fix error

app/controllers/ruling_buses_controller.rb

@@ -48,12 +48,15 @@ private
 		cache = RulingBusCache.where(bus_info_id: bus_info_id).first
 		if (cache.nil? || cache.updated_at < @time_thresh)
 			tmp = RulingBusesHelper.get_stop_time(bus_info,@bus_locale)
-			if cache.nil?
-				RulingBusCache.create(dict: tmp, bus_info_id: bus_info_id)
+			if !tmp.nil?
+				if cache.nil?
+					RulingBusCache.create(dict: tmp, bus_info_id: bus_info_id)
+				else
+					cache.update_attributes(dict: tmp, updated_at: Time.now)
+				end
 			else
-				cache.update_attributes(dict: tmp)
+				tmp = cache.dict
 			end
-			tmp
 		else
 			tmp = cache.dict
 		end

app/helpers/ruling_buses_helper.rb

@@ -126,6 +126,9 @@ module RulingBusesHelper
               end.join(' or ')
     url = "/Bus/EstimatedTimeOfArrival/City/#{city}?$select=Direction,RouteName,NextBusTime&$filter=#{filters}&$format=JSON&$orderby=RouteName/#{locale}"
     bus_data = JSON.parse(self.get(url).body)
+    if bus_data.class==Hash
+      return nil
+    end
     if !cache_data_pbus.blank?
       filters = cache_data_pbus.map do |k,v|
                   ("((StopName/#{locale} eq '#{k[0][locale]}') and Direction eq #{k[2]} and " +
@@ -136,7 +139,11 @@ module RulingBusesHelper
     else
       pbus_data = []
     end
-    bus_data + pbus_data
+    if pbus_data.class==Hash
+      bus_data
+    else
+      bus_data + pbus_data
+    end
   end
   
   def get_input_name