anchor.diff:    <%= @log.content %>
   </div>
   
  -<% if @weather.present? %>
  +<% if @weathers.present? %>
   <div id="temperature_gauge"></div>
   
   <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
  
positive.code:     gaugeData = new google.visualization.DataTable();
      gaugeData.addColumn('number', 'Temperature');
      gaugeData.addRows(1);
      gaugeData.setCell(0, 0, 28);
  
      gauge = new google.visualization.Gauge(document.getElementById('temperature_gauge'));
      gauge.draw(gaugeData, gaugeOptions);
  
negative.code:   }
  })();
  </script>
  
  <div id="weather_chart"></div>
  
  <script>
  