Well, I changed the Assignee property from UserList to DBList. It's not so easy to find documentation on this subject. This page helped me a little http://dev.xwiki.org/xwiki/bin/view/Drafts/DatabaseListProperties 2011/12/1 Maxime Sinclair <[email protected]>:
Hi,
I try to use the Todo Application (http://extensions.xwiki.org/xwiki/bin/view/Extension/Todo+Application) in a farm context with all the users defined in the master wiki.
The only problem is the Assignee property defined as a "List of Users". In a subwiki of the farm, the only defined users are XWiki.Admin and XWikiGuest. It would be fine if the list of users can be filled from the XWiki.AllGroup of the subwiki. But I don't know how to do this. Could you put me on the right direction ? May be you have a better idea...
I hope my question is clear.
Maxime