CODEWITHSUNDEEP
javascriptruby-on-rails
Sathya
Sathya

Reputation: 41

How to access an instance variable inside a Javascript function in Ruby on Rails application?

I have a form for editing profiles. Rails automatically generates the form id as 'edit_profile_##' where ## is the profile id of the current user(instance variable-@profile_id). I need to use this form id for my javascript functions. Is there a way to get the current user's profile id inside js? Or is there a way I can override the automatic id generation by rails?

Upvotes: 4

Views: 16327

Answers (3)

LifterCoder
LifterCoder

Reputation: 152

lets say you have @user = {'name'=>'steve'} in the controller

now your html page can render <p> <%=@user['name']%> </p>

now lets say you want to be able to access @user in your .js file; add thisThing & data-url to your tag <p id="thisThing" data-url="<%=@user%>" > <%=@user['name']%> </p>

in your .js file var userInfo = $('#thisThing').data('url')

now you got userInfo in your .js (its in string)

Upvotes: 0

Salil
Salil

Reputation: 47472

you have to send that using function parameter

.html.erb 

<script type="text/javascript">
   var user_id = <%= @profile_id %>; // for integer
   var user_name = '<%= @profile_name %>'; // for string

   abc(user_id)// this is your function in .js file

</script>

.js

 function abc(id){
   alert(""+id)
 }

Upvotes: 9

Francisco Soto
Francisco Soto

Reputation: 10392

Are you using normal *.html.erb views?

Can't you do something like :

<script type="text/javascript">
    user_id = <%= @profile_id %>;
</script>

?

Upvotes: 1

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