CONTINUING ! sorry
On Fri, Oct 20, 2017 at 11:55 AM, Sven Dumay <sven.du...@gmail.com> wrote:
>
> *I tried other things and I found the following solution :*
>
> from sqlalchemy.ext.declarative import declarative_base, DeclarativeMeta
> from sqlalchemy import Column, Integer
>
> class MetaBase(DeclarativeMeta):
>
> def __init__(cls, nom, bases, contenu):
> super(MetaBase, cls).__init__(nom, bases, contenu)
> print("Init MetaBase")
>
> Base = declarative_base(metaclass = MetaBase)
>
> class Stockable(Base):
>
> __abstract__ = True
>
> def __init__(self):
> print("Init Stockable")
>
> class Character(Stockable):
>
> __tablename__ = 'characters'
> id = Column(Integer, primary_key=True)
>
> def __init__(self, name):
> self.name = name
> print("Init character")
>
>
> jean = Character("Jean")
> print(jean.name)
>
>
>
this seems like roughly the correct approach.
> It seems to work. I get the following result :
>
> >>>
> Init MetaBase
> Init MetaBase
> Init MetaBase
> Init compte
> Jean
> >>>
>
> However, the problem with this method is that I have to add *"__abstract__
> = True" *to every class which is inherited by Stockable... so, about 400
> classes.
>
I don't see why that is. If these classes are mapped to tables (which, if
they are persisted, they are), then there is no reason to add
"__abstract__". As in my previous email, how these 400 classes link
to tables is what needs to be answered and then we can formulate the
correct calling style.
> It is not very clean. Is it possible to avoid that by using something
> similar to my first code ? It would be great !
>
> Thank you very much.
>
> Sven
>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
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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 description.
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