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

db/migrate/20180829102007_add_column_to_connections.rb

@@ -0,0 +1,5 @@
+class AddColumnToConnections < ActiveRecord::Migration[5.2]
+  def change
+    add_column :connections, :room_id, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2018_08_27_151325) do
+ActiveRecord::Schema.define(version: 2018_08_29_102007) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -18,6 +18,7 @@ ActiveRecord::Schema.define(version: 2018_08_27_151325) do
   create_table "connections", force: :cascade do |t|
     t.bigint "user_id"
     t.bigint "contact_id"
+    t.string "room_id"
     t.index ["contact_id"], name: "index_connections_on_contact_id"
     t.index ["user_id"], name: "index_connections_on_user_id"
   end