autocompletion plugin should change the input field value on navigation through the result list via key down/up.

integration/public/javascripts/autocomplete-rails.js

@@ -65,10 +65,6 @@
             return false;
           }
         },
-        focus: function() {
-          // prevent value inserted on focus
-          return false;
-        },
         select: function( event, ui ) {
           var terms = split( this.value );
           // remove the current input

lib/rails3-jquery-autocomplete/autocomplete.rb

@@ -57,7 +57,7 @@ def autocomplete(object, method, options = {})
             items = {}
           end
 
-          render :json => json_for_autocomplete(items, options[:display_value] ||= method, options[:extra_data])
+          render :json => json_for_autocomplete(items, options[:display_value] ||= method, options[:extra_data], options[:distinct])
         end
       end
     end
@@ -73,24 +73,33 @@ def get_autocomplete_limit(options)
     #   # returns a Actor constant supposing it is already defined
     #
     def get_object(model_sym)
-      object = model_sym.to_s.camelize.constantize
+      model_sym.to_s.camelize.constantize
     end
 
     #
     # Returns a hash with three keys actually used by the Autocomplete jQuery-ui
     # Can be overriden to show whatever you like
     # Hash also includes a key/value pair for each method in extra_data
     #
-    def json_for_autocomplete(items, method, extra_data=[])
-      items.collect do |item|
-        hash = {"id" => item.id.to_s, "label" => item.send(method), "value" => item.send(method)}
+    def json_for_autocomplete(items, method, extra_data=[], distinct = false)
+      arr = []
+      items.each do |item|
+        hash = {}
+        hash['id'] = item.id.to_s unless distinct
+        hash['value'] = item.send(method)
+        hash['label'] = hash['value']
+
         extra_data.each do |datum|
           hash[datum] = item.send(datum)
         end if extra_data
         # TODO: Come back to remove this if clause when test suite is better
-        hash
+
+        next if distinct and arr.include?(hash)
+        arr << hash
       end
+      arr
     end
+
   end
 end