added room id to connections table

app/models/connection.rb

@@ -2,13 +2,21 @@ class Connection < ApplicationRecord
   belongs_to :user
   belongs_to :contact, class_name: 'User', foreign_key: 'contact_id'
 
+  after_create :set_room_id
   after_create :create_inverted_connection
 
   private
 
+  def set_room_id
+    self.room_id = "#{self.user.email}+#{self.contact.email}"
+    self.save!
+  end
+
   def create_inverted_connection
     unless Connection.where('user_id = ? and contact_id = ?', self.contact.id, self.user.id).length > 0
-      Connection.create!(user: self.contact, contact: self.user)
+      inverted = Connection.create!(user: self.contact, contact: self.user)
+      inverted.room_id = "#{self.user.email}+#{self.contact.email}"
+      inverted.save!
     end
   end
 end