Inheritance in PyEcore about pyecore HOT 3 CLOSED

Hi @ewoudwerkman

The inheritance in PyEcore should be straight forward. In your case, from what I understand from your code, you are actually extending the Ecore metamodel and not your metamodel. I'm the one to blame for this, I use the same name: eClass to deal with two concepts and it can be confusing. This attribute is used to go from the static eclass world to the dynamic counterpart, but if you are in the dynamic eclass world, it is used to find its actual metaclass.

In your case, I undestand that you are dealing with Dynamic EClass, and that esdl.Building is a dynamic EClass. In that case, this line does not extend the Building EClass, but extends the metaclass of the Building EClass (you are actually subclassing EClass).

CommercialBuildingMetaClass = EClass('CommercialBuilding', superclass=(esdl.Building.eClass))

In your case, as you are dealing with dynamic EClass, your call should be changed like that:

CommercialBuilding = EClass('CommercialBuilding', superclass=(esdl.Building))
c = CommercialBuilding(name='A CommercialBuilding')

I know that it the bridge between the dynamic and static part can be confusing because of the design I used. I will try to smooth everything in future versions. You can find deeper information about that and how the two worlds are related in this picture:

And more in depth details on this blog post: https://modeling-languages.com/pyecore-python-eclipse-modeling-framework/

I will try to smooth things up and update the documentation accordingly for next versions.

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Ah, thanks! That clarifies things. Now it works as expected!

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@ewoudwerkman I'm glad it works for you :) !

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