Describe what we are protecting

actioncable/lib/action_cable/connection/base.rb

@@ -133,6 +133,8 @@ def on_close(reason, code) # :nodoc:
         send_async :handle_close
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         # The request that initiated the WebSocket connection is available here. This gives access to the environment, cookies, etc.
         def request

actioncable/lib/action_cable/connection/message_buffer.rb

@@ -28,6 +28,8 @@ def process!
         receive_buffered_messages
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         attr_reader :connection
         attr_reader :buffered_messages

actioncable/lib/action_cable/connection/subscriptions.rb

@@ -61,6 +61,8 @@ def unsubscribe_from_all
         subscriptions.each { |id, channel| remove_subscription(channel) }
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         attr_reader :connection, :subscriptions
 

actioncable/lib/action_cable/connection/web_socket.rb

@@ -32,6 +32,8 @@ def rack_response
         websocket.rack_response
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         attr_reader :websocket
     end

actionpack/lib/action_dispatch/http/mime_type.rb

@@ -278,6 +278,8 @@ def html?
 
     def all?; false; end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :string, :synonyms

actionview/lib/action_view/helpers/tags/translator.rb

@@ -14,6 +14,8 @@ def translate
           translated_attribute || human_attribute_name
         end
 
+        # TODO Change this to private once we've dropped Ruby 2.2 support.
+        # Workaround for Ruby 2.2 "private attribute?" warning.
         protected
 
           attr_reader :object_name, :method_and_value, :scope, :model

activemodel/lib/active_model/type/integer.rb

@@ -29,6 +29,8 @@ def serialize(value)
         result
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :range

activemodel/lib/active_model/type/registry.rb

@@ -21,6 +21,8 @@ def lookup(symbol, *args)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :registrations
@@ -55,6 +57,8 @@ def matches?(type_name, *args, **kwargs)
         type_name == name
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :name, :block

activemodel/lib/active_model/validations/acceptance.rb

@@ -56,6 +56,8 @@ def define_on(klass)
             klass.send(:attr_writer, *attr_writers)
           end
 
+          # TODO Change this to private once we've dropped Ruby 2.2 support.
+          # Workaround for Ruby 2.2 "private attribute?" warning.
           protected
 
             attr_reader :attributes

activemodel/test/cases/attribute_assignment_test.rb

@@ -16,6 +16,8 @@ def broken_attribute=(value)
       raise ErrorFromAttributeWriter
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_writer :metadata

activerecord/lib/active_record/associations/association_scope.rb

@@ -49,6 +49,8 @@ def self.get_bind_values(owner, chain)
         binds
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :value_transformation

activerecord/lib/active_record/attribute.rb

@@ -128,6 +128,8 @@ def encode_with(coder)
       coder["value"] = value if defined?(@value)
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :original_attribute

activerecord/lib/active_record/attribute/user_provided_default.rb

@@ -20,6 +20,8 @@ def with_type(type)
         self.class.new(name, user_provided_value, type, original_attribute)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :user_provided_value

activerecord/lib/active_record/attribute_mutation_tracker.rb

@@ -60,6 +60,8 @@ def force_change(attr_name)
       forced_changes << attr_name.to_s
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :attributes, :forced_changes

activerecord/lib/active_record/attribute_set.rb

@@ -98,6 +98,8 @@ def ==(other)
       attributes == other.attributes
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :attributes

activerecord/lib/active_record/attribute_set/builder.rb

@@ -90,6 +90,8 @@ def marshal_load(delegate_hash)
       @materialized = true
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :types, :values, :additional_types, :delegate_hash, :default

activerecord/lib/active_record/attribute_set/yaml_encoder.rb

@@ -31,6 +31,8 @@ def decode(coder)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :default_types

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

@@ -100,6 +100,8 @@ def add_to(table)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :name, :polymorphic, :index, :foreign_key, :type, :options

activerecord/lib/active_record/connection_adapters/postgresql/oid/bit.rb

@@ -41,6 +41,8 @@ def hex?
               /\A[0-9A-F]*\Z/i.match?(value)
             end
 
+            # TODO Change this to private once we've dropped Ruby 2.2 support.
+            # Workaround for Ruby 2.2 "private attribute?" warning.
             protected
 
               attr_reader :value

activerecord/lib/active_record/enum.rb

@@ -140,6 +140,8 @@ def assert_valid_value(value)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :name, :mapping, :subtype

activerecord/lib/active_record/railties/controller_runtime.rb

@@ -6,6 +6,8 @@ module Railties # :nodoc:
     module ControllerRuntime #:nodoc:
       extend ActiveSupport::Concern
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_internal :db_runtime

activerecord/lib/active_record/relation/predicate_builder.rb

@@ -66,6 +66,8 @@ def build(attribute, value)
       handler_for(value).call(attribute, value)
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :table

activerecord/lib/active_record/relation/predicate_builder/array_handler.rb

@@ -29,6 +29,8 @@ def call(attribute, value)
         array_predicates.inject { |composite, predicate| composite.or(predicate) }
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicate_builder

activerecord/lib/active_record/relation/predicate_builder/association_query_handler.rb

@@ -28,6 +28,8 @@ def call(attribute, value)
         predicate_builder.build_from_hash(queries)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicate_builder

activerecord/lib/active_record/relation/predicate_builder/base_handler.rb

@@ -9,6 +9,8 @@ def call(attribute, value)
         predicate_builder.build(attribute, value.id)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicate_builder

activerecord/lib/active_record/relation/predicate_builder/class_handler.rb

@@ -10,6 +10,8 @@ def call(attribute, value)
         predicate_builder.build(attribute, value.name)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicate_builder

activerecord/lib/active_record/relation/predicate_builder/polymorphic_array_handler.rb

@@ -21,6 +21,8 @@ def call(attribute, value)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicate_builder

activerecord/lib/active_record/relation/where_clause.rb

@@ -84,6 +84,8 @@ def self.empty
         @empty ||= new([], [])
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :predicates

activerecord/lib/active_record/relation/where_clause_factory.rb

@@ -27,6 +27,8 @@ def build(opts, other)
         WhereClause.new(parts, binds || [])
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :klass, :predicate_builder

activerecord/lib/active_record/table_metadata.rb

@@ -64,6 +64,8 @@ def polymorphic_association?
       association && association.polymorphic?
     end
 
+    # TODO Change this to private once we've dropped Ruby 2.2 support.
+    # Workaround for Ruby 2.2 "private attribute?" warning.
     protected
 
       attr_reader :klass, :arel_table, :association

activerecord/lib/active_record/type/adapter_specific_registry.rb

@@ -50,6 +50,8 @@ def <=>(other)
         priority <=> other.priority
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :name, :block, :adapter, :override
@@ -110,6 +112,8 @@ def priority
         super | 4
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :options, :klass

activerecord/lib/active_record/type_caster/connection.rb

@@ -12,6 +12,8 @@ def type_cast_for_database(attribute_name, value)
         connection.type_cast_from_column(column, value)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :table_name

activerecord/lib/active_record/type_caster/map.rb

@@ -11,6 +11,8 @@ def type_cast_for_database(attr_name, value)
         type.serialize(value)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :types

activerecord/lib/rails/generators/active_record/migration/migration_generator.rb

@@ -13,6 +13,8 @@ def create_migration_file
         migration_template @migration_template, "db/migrate/#{file_name}.rb"
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         attr_reader :migration_action, :join_tables
 

activesupport/lib/active_support/subscriber.rb

@@ -52,6 +52,8 @@ def subscribers
         @@subscribers ||= []
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
       attr_reader :subscriber, :notifier, :namespace

railties/lib/rails/generators/named_base.rb

@@ -32,6 +32,8 @@ def js_template(source, destination)
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
         attr_reader :file_name
 

railties/lib/rails/generators/resource_helpers.rb

@@ -23,6 +23,8 @@ def initialize(*args) #:nodoc:
         assign_controller_names!(controller_name.pluralize)
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
       protected
 
         attr_reader :controller_name, :controller_file_name