On Tue, Apr 10, 2018 at 9:28 AM, Julien Cigar <julien.ci...@gmail.com> wrote:
> Hello,
>
> I wondered if it is possible to use a class mapped against multiple
> tables as a relationship() in another class?

it is, there's examples at
http://docs.sqlalchemy.org/en/latest/orm/join_conditions.html#relationship-to-non-primary-mapper

that is map your related class to whatever you want in a non primary
mapper.   If you are just selecting data you have a lot of options.


>
> something like:
>
> ### Content
>
> content_translation_join = sql.join(
>   t_content, t_content_translation
> )
>
> orm.mapper(
>   ContentTranslation, content_translation_join,
>   polymorphic_on=t_content.c.content_type_id
> )
>
> orm.mapper(
>   Content, t_content,
>   polymorphic_on=t_content.c.content_type_id,
>   properties={
>     'translations': orm.relationship(
>       ContentTranslation,
>       # more stuff here
>     )
>   }
> )
>
> ### Document
>
> orm.mapper(
>   DocumentTranslation, t_document_translation,
>   inherits=ContentTranslation,
>   polymorphic_identity=some_id
> )
>
> orm.mapper(
>   Document, t_document,
>   inherits=Content,
>   polymorphic_identity=some_id
> )
>
> I tried (1) but it doesn't seems to work so I want to be sure that it's
> not possible :)
>
> Thanks!
> Julien
>
> (1) 
> https://gist.github.com/silenius/561b13f4b987c36434cd81e2c08cab6e#file-foo-py
>
>
>
> --
> Julien Cigar
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> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and 
> Verifiable Example.  See  http://stackoverflow.com/help/mcve for a full 
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-- 
SQLAlchemy - 
The Python SQL Toolkit and Object Relational Mapper

http://www.sqlalchemy.org/

To post example code, please provide an MCVE: Minimal, Complete, and Verifiable 
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