Merge branch 'master' into adequaterecord

* master: (311 commits)
  Add a missing changelog entry for #13981 and #14035
  Revert "Fixed plugin_generator test"
  implements new option :month_format_string for date select helpers [Closes #13618]
  add factory methods for empty alias trackers
  guarantee a list in the alias tracker so we can remove a conditional
  stop exposing table_joins
  make most parameters to the AliasTracker required
  make a singleton for AssociationScope
  pass the association and connection to the scope method
  pass the tracker down the stack and construct it in the scope method
  clean up add_constraints signature
  remove the reflection delegate
  remove klass delegator
  remove railties changes. fixes #14054
  remove chain delegate
  remove scope_chain delegate
  Add verb to sanitization note
  fix path shown in mailer's templates
  updated Travis build status image url
  fix guide active_support_core_extensions. add Note to String#indent [ci skip]
  ...

Conflicts:
	activerecord/lib/active_record/associations/join_dependency.rb
	activerecord/test/cases/associations/association_scope_test.rb

1 files changed, 20 insertions, 8 deletions

diff --git a/actionpack/lib/action_controller/metal/mime_responds.rb b/actionpack/lib/action_controller/metal/mime_responds.rb
index d5e08b7034..1974bbf529 100644
--- a/actionpack/lib/action_controller/metal/mime_responds.rb
+++ b/actionpack/lib/action_controller/metal/mime_responds.rb
@@ -236,6 +236,18 @@ module ActionController #:nodoc:
     #     end
     #   end
     #
+    # You can also set an array of variants:
+    #
+    #   request.variant = [:tablet, :phone]
+    #
+    # which will work similarly to formats and MIME types negotiation. If there will be no
+    # :tablet variant declared, :phone variant will be picked:
+    #
+    #   respond_to do |format|
+    #     format.html.none
+    #     format.html.phone # this gets rendered
+    #   end
+    #
     # Be sure to check the documentation of +respond_with+ and
     # <tt>ActionController::MimeResponds.respond_to</tt> for more examples.
     def respond_to(*mimes, &block)
@@ -488,7 +500,7 @@ module ActionController #:nodoc:
           response
         else # `format.html{ |variant| variant.phone }` - variant block syntax
           variant_collector = VariantCollector.new(@variant)
-          response.call(variant_collector) #call format block with variants collector
+          response.call(variant_collector) # call format block with variants collector
           variant_collector.variant
         end
       end
@@ -519,15 +531,15 @@ module ActionController #:nodoc:
         end
 
         def variant
-          key = if @variant.nil?
-            :none
-          elsif @variants.has_key?(@variant)
-            @variant
+          if @variant.nil?
+            @variants[:none] || @variants[:any]
+          elsif (@variants.keys & @variant).any?
+            @variant.each do |v|
+              return @variants[v] if @variants.key?(v)
+            end
           else
-            :any
+            @variants[:any]
           end
-
-          @variants[key]
         end
       end
     end