want to fetch data according pointStart to pointEnd using Highchart in rails 4

I am having data in Total model which contain date:datetime

i am able to print my whole data but not able to specify by date (pointStart to pointEnd)

it's not working.

series: 
      [{
        pointInterval: <%= 1.day * 1000 %>,
        pointStart: <%= Total.reorder(:date).first.date.to_i * 1000 %>,
        pointEnd: <%= (Time.now-27.day).to_i * 1000 %>,
        name: "total-user",
        data:<%= Total.all.collect(&:total_user)%>
      }]