1 files changed, 29 insertions, 0 deletions
diff --git a/activemodel/lib/active_model/naming.rb b/activemodel/lib/active_model/naming.rb
index ca1e9f0ee8..dc83932dde 100644
--- a/activemodel/lib/active_model/naming.rb
+++ b/activemodel/lib/active_model/naming.rb
@@ -57,6 +57,35 @@ module ActiveModel
     def model_name
       @_model_name ||= ActiveModel::Name.new(self)
     end
+
+    # Returns the plural class name of a record or class. Examples:
+    #
+    #   ActiveModel::Naming.plural(post)             # => "posts"
+    #   ActiveModel::Naming.plural(Highrise::Person) # => "highrise_people"
+    def self.plural(record_or_class)
+      model_name_from_record_or_class(record_or_class).plural
+    end
+
+    # Returns the singular class name of a record or class. Examples:
+    #
+    #   ActiveModel::Naming.singular(post)             # => "post"
+    #   ActiveModel::Naming.singular(Highrise::Person) # => "highrise_person"
+    def self.singular(record_or_class)
+      model_name_from_record_or_class(record_or_class).singular
+    end
+
+    # Identifies whether the class name of a record or class is uncountable. Examples:
+    #
+    #   ActiveModel::Naming.uncountable?(Sheep) # => true
+    #   ActiveModel::Naming.uncountable?(Post) => false
+    def self.uncountable?(record_or_class)
+      plural(record_or_class) == singular(record_or_class)
+    end
+
+    private
+      def self.model_name_from_record_or_class(record_or_class)
+        (record_or_class.is_a?(Class) ? record_or_class : record_or_class.class).model_name
+      end
   end
   
 end