created models for chatroom

app/models/chat_room.rb

@@ -0,0 +1,5 @@
+class ChatRoom < ApplicationRecord
+  has_many :users, through: :chat_room_participations
+  has_many :chat_room_participations
+  has_many :requests
+end

app/models/chat_room_participation.rb

@@ -0,0 +1,4 @@
+class ChatRoomParticipation < ApplicationRecord
+  belongs_to :user
+  belongs_to :chat_room
+end

app/models/request.rb

@@ -0,0 +1,4 @@
+class Request < ApplicationRecord
+  belongs_to :user
+  belongs_to :chat_room
+end

app/models/user.rb

@@ -5,6 +5,9 @@ class User < ApplicationRecord
          :recoverable, :rememberable, :validatable
 
   has_many :connections
+  has_many :chat_rooms, through: :chat_room_participations
+  has_many :chat_room_participations
+  has_many :requests
 
   def contacts
     self.connections.map do |connection|