This is a question best suited to the Glorp mailing list (which I'm
cc'ing in this email).
What you need is an HorizontalTypeResolver, and define a common class
as the ancestor for both of your classes.
You'll have to define a descriptor for it, and you will use it to
reference the "parent" of these (e.g. AbstractQuestion).
So in your Glorp Descriptor you'll end up with something like:
QuestionDescriptorSystem>>#typeResolverForAbstractQuestion
^(HorizontalTypeResolver forRootClass: AbstractQuestion)
QuestionDescriptorSystem>>#descriptorForAbstractQuestion: aDescriptor
"..."
(self typeResolverFor: AbstractQuestion) register: aDescriptor
abstract: true.
QuestionDescriptorSystem>>#descriptorForQuestion: aDescriptor
"..."
(self typeResolverFor: AbstractQuestion) register: aDescriptor.
QuestionDescriptorSystem>>#descriptorForQuestionGroup: aDescriptor
"..."
(self typeResolverFor: AbstractQuestion) register: aDescriptor.
Then
classModelForSection: aClassModel
aClassModel newAttributeNamed: #questions collectionOf: AbstractQuestion
I don't know about your model, but if both classes work
polymorphically and have a common semantic root (it is "Question"), it
is hard for me to see why they don't have a common ancestor.
Disclaimer: the above code was written without testing it, based on my
memory only :)
Regards,
Esteban A. Maringolo
2018-03-29 11:43 GMT-03:00 Alejandro Infante <
[hidden email]>:
> Hi guys!
>
> I’m trying to use GLORP and I’m having problems defining the class model for a class which has an instance variable which is a collection of instances of two different classes:
>
> I have 3 classes named: { Section . Question . QuestionGroup } and I have problems for specifying the glorp class model for Section.
> Object subclass: #Section
> instanceVariableNames: ‘questions ...'
> classVariableNames: ''
>
> The thing is that #questions instance variable is a collection of Question AND QuestionGroup. They have polymorphic behavior, but they have not a common superclass (besides Object).
>
> How does my class model should look like?
>
> classModelForSection: aClassModel
> ...
> aClassModel newAttributeNamed: #questions collectionOf: ****?.
>
>
> Thanks for the help!
> Cheers,
> Alejandro
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