将 javascript 传递给 Rails 助手

Question

I created a simple javascript on getting the URL on my browser under my application.js file:

function get_url {
 var url = window.location.href;
 return url;
}

Then on my helper/application_helper.rb file I called the javascript:

def get_full_url_helper
 javascript_tag(
     "get_url()\";"
 )
end

I tried to pass this on other helper just to see if its getting the full url:

def active_url
  get_full_url_helper
  byebug
end

Upon using byebug instead of getting the full url on the browser it returns this weird <script>//<![CDATA[] get_url </script> thing. For some reason its not calling the right function so I can get the text URL and so something with it.

Any idea what am I missing here?

Answer 1

Shouldn't your function get_url be:

function get_url() { // <--- parentheses were missing in your sample
 var url = window.location.href;
 return url;
}

Also, a simple way to debug what the issue might be (and perhaps find out where your issue might be) is to just modify your get_full_url_helper to be:

def get_full_url_helper
 javascript_tag(
     "console.log('hello!');"
 )
end

and then verify whether it is being invoked on your page in developer console tab in your browser.