[Zope] VHM, ZClass double entry - desperate

[robert]

Milos,
I had a similar problem after cooping a folder with a catalog in it.
After I went to the catalog->advanced tab and updated the catalog the 
double entry went away.
hope this helps
robert

Milos Prudek wrote:

> I'm desperate.
>
> ZClass instances generate doubled entries in ZCatalog under VHM.
>
> ZClass inherits ZObject, CatalogPathAwareBase, ZObjectManager.
>
> The first set of entries is created through Find Objects ZMI tab. 
> These entries display absolute path in Object Identifier column, but 
> they return correct, i.e. relative to VHM root, path through 
> ZCatalog.getPath(). That's ok.
>
> The second entry gets created because of the following line in 
> index_html DTM Method of ZClass:
>
> <dtml-call 
> "propertysheets.data.manage_changeProperties(readers=readers+1)">
>
> This double entry displays relative path in Object Identifier column 
> and in ZCatalog.getPath(). Not a problem per se, but every instance is 
> recorded twice in ZCatalog, and that's the bummer.
>
> If I remove the line above from index_html of the ZClass, double entry 
> is not created. If I put it back, double entry is created.
>
> It would seem that the problem is isolated. Therefore I tried to 
> replicate the error with a fresh ZClass:
>
> - create product p
> - create zclass z, with CatalogPathAware
> - create folders a,b,c anywhere
> - add propertysheet ps
> - add property display(int) to ps
> - add method index_html which call nethod inc_display
> - add method inc_display
> - add ZCatalog Cat
> - find objects of type: 'z'
> - run index_html and see if double entry is created.
>
> Result: double entry is not created. I'm unable to reproduce the 
> problem on a fresh ZClass. The original ZClass is so complex that it 
> would take many hours to decompose it.
>
> What could it be??
>