Deal with global config better between AR::Base and AR::Model

1 files changed, 36 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/configuration.rb b/activerecord/lib/active_record/configuration.rb
new file mode 100644
index 0000000000..d58ed82258
--- /dev/null
+++ b/activerecord/lib/active_record/configuration.rb
@@ -0,0 +1,36 @@
+require 'active_support/concern'
+
+module ActiveRecord
+  # This module allows configuration options to be specified in a way such that
+  # ActiveRecord::Base and ActiveRecord::Model will have access to the same value,
+  # and will automatically get the appropriate readers and writers defined.
+  #
+  # In the future, we should probably move away from defining global config
+  # directly on ActiveRecord::Base / ActiveRecord::Model.
+  module Configuration #:nodoc:
+    extend ActiveSupport::Concern
+
+    module ClassMethods
+    end
+
+    def self.define(name, default = nil)
+      singleton_class.send(:attr_accessor, name)
+
+      [self, ClassMethods].each do |klass|
+        klass.class_eval <<-CODE, __FILE__, __LINE__
+          def #{name}
+            ActiveRecord::Configuration.#{name}
+          end
+        CODE
+      end
+
+      ClassMethods.class_eval <<-CODE, __FILE__, __LINE__
+        def #{name}=(val)
+          ActiveRecord::Configuration.#{name} = val
+        end
+      CODE
+
+      send("#{name}=", default) unless default.nil?
+    end
+  end
+end