Finalizing support for including hash codes in Design documents

lib/couchrest/model/designs/view.rb

@@ -391,11 +391,9 @@ module CouchRest
           return self.result if result
           raise "Database must be defined in model or view!" if use_database.nil?
 
-          # Remove the reduce value if its not needed
+          # Remove the reduce value if its not needed to prevent CouchDB errors
           query.delete(:reduce) unless can_reduce?
 
-          # Save the design doc for the current database. This should be efficient
-          # and check for changes
           model.save_design_doc(use_database)
 
           self.result = model.design_doc.view_on(use_database, name, query.reject{|k,v| v.nil?})

lib/couchrest/model/support/couchrest_design.rb

@@ -15,8 +15,16 @@ CouchRest::Design.class_eval do
     base.delete('_rev')
     result = nil
     flatten =
-      lambda {|v|
-        v.is_a?(Hash) ? v.flatten.map{|v| flatten.call(v)}.flatten : v.to_s
+      lambda {|r|
+        (recurse = lambda {|v|
+          if v.is_a?(Hash)
+            v.to_a.map{|v| recurse.call(v)}.flatten
+          elsif v.is_a?(Array)
+            v.flatten.map{|v| recurse.call(v)}
+          else
+            v.to_s
+          end
+        }).call(r)
       }
     Digest::MD5.hexdigest(flatten.call(base).sort.join(''))
   end