Create ApplicationSettings if does not exist in runtime

app/controllers/admin/application_settings_controller.rb

@@ -16,7 +16,7 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
   private
 
   def set_application_setting
-    @application_setting = ApplicationSetting.last
+    @application_setting = ApplicationSetting.current
   end
 
   def application_setting_params

app/models/application_setting.rb

@@ -2,4 +2,14 @@ class ApplicationSetting < ActiveRecord::Base
   def self.current
     ApplicationSetting.last
   end
+
+  def self.create_from_defaults
+    create(
+      default_projects_limit: Settings.gitlab['default_projects_limit'],
+      signup_enabled: Settings.gitlab['signup_enabled'],
+      signin_enabled: Settings.gitlab['signin_enabled'],
+      gravatar_enabled: Settings.gravatar['enabled'],
+      sign_in_text: Settings.extra['sign_in_text'],
+    )
+  end
 end

config/initializers/8_application_settings.rb

-if ActiveRecord::Base.connection.table_exists?('application_settings')
-  unless ApplicationSetting.any?
-    ApplicationSetting.create(
-      default_projects_limit: Settings.gitlab['default_projects_limit'],
-      signup_enabled: Settings.gitlab['signup_enabled'],
-      signin_enabled: Settings.gitlab['signin_enabled'],
-      gravatar_enabled: Settings.gravatar['enabled'],
-      sign_in_text: Settings.extra['sign_in_text'],
-    )
-  end
-end

lib/gitlab/current_settings.rb

@@ -2,8 +2,14 @@ module Gitlab
   module CurrentSettings
     def current_application_settings
       if ActiveRecord::Base.connection.table_exists?('application_settings')
-        ApplicationSetting.current
+        ApplicationSetting.current ||
+          ApplicationSetting.create_from_defaults
       else
+        fake_application_settings
+      end
+    end
+
+    def fake_application_settings
       OpenStruct.new(
         default_projects_limit: Settings.gitlab['default_projects_limit'],
         signup_enabled: Settings.gitlab['signup_enabled'],
@@ -13,5 +19,4 @@ module Gitlab
       )
     end
   end
-  end
 end