[hibernate-dev] [OGM] Inheritance mapping in Neo4j

[Guillaume Smet]

Hi,

As I understand it, having 2 labels means that you could search either with
n:Person or n:Player?

Thus if we keep the DTYPE: Player in place in addition to both labels, we
won't break anything, will we?

-- 
Guillaume

On Thu, Nov 17, 2016 at 2:30 PM, Sanne Grinovero <sanne at hibernate.org>
wrote:

> Hi, it makes sense but I don't think we can change the mapping now.
>
> Could you do it as a new option? Would you be able to adjust the
> queries as needed?
>
> If you can make it a configuration property, default to the old style
> mapping, and log a warning of using a deprecated mapping when the old
> one is being used. This implies that people not choosing any mapping
> style explicitly will see a warning (as the old one would still be the
> default).
>
> Thanks,
> Sanne
>
> On 16 November 2016 at 12:42, Davide D'Alto <davide at hibernate.org> wrote:
> > A user created the issue https://hibernate.atlassian.net/browse/OGM-1210
> >
> > The problem is that when we use the SingleTable strategy in Neo4j  we
> > add a property DTYPE to the node to discriminate the entities instead
> > of using labels.
> >
> > As an example, given an entity Player that extends Person we create:
> >
> > (n:Person {DTYPE: Player})
> >
> > instead of having a node with two labels:
> >
> > (n:Person:Player)
> >
> > I think the mapping with multiple labels is more natural than the one
> > we currently have.
> >
> > I was wondering if we should fix this for the next release, the
> > problem is that I would need additional information in one of our
> > .spi.*Context and it will change the mapping.
> >
> > The next release should be 5.1.Beta2
> >
> > What do you think?
> >
> > Thanks,
> > Davide
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