@kobaltz i would like to know is there built-in time validation, like if user select 2-3-2017 and 12:00pm to 1:00pm then if user again try to choose same date with same time range.

can you tell me me is there any option already available or not?

Hi  i would like to know is there built-in time validation, like if user select 2-3-2017 and 12:00pm to 1:00pm then if user again try to choose same date with same time range.

can you tell me me is there any option already available or not?

bootstrap event $('#edit_contact').modal('show') inside of popup its appear below the page is there any solution to solve this problem.

<%= link_to_remove_association "remove task", f, class: 'btn btn-primary btn-xs' %>  not working 

my mistake i forgot to add nested-fields class in task_fields partial btw great tutorial, keep up the good work.