Linking meetings to accounts and/or opportunities

Question

If I create a meeting via the subpanel of an opportunity, that meeting is not shown in the subpanel Meetings of the account which is linked to that same opportunity , why is that ?

Hugo Geyskens · Answer

In that scenario the Meeting belongs to Opportunity's relationship, not to the Account's one. 
 
 A Meeting can only be related to a single record at once, that means, or it is related to an Opportunity or to an Account. 
 In order to make that Meeting to be displayed in subpanel under both Opportunity and Account you need to duplicate it, which may not be a good approach. 
 Another approach is to create a relationship One to Many between Accounts and Meetings. Then you will need to create LogicHook after_save on Meetings in order to relate new Meetings to the Account thru that new relationship if the Meeting is related to either Account or Opportunity thru default relationship (parent_type, parent_id). Finally you will need to override the default meetings subpanel by the custom one. 
 Anyway, it sound quite hard to accomplish for some very specific request.