8 files changed, 21 insertions, 15 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_types.rb b/actionpack/lib/action_dispatch/http/mime_types.rb
index 95881acac3..66cea88256 100644
--- a/actionpack/lib/action_dispatch/http/mime_types.rb
+++ b/actionpack/lib/action_dispatch/http/mime_types.rb
@@ -28,7 +28,7 @@ Mime::Type.register "application/x-www-form-urlencoded", :url_encoded_form
 
 # http://www.ietf.org/rfc/rfc4627.txt
 # http://www.json.org/JSONRequest.html
-Mime::Type.register "application/json", :json, %w( text/x-json application/jsonrequest application/vnd.api+json )
+Mime::Type.register "application/json", :json, %w( text/x-json application/jsonrequest )
 
 Mime::Type.register "application/pdf", :pdf, [], %w(pdf)
 Mime::Type.register "application/zip", :zip, [], %w(zip)
diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
index daaaed8df5..51a471fb23 100644
--- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb
@@ -149,6 +149,7 @@ module ActionDispatch
     def log_error(request, wrapper)
       logger = logger(request)
       return unless logger
+
       exception = wrapper.exception
 
       trace = wrapper.application_trace
@@ -163,11 +164,11 @@ module ActionDispatch
       end
     end
 
-    def log_array logger, array
-      array.map { |line| logger.fatal line}
+    def log_array(logger, array)
+      array.map { |line| logger.fatal line }
     end
 
-    def logger request
+    def logger(request)
       request.logger || ActionView::Base.logger || stderr_logger
     end
 
diff --git a/actionpack/test/dispatch/request/json_params_parsing_test.rb b/actionpack/test/dispatch/request/json_params_parsing_test.rb
index a3992ad008..64801bff39 100644
--- a/actionpack/test/dispatch/request/json_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/json_params_parsing_test.rb
@@ -37,9 +37,9 @@ class JsonParamsParsingTest < ActionDispatch::IntegrationTest
     )
   end
 
-  test "parses json params for application/vnd.api+json" do
+  test "does not parse unregistered media types such as application/vnd.api+json" do
     assert_parses(
-      {"person" => {"name" => "David"}},
+      {},
       "{\"person\": {\"name\": \"David\"}}", { 'CONTENT_TYPE' => 'application/vnd.api+json' }
     )
   end
@@ -143,13 +143,6 @@ class RootLessJSONParamsParsingTest < ActionDispatch::IntegrationTest
     )
   end
 
-  test "parses json params for application/vnd.api+json" do
-    assert_parses(
-      {"user" => {"username" => "sikachu"}, "username" => "sikachu"},
-      "{\"username\": \"sikachu\"}", { 'CONTENT_TYPE' => 'application/vnd.api+json' }
-    )
-  end
-
   test "parses json with non-object JSON content" do
     assert_parses(
       {"user" => {"_json" => "string content" }, "_json" => "string content" },
diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index 91d486e902..4533f3263f 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -655,6 +655,10 @@ module ActiveRecord
     #    # SELECT `posts`.* FROM `posts`  WHERE (('id = 1' OR 'author_id = 3'))
     #
     def or(other)
+      unless other.is_a? Relation
+        raise ArgumentError, "You have passed #{other.class.name} object to #or. Pass an ActiveRecord::Relation object instead."
+      end
+
       spawn.or!(other)
     end
 
diff --git a/activerecord/test/cases/batches_test.rb b/activerecord/test/cases/batches_test.rb
index 3602ee7ba2..84aac3e721 100644
--- a/activerecord/test/cases/batches_test.rb
+++ b/activerecord/test/cases/batches_test.rb
@@ -108,7 +108,7 @@ class EachTest < ActiveRecord::TestCase
     end
   end
 
-  def test_find_in_batches_should_finish_the_end_option
+  def test_find_in_batches_should_end_at_the_finish_option
     assert_queries(6) do
       Post.find_in_batches(batch_size: 1, finish: 5) do |batch|
         assert_kind_of Array, batch
@@ -316,7 +316,7 @@ class EachTest < ActiveRecord::TestCase
     end
   end
 
-  def test_in_batches_should_finish_the_end_option
+  def test_in_batches_should_end_at_the_finish_option
     post = Post.order('id DESC').where('id <= ?', 5).first
     assert_queries(7) do
       relation = Post.in_batches(of: 1, finish: 5, load: true).reverse_each.first
diff --git a/activerecord/test/cases/relation/or_test.rb b/activerecord/test/cases/relation/or_test.rb
index 28a0862f91..ce8c5ca489 100644
--- a/activerecord/test/cases/relation/or_test.rb
+++ b/activerecord/test/cases/relation/or_test.rb
@@ -82,5 +82,11 @@ module ActiveRecord
       assert_equal p.loaded?, true
       assert_equal expected, p.or(Post.where('id = 2')).to_a
     end
+
+    def test_or_with_non_relation_object_raises_error
+      assert_raises ArgumentError do
+        Post.where(id: [1, 2, 3]).or(title: 'Rails')
+      end
+    end
   end
 end
diff --git a/activerecord/test/cases/store_test.rb b/activerecord/test/cases/store_test.rb
index ab63f5825c..bce86875e1 100644
--- a/activerecord/test/cases/store_test.rb
+++ b/activerecord/test/cases/store_test.rb
@@ -177,6 +177,7 @@ class StoreTest < ActiveRecord::TestCase
     assert_equal [:color], first_model.stored_attributes[:data]
     assert_equal [:color, :width, :height], second_model.stored_attributes[:data]
     assert_equal [:color, :area, :volume], third_model.stored_attributes[:data]
+    assert_equal [:color], first_model.stored_attributes[:data]
   end
 
   test "YAML coder initializes the store when a Nil value is given" do
diff --git a/guides/source/5_0_release_notes.md b/guides/source/5_0_release_notes.md
index 5ae78eba04..d380ba8fce 100644
--- a/guides/source/5_0_release_notes.md
+++ b/guides/source/5_0_release_notes.md
@@ -768,6 +768,7 @@ framework it is. Kudos to all of them.
 [action-pack]:    https://github.com/rails/rails/blob/5-0-stable/actionpack/CHANGELOG.md
 [action-view]:    https://github.com/rails/rails/blob/5-0-stable/actionview/CHANGELOG.md
 [action-mailer]:  https://github.com/rails/rails/blob/5-0-stable/actionmailer/CHANGELOG.md
+[action-cable]:   https://github.com/rails/rails/blob/5-0-stable/actioncable/CHANGELOG.md
 [active-record]:  https://github.com/rails/rails/blob/5-0-stable/activerecord/CHANGELOG.md
 [active-model]:   https://github.com/rails/rails/blob/5-0-stable/activemodel/CHANGELOG.md
 [active-support]: https://github.com/rails/rails/blob/5-0-stable/activesupport/CHANGELOG.md