How to retrieve non-persistent entities list with self-association

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When I try to retrieve a list of non-persistent entities with self-association from a source "association" in a microflow, the list obtained is empty, even though the entity has data. Do you know what the cause of this is? Do non-persistent entities become empty when I do the Retrieve list again after filling it with data?   Best regards  
asked
3 answers
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You must use a java action. There's absolutely no way to retrieve by reference with the reverse flag without a java action. Given your entity/association is named: SomeHelper/SomeHelper_SomeHelper you should write a java action taking the destination object of the reference as a parameter (the so called "child" ) and returning a list of source objects referencing the parameter (the so called "parents", also "association owners").

        // BEGIN USER CODE
        final boolean reverse = true;
        return Core
            .retrieveByPath(
                getContext(),
                child.getMendixObject(),
                SomeHelper.MemberNames.SomeHelper_SomeHelper.toString(),
                reverse);
        // END USER CODE

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answered
0

Hi Yuki,

 

How are you setting that association in first place? Can you elaborate?

answered
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I am getting the same problem to retrieve the list of non-persistent entities in self-association, which has a one to many relationship. I think this is the mendix bug. It works with retrieving a list in such relationship if it were not in self-association!

By the way, the mendix definition of parent and child is confusing or obscure: one child has multiple parents??? This bug might has been caused by the wrong naming of parent and child relationship.

Writing java action is just a work around.

answered