How to Create a read-only group in SalesForce

Question

Hello, I want to know how to create a read-only group + like + comment and not being able to post for members except admin and owner * how to use triggers on the posting in this group?. Thank you.

khaled baiche · Accepted Answer

Solution:   http://boards.developerforce.com/t5/Chatter-and-Chatter-API/read-only-Group-using-trigger/m-p/631067/thread-id/2912/highlight/false#.M2915

khaled baiche · Answer

i tried but it not work:   trigger N_GroupReadOnly on FeedItem (before insert) { ID groupId = [Select Id from CollaborationGroup                where Name = 'Group_ReadOnly'].Id; CollaborationGroup ownerId = [Select OwnerId From CollaborationGroup                                Where Name = 'Group_ReadOnly']; for(FeedItem item : trigger.new){     if((item.ParentId == groupId) &&         (item.InsertedById != ownerId.OwnerId))     {         system.debug('you can not add post in this group');         alert("you can not add post in this group");         delete item ;         return;     }     else{         insert item;     } }

How to Create a read-only group in SalesForce

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