On Fri, Dec 28, 2018 at 9:21 AM Mehdi Gmira wrote:
>
> I have one example illustrating that A.b.id does not pick up the correct id
okey doke, set that all up explicitly as below, will update the
example now, thanks for the complete test
B_viacd = mapper(B, j, non_primary=True,
I have one example illustrating that A.b.id does not pick up the correct id
from sqlalchemy import Column, DateTime, String, Integer, ForeignKey,
func, Table, create_engine, join
from sqlalchemy.orm import relationship, backref, sessionmaker,
joinedload, contains_eager, mapper
from
On Fri, Dec 28, 2018 at 4:24 AM Mehdi Gmira wrote:
>
> Thanks for the reply. There is something I don't understand in the example:
>
> B_viacd = mapper(B, j, non_primary=True, properties={
> "b_id": [j.c.b_id, j.c.d_b_id],
> "d_id": j.c.d_id
> })
>
>
> How Is the mapper supposed to
Thanks for the reply. There is something I don't understand in the example:
B_viacd = mapper(B, j, non_primary=True, properties={
"b_id": [j.c.b_id, j.c.d_b_id],
"d_id": j.c.d_id
})
How Is the mapper supposed to map the results of j with the class B ? the
statement behind j is:
the section at
https://docs.sqlalchemy.org/en/latest/orm/join_conditions.html#relationship-to-non-primary-mapper
has a recipe for: "when we seek to join from A to B, making use of any
number of C, D, etc. in between, however there are also join
conditions between A and B directly", I think that's
from sqlalchemy import Column, DateTime, String, Integer, ForeignKey, func,
Table, create_engine
from sqlalchemy.orm import relationship, backref, sessionmaker, joinedload,
contains_eager
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
engine =
