Deprecate ActiveRecord::Base.colorize_logging.

activerecord/lib/active_record/base.rb

@@ -516,14 +516,6 @@ def self.reset_subclasses #:nodoc:
     cattr_accessor :pluralize_table_names, :instance_writer => false
     @@pluralize_table_names = true
 
-    ##
-    # :singleton-method:
-    # Determines whether to use ANSI codes to colorize the logging statements committed by the connection adapter. These colors
-    # make it much easier to overview things during debugging (when used through a reader like +tail+ and on a black background), but
-    # may complicate matters if you use software like syslog. This is true, by default.
-    cattr_accessor :colorize_logging, :instance_writer => false
-    @@colorize_logging = true
-
     ##
     # :singleton-method:
     # Determines whether to use Time.local (using :local) or Time.utc (using :utc) when pulling dates and times from the database.
@@ -557,6 +549,13 @@ def self.reset_subclasses #:nodoc:
     self.default_scoping = []
 
     class << self # Class methods
+      def colorize_logging(*args)
+        ActiveSupport::Deprecation.warn "ActiveRecord::Base.colorize_logging and " <<
+          "config.active_record.colorize_logging are deprecated. Please use " << 
+          "Rails::Subscriber.colorize_logging or config.colorize_logging instead", caller
+      end
+      alias :colorize_logging= :colorize_logging
+
       # Find operates with four different retrieval approaches:
       #
       # * Find by id - This can either be a specific id (1), a list of ids (1, 5, 6), or an array of ids ([5, 6, 10]).

activerecord/test/cases/base_test.rb

@@ -992,7 +992,7 @@ def test_mass_assignment_protection
   end
 
   def test_mass_assignment_protection_against_class_attribute_writers
-    [:logger, :configurations, :primary_key_prefix_type, :table_name_prefix, :table_name_suffix, :pluralize_table_names, :colorize_logging,
+    [:logger, :configurations, :primary_key_prefix_type, :table_name_prefix, :table_name_suffix, :pluralize_table_names,
       :default_timezone, :schema_format, :lock_optimistically, :record_timestamps].each do |method|
       assert  Task.respond_to?(method)
       assert  Task.respond_to?("#{method}=")