tonthon <[email protected]> wrote:
> Sorry I was a bit too speed when writing that one :)
>
> So I've got a Base model :
> """
> class Base(DBBASE):
> __tablename__ =
> 'base'
> __mapper_args__ = {'polymorphic_identity': 'base', 'polymorphic_on':
> 'type_'}
> id = Column(Integer, primary_key=True)
> name = Column(String(255))
> description = deferred(
> Column(Text()),
> group="full"
> )
> type_ = Column( String(30), nullable=False)
> """
>
> and a child model
> """
> class Element(DBBASE):
> __tablename__ = 'element'
> __mapper_args__ = {'polymorphic_identity': 'element'}
> id = Column(ForeignKey("base.id"))
> comments = deferred( Column(Text()), group="full", )
> """
>
> The following query :
> """
> Element.query().options(undefer_group('full')).all()
> """
>
> doesn't load the description column, is that the expected behaviour ?
When you say “a child model Element”, that’s not what I see. Element and
Base are both descending from DBBASE. If Element were a child of Base, it
would need to be declared as “class Element(Base)”.
As it is, it is expected because the “Element” class does not have a column
called “description”. If you were to load objects of type “Base”, then you’d
see “description”.
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