how to send data to controller ruby by ajax

Question

In application.js :

function get_cell_id(select_id)
{
  $.ajax({
      url: "/assign_variable",

      type: "GET",
       data:{channel:"abc"},
      error: function(){     
      alert('fail')
      }
  });
}

in static_pages_controller

def assign_variable
  @Four_Season_Set_Channel= params[:channel]
  end

in routes.rb

 match '/assign_variable', to:'static_pages#assign_variable', via: 'Get'

but i got alert fail, please help me fix it.

Check your console for what error is happening at the rails end ... — Sahil Grover
– Sahil Grover, Commented Nov 25, 2013 at 7:45

Satya Kalluri · Accepted Answer · 2013-11-25 07:42:20Z

1

You might need to be rendering something, be it HTML/plain-text. That should solve the problem. Else you would be getting a 204 error (NO CONTENT). Also, in the javascript-error-function, try alert/log the error-code. That will help too.

answered Nov 25, 2013 at 7:42

Satya Kalluri

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6 Comments

Midori Over a year ago

tks, can you tell me how can I display @Four_Season_Set_Channel in view ?

Satya Kalluri Over a year ago

Honestly,that's a bad question. I have no clue on that the @Four... is all about, neither the requirement. From what I see, you are sending across a hard-coded value "abc" to the server. And in the controller, what do you intent to do?

Midori Over a year ago

I send data from js and want to assign it to ruby-variable, finally, i want to show it to sure that data is assigned.

Satya Kalluri Over a year ago

OK. Looks like you are simply playing-around/learning. In the controller, use the code in gist.github.com/satyatechsavy/7637946#file-stackoverflow-help . Also, in the JS, add one more parameter "dataType" and the value to "script". This means, your ajax request is expecting a Javascript as a response. And in the controller, you are sending a JS-response to ALERT the value.

Midori Over a year ago

I did what you say and "page.alert @Four_Season_Set_Channel " doesn't work.

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