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From Andrus Adamchik <and...@objectstyle.org>
Subject Re: Trouble with modeling vertical inheritance
Date Mon, 28 Mar 2016 12:40:46 GMT
Simon, you are not subscribed to the list I guess. So you are missing the replies to your original
message. Please check the archives. There were some: http://www.mail-archive.com/user@cayenne.apache.org/msg09239.html

Andrus

> On Mar 28, 2016, at 3:12 PM, Simon Farner <s.farner@bluewin.ch> wrote:
> 
> Hello everybody
> 
> I am trying to get the book/ebook/paper_book example to work with
> Cayenne Modler 4.0.M3, but it wont validate. This is the third time I
> try this and I really need to get this working now, I am not very keen
> on a road block meeting and switching to another ORM.
> 
> I strugle with the relationships between superclass table and subclass
> table. I set up two relation ships in BOOK
> 
> 	Name:"paperBook",Target:"PAPER_BOOK", To Dep PK:True, To
> Many:False
> 	Name:"eBook",Target:"E_BOOK", To Dep PK:True, To Many:False
> 
> I then first create the ObjEntities for all three. Then I enter the
> type classifier field and set the inheritance. Afterwards I go to the
> two subclasses and map the two individual attributes they posses to the
> right subclass attribut. Then I save the project and the validation
> tells me that that all the ObjRelationships have uncompelte mappings.
> 
> Example: "ObjRelationship book.eBook has incomplete DbRelationship
> mapping"
> 
> I then go to Book ObjEntity and open both relationships to the subclass
> once, but I change nothing. Opon closing I am asked if I want to save
> my changes, because I some how have magically modified the path. I say
> yes. Then I validat again  and all but two complaints are gone. Left
> over are:
> 
> 	"ObjRelationship EBook.book has incomplete DbRelationship
> mapping"
> 	"ObjRelationship PaperBook.book has incomplete DbRelationship
> mapping"
> 
> Those are the relation ships pointing back from the subclasses to the
> super clases. I can't fix them. When I open the edit dialog and book is
> allready pre selected as target.##SELECTION_END##
> 
> Can please someone help me to find out what I am doing wrong? I kind of
> feel stupid about asking here, because it is so trivial :/ But I really
> need this working. If someone wants to have a look at my example
> cayenne project I put it on my drop box: https://www.dropbox.com/s/uw82
> cl1yxkl3ohk/cayenne-project.xml?dl=0
> 
> Best regards and thanks to everybody for helping
> Simon


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