Merge pull request #6518 from kennyj/fix_5847-4

(Try again) Fix #5847 and #4045.

activerecord/lib/active_record.rb

@@ -80,6 +80,7 @@ module ActiveRecord
     autoload :Sanitization
     autoload :Schema
     autoload :SchemaDumper
+    autoload :SchemaMigration
     autoload :Scoping
     autoload :Serialization
     autoload :SessionStore

activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb

@@ -1,5 +1,4 @@
 require 'active_support/deprecation/reporting'
-require 'active_record/schema_migration'
 require 'active_record/migration/join_table'
 
 module ActiveRecord

activerecord/lib/active_record/migration.rb

@@ -1,7 +1,6 @@
 require "active_support/core_ext/module/delegation"
 require "active_support/core_ext/class/attribute_accessors"
 require 'active_support/deprecation'
-require 'active_record/schema_migration'
 require 'set'
 
 module ActiveRecord

activerecord/lib/active_record/railtie.rb

@@ -30,6 +30,7 @@ class Railtie < Rails::Railtie
     )
 
     rake_tasks do
+      require "active_record/base"
       load "active_record/railties/databases.rake"
     end
 
@@ -38,10 +39,15 @@ class Railtie < Rails::Railtie
     # first time. Also, make it output to STDERR.
     console do |app|
       require "active_record/railties/console_sandbox" if app.sandbox?
+      require "active_record/base"
       console = ActiveSupport::Logger.new(STDERR)
       Rails.logger.extend ActiveSupport::Logger.broadcast console
     end
 
+    runner do |app|
+      require "active_record/base"
+    end
+
     initializer "active_record.initialize_timezone" do
       ActiveSupport.on_load(:active_record) do
         self.time_zone_aware_attributes = true

railties/lib/rails/application.rb

@@ -158,6 +158,14 @@ def load_console(app=self)
       self
     end
 
+    # Load the application runner and invoke the registered hooks.
+    # Check <tt>Rails::Railtie.runner</tt> for more info.
+    def load_runner(app=self)
+      initialize_runner
+      super
+      self
+    end
+
     # Stores some of the Rails initial environment parameters which
     # will be used by middlewares and engines to configure themselves.
     def env_config
@@ -304,6 +312,9 @@ def initialize_console #:nodoc:
       require "rails/console/helpers"
     end
 
+    def initialize_runner #:nodoc:
+    end
+
     def build_original_fullpath(env)
       path_info    = env["PATH_INFO"]
       query_string = env["QUERY_STRING"]

railties/lib/rails/commands/runner.rb

@@ -41,6 +41,7 @@
 
 require APP_PATH
 Rails.application.require_environment!
+ Rails.application.load_runner
 
 if code_or_file.nil?
   $stderr.puts "Run '#{$0} -h' for help."

railties/lib/rails/engine.rb

@@ -437,6 +437,11 @@ def load_console(app=self)
       super
     end
 
+    def load_runner(app=self)
+      railties.all { |r| r.load_runner(app) }
+      super
+    end
+
     def eager_load!
       railties.all(&:eager_load!)
 

railties/lib/rails/railtie.rb

@@ -145,6 +145,12 @@ def console(&blk)
         @load_console
       end
 
+      def runner(&blk)
+        @load_runner ||= []
+        @load_runner << blk if blk
+        @load_runner
+      end
+
       def generators(&blk)
         @generators ||= []
         @generators << blk if blk
@@ -179,6 +185,10 @@ def load_console(app=self)
       self.class.console.each { |block| block.call(app) }
     end
 
+    def load_runner(app=self)
+      self.class.runner.each { |block| block.call(app) }
+    end
+
     def load_tasks(app=self)
       extend Rake::DSL if defined? Rake::DSL
       self.class.rake_tasks.each { |block| self.instance_exec(app, &block) }

railties/test/application/rake_test.rb

@@ -167,5 +167,28 @@ def test_rake_clear_schema_cache
       end
       assert !File.exists?(File.join(app_path, 'db', 'schema_cache.dump'))
     end
+
+    def test_load_activerecord_base_when_we_use_observers
+      Dir.chdir(app_path) do
+        `bundle exec rails g model user;
+         bundle exec rake db:migrate;
+         bundle exec rails g observer user;`
+
+        add_to_config "config.active_record.observers = :user_observer"
+
+        assert_equal "0", `bundle exec rails r "puts User.count"`.strip
+
+        app_file "lib/tasks/count_user.rake", <<-RUBY
+          namespace :user do
+            task :count => :environment do
+              puts User.count
+            end
+          end
+        RUBY
+
+        assert_equal "0", `bundle exec rake user:count`.strip
+      end
+    end
+
   end
 end

railties/test/application/runner_test.rb

@@ -57,5 +57,15 @@ def test_should_set_dollar_program_name_to_file
 
       assert_match "script/program_name.rb", Dir.chdir(app_path) { `bundle exec rails runner "script/program_name.rb"` }
     end
+
+    def test_with_hook
+      add_to_config <<-RUBY
+        runner do |app|
+          app.config.ran = true
+        end
+      RUBY
+
+      assert_match "true", Dir.chdir(app_path) { `bundle exec rails runner "puts Rails.application.config.ran"` }
+    end
   end
 end

railties/test/railties/railtie_test.rb

@@ -163,6 +163,22 @@ class MyTie < Rails::Railtie
       assert $ran_block
     end
 
+    test "runner block is executed when MyApp.load_runner is called" do
+      $ran_block = false
+
+      class MyTie < Rails::Railtie
+        runner do
+          $ran_block = true
+        end
+      end
+
+      require "#{app_path}/config/environment"
+
+      assert !$ran_block
+      AppTemplate::Application.load_runner
+      assert $ran_block
+    end
+
     test "railtie can add initializers" do
       $ran_block = false