Add `by_version` method to `SoftwareUpdate` model

app/controllers/admin/software_updates_controller.rb

@@ -6,7 +6,7 @@ module Admin
 
     def index
       authorize :software_update, :index?
-      @software_updates = SoftwareUpdate.all.sort_by(&:gem_version)
+      @software_updates = SoftwareUpdate.by_version
     end
 
     private

app/mailers/admin_mailer.rb

@@ -48,7 +48,7 @@ class AdminMailer < ApplicationMailer
   end
 
   def new_software_updates
-    @software_updates = SoftwareUpdate.all.to_a.sort_by(&:gem_version)
+    @software_updates = SoftwareUpdate.by_version
 
     locale_for_account(@me) do
       mail subject: default_i18n_subject(instance: @instance)
@@ -56,7 +56,7 @@ class AdminMailer < ApplicationMailer
   end
 
   def new_critical_software_updates
-    @software_updates = SoftwareUpdate.urgent.to_a.sort_by(&:gem_version)
+    @software_updates = SoftwareUpdate.urgent.by_version
 
     locale_for_account(@me) do
       mail subject: default_i18n_subject(instance: @instance)

app/models/software_update.rb

@@ -37,6 +37,10 @@ class SoftwareUpdate < ApplicationRecord
       Rails.configuration.x.mastodon.software_update_url.present?
     end
 
+    def by_version
+      all.sort_by(&:gem_version)
+    end
+
     def pending_to_a
       return [] unless check_enabled?
 

spec/models/software_update_spec.rb

@@ -16,6 +16,16 @@ RSpec.describe SoftwareUpdate do
     end
   end
 
+  describe '.by_version' do
+    let!(:latest_update) { Fabricate :software_update, version: '4.0.0' }
+    let!(:older_update) { Fabricate :software_update, version: '3.0.0' }
+
+    it 'returns record in gem version order' do
+      expect(described_class.by_version)
+        .to eq([older_update, latest_update])
+    end
+  end
+
   describe '#pending?' do
     subject { described_class.new(version: update_version) }