Hierarchial Extension and Find Form

[Former Member]

Hi,

I want to display my custom BO in an OWL, using a Hierarchial Extension and a Find Form.

The source of my custom BO looks as follows (only the elementary fields are specified here):

businessobject ITCOBSGroup

{

  [AlternativeKey]

  element ITCOBSGroupID : ID;

  element ITCOBSGroupParentID : ID;

  element HasChildIndicator : Indicator;

  association ToChildEntry [0,n]  to ITCOBSGroup valuation (ITCOBSGroupParentID == ITCOBSGroupID);

  element ITCOBSGroupName : LANGUAGEINDEPENDENT_EXTENDED_Name;

}

In order to use a find form I created a custom query. In the next step I bound the query fields to my data model. And here is my problem:

Unlike the standard query my custom query yields not an association "ToChildEntry" that I could bind to the corresponding element ("ChildrenAssociation")of the Hierarchial Extension.

So I wonder how it is possible to use the Find Form and a Hierarchial Extension in the context of on OWL.

Thanks for your help and your answer in advance.

Markus

[HorstSchaude]

Hello Markus,

What is the goal of adding the association to the Find form?

You have all fields of a single node in the hierarchy in the Root node of your BO.

You can add the reverse association "ToParentEntry" with the revers valuation expression.

This association is - of course - zero to one and should be able to be bound.

HTH,

    Horst

[Former Member]

Hello Horst,

when the Hierarchial Extension is added, following structure is generated:

In my example as described above, I bound the ChildField to the HasChildIndicator and the ChildrenAssociation to the ToChildEntry association:

In order to use a find form, I have to create a custom query, in my example named "ITCOBSGroupQueryOWL":

In order to use the find functionality, the fields of the custom query have to be bound to the Data Model.

At this point, I am not sure what to bind to the Hierarchial Extension, even if I use a "ToParentEntry" as you proposed.

I think, the Hierarchial Extension needs a kind of association to be bound to the ChildrenAssociation oder to the ParentAssociation. Both are missing if I use a custom query.

A binding to the "ToParent" association as you proposed is not working and throws a dump.

Thanks for your help in advance -

Markus

[HorstSchaude]

Hello Markus,

The query will not be able to bind parameter of a 0-to-n association. This is simply not possible.

Second, I don't mean to use the "ToParent" assoziation.

You need to define a own association similar to "ToChildEntry" in your BO, but targeting the parent of the current child (simply rever the sequence in the validation clause).

This association is 0-to-1 and it shall be possible to use it in the query.

HTH,

   Horst