Alias `object` to `#{model_name}`

If we have an `ArticleDecorator` there is going to be a method
added to it named `article` which is convenient for the user.

lib/draper/decorator.rb

@@ -16,6 +16,15 @@ module Draper
     # @return [Hash] extra data to be used in user-defined methods.
     attr_accessor :context
 
+    def self.inherited(klass)
+      begin
+        alias_name = klass.name.downcase.gsub(/decorator/, "").to_sym
+        klass.send(:define_method, alias_name) do
+          object
+        end
+      rescue; end
+    end
+
     # Wraps an object in a new instance of the decorator.
     #
     # Decorators may be applied to other decorators. However, applying a

spec/draper/decorator_spec.rb

@@ -361,6 +361,23 @@ module Draper
       end
     end
 
+    describe "aliasing object to wrapped model name" do
+      class ::ProductDecorator < Decorator; end
+      class ::Product
+        attr_reader :name
+        def initialize
+          @name = "bob"
+        end
+      end
+
+      it "aliases object to wrapped model name" do
+        decorator = ProductDecorator.new(Product.new)
+
+        expect(decorator.product).not_to be nil
+        expect(decorator.product.name).to eq "bob"
+      end
+    end
+
     describe "#to_model" do
       it "returns the decorator" do
         decorator = Decorator.new(Model.new)