yash-ifc

irb(main):003:0>  Chats::Message.where(role: 'system').where.not(activity_type: nil).count       
=> 36139
irb(main):004:0>   Chats::Message.where(role: 'system')                                                                                                                          
                                                                                             
irb(main):005:0>     .where.not(activity_type: nil)
irb(main):006:0>     .group(:activity_type)
irb(main):007:0>     .order('count_all DESC')
irb(main):008:0>     .count
=> 
{"search"=>17956,