Add decorates_associations to decorate multiple associations

lib/draper/base.rb

@@ -69,6 +69,14 @@ module Draper
       end
     end
 
+    # A convenience method for decorating multiple associations. Calls
+    # decorates_association on each of the given symbols.
+    #
+    # @param [Symbols*] name of associations to decorate
+    def self.decorates_associations(*association_symbols)
+      association_symbols.each{ |sym| decorates_association(sym) }
+    end
+
     # Specifies a black list of methods which may *not* be proxied to
     # to the wrapped object.
     #

spec/draper/base_spec.rb

@@ -95,6 +95,16 @@ describe Draper::Base do
     end
   end
 
+  context('.decorates_associations') do
+    subject { Decorator }
+    it "decorates each of the associations" do
+      subject.should_receive(:decorates_association).with(:similar_products)
+      subject.should_receive(:decorates_association).with(:previous_version)
+
+      subject.decorates_associations :similar_products, :previous_version
+    end
+  end
+
   context(".model / .to_model") do
     it "should return the wrapped object" do
       subject.to_model.should == source