Thxs => useful links bookmarked :-) Anyway, how do you found default alias of table name then? By example the alias "act" in my hql string here "act.eventId" (I found it by chance in error log) #set($results= $xwiki.activitystream.searchEvents("act.eventId in ($ListIn)", false, 0, 0)) Here i suppose? https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi… -------------------------------------------- En date de : Mer 20.1.16, Eduard Moraru <enygma2002(a)gmail.com> a écrit : Objet: Re: [xwiki-users] Fw : Fw : Re: Fw : Re: Fw : Re: How can I get event object through a form À: "Pascal BASTIEN" <pbasnews-xwiki(a)yahoo.fr>fr>, "XWiki Users" <users(a)xwiki.org> Date: Mercredi 20 janvier 2016, 16h36 Hi, This is the activitystream hibernate mapping where you can see the exact property names: https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi… ...and this is the regular XWiki model mapping (corresponding to the other tables observed in http://platform.xwiki.org/xwiki/bin/view/DevGuide/DatabaseSchema ) https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi… Remember that, when writing HQL, you need to look at the hibernate mapping, not just the SQL database schema (which is useful, but can be misleading). Thanks, Eduard