Merge branch 'master' into laurocaetano-fix_send_file

* master: (536 commits)
  doc, API example on how to use `Model#exists?` with multiple IDs. [ci skip]
  Restore DATABASE_URL even if it's nil in connection_handler test
  [ci skip] - error_messages_for has been deprecated since 2.3.8 - lets reduce any confusion for users
  Ensure Active Record connection consistency
  Revert "ask the fixture set for the sql statements"
  Check `respond_to` before delegation due to: https://github.com/ruby/ruby/commit/d781caaf313b8649948c107bba277e5ad7307314
  Adding Hash#compact and Hash#compact! methods
  MySQL version 4.1 was EOL on December 31, 2009 We should at least recommend modern versions of MySQL to users.
  clear cache on body close so that cache remains during rendering
  add a more restricted codepath for templates fixes #13390
  refactor generator tests to use block form of Tempfile
  Fix typo [ci skip]
  Move finish_template as the last public method in the generator
  Minor typos fix [ci skip]
  make `change_column_null` reversible. Closes #13576.
  create/drop test and development databases only if RAILS_ENV is nil
  Revert "Speedup String#to"
  typo fix in test name. [ci skip].
  `core_ext/string/access.rb` test what we are documenting.
  Fix typo in image_tag documentation
  ...

Conflicts:
	actionpack/CHANGELOG.md

1 files changed, 6 insertions, 2 deletions

diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index fb8f40cb9b..7be61d94c9 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -1,5 +1,6 @@
 require 'active_support/concern'
 require 'active_support/core_ext/class/attribute'
+require 'action_view/view_paths'
 require 'set'
 
 module AbstractController
@@ -13,6 +14,7 @@ module AbstractController
 
   module Rendering
     extend ActiveSupport::Concern
+    include ActionView::ViewPaths
 
     # Normalize arguments, options and then delegates render_to_body and
     # sticks the result in self.response_body.
@@ -20,7 +22,7 @@ module AbstractController
     def render(*args, &block)
       options = _normalize_render(*args, &block)
       self.response_body = render_to_body(options)
-      _process_format(rendered_format)
+      _process_format(rendered_format) if rendered_format
       self.response_body
     end
 
@@ -45,7 +47,7 @@ module AbstractController
     def render_to_body(options = {})
     end
 
-    # Return Content-Type of rendered content
+    # Returns Content-Type of rendered content
     # :api: public
     def rendered_format
       Mime::TEXT
@@ -102,6 +104,8 @@ module AbstractController
     # :api: private
     def _normalize_render(*args, &block)
       options = _normalize_args(*args, &block)
+      #TODO: remove defined? when we restore AP <=> AV dependency
+      options[:variant] = request.variant if defined?(request) && request.variant.present?
       _normalize_options(options)
       options
     end