Wrap the .all method to return a DecoratedEnumerableProxy

lib/draper/base.rb

@@ -95,6 +95,14 @@ module Draper
     def self.decorate(input, context = {})
       input.respond_to?(:each) ? Draper::DecoratedEnumerableProxy.new(input, self, context) : new(input, context)
     end
+    
+    # Fetch all instances of the decorated class and decorate them.
+    #
+    # @param [Object] context (optional)
+    # @return [Draper::DecoratedEnumerableProxy]
+    def self.all(context = {})
+      Draper::DecoratedEnumerableProxy.new(model_class.all, self, context)
+    end
 
     # Access the helpers proxy to call built-in and user-defined
     # Rails helpers. Aliased to `.h` for convinience.

spec/draper/base_spec.rb

@@ -237,6 +237,16 @@ describe Draper::Base do
       subject_one.should_not == subject_two
     end
 
+    context '#all' do
+      it "should return a decorated collection" do
+        ProductDecorator.all.first.should be_instance_of ProductDecorator
+      end
+      
+      it "should accept a context" do
+        collection = ProductDecorator.all(:admin)
+        collection.first.context.should == :admin
+      end
+    end
   end
 
   describe "a sample usage with denies" do

spec/support/samples/product.rb

@@ -1,5 +1,9 @@
 class Product < ActiveRecord::Base
   include Draper::ModelSupport
+  
+  def self.all
+    [Product.new, Product.new]
+  end
 
   def self.scoped
     [Product.new]