I want to use the current user's through my coffee script. But if I try to use current_user in my CoffeeScript, I get the undefined variable current_user in console of browser.
Is there any way to access it in coffee script? What I exactly wish to do is as follows:
current_user.updated_at < Date.now().getTime()
I need it to implement this in my Rails app.
For raw javascript + erb
<script type="text/javascript">
var my_foo = <%= some_ruby_expression %>
</script>
e.g.
<script type="text/javascript">
var user_name = "<%= current_user.name %>";
</script>
except var keyword, this is a valid coffeescript code, I believe.
Btw, is it really what you are asking for? - I don't know -))
UPDATE
current_user is a ruby/active_record object. You might assign it to a javascript variable, but can't use as you did in ruby.
But below snippet might give you some idea. I've created a rails project, and scaffolded a page model.
<p id="notice"><%= notice %></p>
<p>
<strong>Title:</strong>
<%= @page.title %>
</p>
<p>
<strong>Email:</strong>
<%= @page.email %>
</p>
<p>
<strong>Comments:</strong>
<%= @page.comments %>
</p>
<script type="text/javascript">
var mypage = '<%= raw @page.to_json %>'; // attention to single quotes
console.log(mypage);
</script>
<%= link_to 'Edit', edit_page_path(@page) %> |
<%= link_to 'Back', pages_path %>
Then you can parse and use it as an ordinary javascript object. Below picture show, how I did it.
UPDATE #2
do it in coffeescript file.
window.onload = ->
myvar = '<%= raw @page.to_json %>'
myvarAsObj = JSON.parse(myvar)
do_something_with myvarAsObj
return
current_user which is a helper's variable provided by devise gem.
Coffee script is turned into javascript and runs on the browser. What you want to do is render current_user.updated_at into a node in HTML, then use coffee script to extract that value.
Javascript files are (more or less) static files which will be executed by the browser. I don't know if you ever deployed an rails app in production. You'll run the command bin/rake assets:precompile which will generate one (or more) massive javascript file(s). So how would you find out the current user at this time? there's no HTTP request at all, so how could there be a user?
So to do this, you could either write the current user to a HTML node and then read it again with javascript (coffeescript) (which in my opinion is the best way) or you could print a script tag into your view containing what you want from your user.
