Re: Problem in propagateDeleteForObject: 'Array is empty' ?

Check your delete rules

the to-many relationship (flattened) needs to be nullify but the to- 
one to the intermediate table needs to be cascade, then the inverse  
to-one needs to be nullify.



On 10-Jan-07, at 7:10 AM, Jürgen Lorenz Simon wrote:

> Hello,
>
> I have a complex model, modelling a tree structure with persistence  
> in the
> database. In the tree, it can be the case that a node has more than  
> one parent.
> Assume the following configuration:
>
> N1.children = N2,N3,N4
> N2.children = N4,N5,N6
>
> => N4.parents = N1,N2
>
> When adding one child to more than one parents, then deleting one  
> of the
> parent nodes, I get problems. Which means, when deleting N1 or N2,  
> I get
> the following exception:
>
> 1) testValueNodeHierarchies 
> (com.tecc.avida.model.test.ValueNodeTests) 
> java.lang.IllegalArgumentException: Array is empty
> 	at com.webobjects.foundation.NSArray.objectAtIndex(NSArray.java:510)
> 	at com.webobjects.eocontrol._EOCheapCopyMutableArray.objectAtIndex 
> (_EOCheapCopyMutableArray.java:98)
> 	at  
> com.webobjects.eocontrol.EOClassDescription.propagateDeleteForObject 
> (EOClassDescription.java:516)
> 	at  
> com.webobjects.eocontrol.EOCustomObject.propagateDeleteWithEditingCont 
> ext(EOCustomObject.java:688)
> 	at  
> com.webobjects.eocontrol.EOClassDescription.propagateDeleteForObject 
> (EOClassDescription.java:523)
> 	at  
> com.webobjects.eocontrol.EOCustomObject.propagateDeleteWithEditingCont 
> ext(EOCustomObject.java:688)
> 	at  
> com.webobjects.eocontrol.EOEditingContext.propagateDeletesUsingTable 
> (EOEditingContext.java:2231)
> 	at com.webobjects.eocontrol.EOEditingContext._processDeletedObjects 
> (EOEditingContext.java:2193)
> 	at com.webobjects.eocontrol.EOEditingContext._processRecentChanges 
> (EOEditingContext.java:1744)
> 	at com.webobjects.eocontrol.EOEditingContext._prepareForPushChanges 
> (EOEditingContext.java:3257)
> 	at com.webobjects.eocontrol.EOEditingContext.saveChanges 
> (EOEditingContext.java:3213)
> 	...
>
> The children/parent relationships between nodes are in fact flattened
> relationships, which run via a many-to-many table. Did someone happen
> to run into this problem before?
>
> Best,
> J.L.Simon
> _______________________________________________
> WebObjects-dev mailing list
> [email protected]
> http://www.omnigroup.com/mailman/listinfo/webobjects-dev