Let Room name be unique within each event

app/models/room.rb

@@ -2,7 +2,7 @@ class Room < ApplicationRecord
   belongs_to :event
   has_many :time_slots
 
-  validates :name, uniqueness: true, presence: true
+  validates :name, uniqueness: {scope: :event_id}, presence: true
   scope :by_grid_position, -> {where.not(grid_position: nil).order(:grid_position)}
   scope :grid_order, -> { order(:grid_position) }
 end

spec/models/room_spec.rb

@@ -2,11 +2,15 @@
 
 describe Room do
   describe "validations" do
-    it "requires that names are unique" do
-      room = create(:room, name: 'name')
-      room2 = build(:room, name: room.name)
-
+    it "requires that names are unique within an event" do
+      event1 = create(:event)
+      room = create(:room, event: event1, name: 'name')
+      room2 = build(:room, event: event1, name: room.name)
       expect(room2).to be_invalid
+
+      event2 = create(:event)
+      room3 = build(:room, event: event2, name: room.name)
+      expect(room3).to be_valid
     end
   end
 end