call function fron ruby controller in javascript

Question

I want to perform an action write to file in controllers/static_pages_controller.rb:

def fileopen
        my_file = File.new("public/CHNAME1.txt","w") 
        my_file.write "\tfasf"
        my_file.close

    end

(it work well when i define it in helper and call it in view.)

in myview.html.erb, i want some thing like How can I do that? I tried in application.js

function readfile() {
  alert('readfile work')
  $.ajax({
  alert('ajax work')
      url: "/fileopen",
      type: "POST",
      ##don't know what to to to call fileopen
      }
  });
}

routes.rb

match '/fileopen', to:'static_pages#fileopen', via: 'get'

and it's seem nothing happen. Only the first alert work

karaxuna · Accepted Answer · 2013-11-23 09:58:15Z

3

You have syntax error, try this:

function readfile() {
  alert('readfile work');
  $.ajax({
      url: "/fileopen",
      type: "POST",
      success: function(){
          alert('ajax work');
      }
  });
}

I don't know ruby but route is on "GET" request and you are making "POST" request:

match '/fileopen', to:'static_pages#fileopen', via: 'get' // should be via: 'post'?

edited Nov 23, 2013 at 9:58

answered Nov 23, 2013 at 9:53

karaxuna

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2 Comments

Midori Over a year ago

tks, it helps me a lot , can I send some variable by Ajax, such as function readfile() { alert('readfile work'); $.ajax({ url: "/fileopen", type: "POST", success: function(){ senddata($variable1); senddata($variable2); } }); } and in fileopen I can use def fileopen my_file = File.new("public/CHNAME1.txt","w") my_file.write "$variable1" "$variable2" my_file.close end

karaxuna Over a year ago

You can send data like this:

$.ajax({       url: "/fileopen",       type: "POST",       data: { parameterName: 'parameterValue' }       success: function(){           alert('ajax work');       }   });

. read documentation here: api.jquery.com/jQuery.ajax

Vijay Chouhan · Accepted Answer · 2013-11-23 10:07:32Z

2

You can not use alert within ajax, If you want to use it then use in success and error methods

answered Nov 23, 2013 at 10:07

Vijay Chouhan

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