Ruby variable to JS in controller

Hi,
this is all new to me, so please don’t get upset if my questions are
very obvious. I’m trying to display a ruby variable through JS alert
function in the controller. Hope it makes sense, here’s my example:

myController.rb
class …blah… < ApplicationCon…blah…
def someAction
@myRvariable = “lala”
render :text => “alert(<%[email protected]%>)”,
:content_type => “text/javascript”
end
end

myIndex.rhtml

<%= link_to_remote "Display Rvariable", :url => {:action => "someAction"} %>

So, I want to see an alertbox with “lala” when I click the link.
Thank you very much!

Okey, nevermind that last post, I’ve found a solution. It’s like this;

class …blah…
def someAction
@myRvariable = “lala”
render :update do |page|
page.alert @myRvariable
end
end
end

I would be really grateful for explanation of this, I still don’t know
why it works, and why the previous doesn’t.
Thanks!

Hi Ma Mr,

Ma Mr wrote:

I would be really grateful for explanation of this,
I still don’t know why it works, and why the
previous doesn’t.

The short answer is that the element (created by link_to_remote) that
submitted the request to the server told the server via the message type
(XMLHttpRequest) that the browser expected JS, not HTML, returned. Your
first attempt used render which returned just the HTML you wanted
displayed.
Your second returned the HTML along with the JS to display it.

hth,
Bill

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