Added helpers to jbuilder

Author: gazay

lib/gon/jbuilder.rb

@@ -8,6 +8,8 @@ def handler(args, global = false)
           raise 'You should provide :template when use rabl with global variables'
         end
 
+        include_helpers
+
         data = parse_jbuilder \
           Gon::Base.get_template_path(options,'jbuilder'),
           Gon::Base.get_controller(options)
@@ -17,6 +19,12 @@ def handler(args, global = false)
 
       private
 
+      def include_helpers
+        unless self.class.include? ::ActionView::Helpers
+          self.class.send(:include, ::ActionView::Helpers)
+        end
+      end
+
       def parse_options_from(args)
         if old_api? args
           text =  "[DEPRECATION] view_path argument is now optional. "

spec/gon/jbuilder_spec.rb

@@ -26,6 +26,11 @@
         Gon.objects.length.should == 2
       end
 
+      it 'render json from jbuilder template with helpers' do
+        Gon.jbuilder 'spec/test_data/sample_with_helpers.json.jbuilder', :controller => controller
+        Gon.date.should == 'about 6 hours'
+      end
+
       it 'render json from jbuilder template with a partial' do
         controller.view_paths << 'spec/test_data'
         Gon.jbuilder 'spec/test_data/sample_with_partial.json.jbuilder', :controller => controller

spec/test_data/sample_with_helpers.json.jbuilder

@@ -0,0 +1 @@
+json.date distance_of_time_in_words(20000)