
> http://docs.sqlalchemy.org/en/latest/orm/join_conditions.html#composite-secondary-joins
>
>
> etc
>
>
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