ruby on rails link_to delete method not working

Have you included this line in your layout file?

<%= javascript_include_tag "application" %>

You must be add

//= require jquery
//= require jquery_ujs

in javascripts/application.js file

second, check in layout file,

javascript_include_tag "application"

is include or not?

Hope this help.

Solution:

I had commented out this from application.js when i created the project

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
// GO AFTER THE REQUIRES BELOW.
//
//= require jquery
//= require jquery_ujs
//= require_tree .

so re-adding it in solved the problem