Pass values from javascript into rails code [duplicate]

Question

Can I pass values from javascript into rails code ?? Here my example:

<script>
function upload_fun() {
        $.ajax({
            url : '/upload',
            datatype : 'json',
            data :{
                file : file,
            },
            success : function(data_get) {
               console.log(data_get)
               #example: data_get = "1234"
            },
     });
}
</script>
<div>
   #I wan't to put data_get in javascript to rails code like this: 
   <% @data = Data.find_by_dataname(:dataname => "data_get")%>
</div>

Can I pass value like that?

No, in short - JavaScript is evaluated at client side (in browser), ERB (html templating in Rails) is evaluated at server side. They are not directly connected. — AlkH
– AlkH, Commented Mar 6, 2015 at 7:57
You can create a method in your respective controller to receive value from ajax call. Not sure how you intend to use it — Abuzar Hasan
– Abuzar Hasan, Commented Mar 6, 2015 at 8:22

Michal · Accepted Answer · 2015-03-06 08:39:36Z

0

You can create a method that returns a ready-made HTML and then injecct ($().append()) it into your main file.

There's a guide for working with JS in Rail: http://edgeguides.rubyonrails.org/working_with_javascript_in_rails.html

answered Mar 6, 2015 at 8:39

Michal

7532 gold badges6 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Dabrorius · Accepted Answer · 2015-03-06 09:52:12Z

0

EDIT: oh you want to do it the other way around :D Well I'll leave this answer anyway, even though it's wrong.

You can store values in data html attribute.

<div id="user" data-name="<%= @user.name %>">
</div>

And then read it using jQuery like this.

var name = $("#user").data("name");

If you are using older jQuery than 1.4.3 you will have to use a bit longer syntax.

var name = $("#user").attr("data-name");

edited Mar 6, 2015 at 9:52

answered Mar 6, 2015 at 9:41

Dabrorius

1,0391 gold badge9 silver badges17 bronze badges

Collectives™ on Stack Overflow

Pass values from javascript into rails code [duplicate]

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related