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Home » Eclipse Projects » Sirius » Trying to define Relation Based Edges(Using AQL to define multiple target classes in the target finder expression)
Trying to define Relation Based Edges [message #1832652] Tue, 22 September 2020 18:50 Go to next message
Thomas Chiang is currently offline Thomas ChiangFriend
Messages: 104
Registered: March 2020
Senior Member
Hello all,

I am trying to define a relation based edge for my project for class A. The target of the relation can be class B or class C. How can I define in the target finder expression an 'or' expression so that I don't have to change my ecore metamodel in order to implement this reference? I am trying to learn AQL in order to do it but it is not very clear how I can do this. Any help would be greatly appreciated!

[Updated on: Wed, 23 September 2020 20:14]

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Re: Trying to define Relation Based Edges [message #1832755 is a reply to message #1832652] Thu, 24 September 2020 12:50 Go to previous messageGo to next message
Julien Dupont is currently offline Julien DupontFriend
Messages: 172
Registered: July 2009
Senior Member
Hello Thomas,

You have 2 options to do this. The first is to modify you ecore metamodel and define a super Class for B and C.
If you don't want modify your metamodel you can create a query that allow to find the target from the source. A request as for example aql:self.myrelationB or self.myRelationC where self correspond to the source and myRelationD correspond to relation return B.

Regards,

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Re: Trying to define Relation Based Edges [message #1832941 is a reply to message #1832755] Tue, 29 September 2020 16:46 Go to previous message
Thomas Chiang is currently offline Thomas ChiangFriend
Messages: 104
Registered: March 2020
Senior Member
Thanks! I ended up just changing the metamodel to make things easier as I couldn't get a query to work the way I wanted it to.

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