Random color assigned to new post statuses

app/models/post_status.rb

@@ -1,5 +1,5 @@
 class PostStatus < ApplicationRecord
-  after_initialize :set_order_to_last
+  after_initialize :set_random_color, :set_order_to_last
 
   validates :name, presence: true, uniqueness: true
   validates :color, format: { with: /\A#(?:[0-9a-fA-F]{3}){1,2}\z/ }
@@ -12,6 +12,13 @@ class PostStatus < ApplicationRecord
     end
   end
 
+  def set_random_color
+    return unless new_record?
+    return unless color.nil?
+
+    self.color = '#' + Random.bytes(3).unpack1('H*')
+  end
+
   def set_order_to_last
     return unless new_record?
     return unless order.nil?

spec/models/post_status_spec.rb

@@ -62,6 +62,12 @@ RSpec.describe PostStatus, type: :model do
     expect(roadmap.second).to eq(post_status2)
   end
 
+  it 'automatically sets a random color if not specified' do
+    post_status1 = PostStatus.new
+
+    expect(post_status1.color).to match(/\A#(?:[0-9a-fA-F]{3}){1,2}\z/)
+  end
+
   it 'automatically sets order to last order if not specified' do
     order = 10
     post_status1 = FactoryBot.create(:post_status, order: order)