尽管有text / javascript内容类型，但仍未执行rails 3 javascript

Question

I am performing an non-ajax GET request on a page. In the corresponding controller/action, I am returning javascript. However, this javascript is not being executed. Rather, it is showing up as text on my browser.

The action being hit:

def my_action
  render :template => 'shared/_alert.js.erb', :content_type => 'text/javascript'
end

The js.erb file:

alert("hello");

Charles HTTP Request:

GET /my_action HTTP/1.1
Host: 172.16.151.186:3000
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/534.52.7 (KHTML, like Gecko) Version/5.1.2 Safari/534.52.7
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Cache-Control: max-age=0
Accept-Language: en-us
Accept-Encoding: gzip, deflate
Cookie: _session_id=BAh7CEkiD3Nlc3Npb25faWQGOgZFRiIlZGZhMjFkOWRlNDQ3ZThlYjRiMzljNzMyMjg0N2E2YmJJIhBfY3NyZl90b2tlbgY7AEZJIjFtZ05jUmsxZlRIQ1FCaVVLczVCeUF2STNtY1gzUzhucTk3alF4RjVsVklFPQY7AEZJIhRjdXJyZW50X3VzZXJfaWQGOwBGSSIpYjMwNzg5NzItNDQzNi0xMWUxLTk5YzUtNGY3NjNlNzJhZmIyBjsARg%3D%3D--e345e67c4b130d2f3e4bdb48bd3d5d4f892f8272
Pragma: no-cache
Connection: keep-alive

Charles HTTP Response:

HTTP/1.1 200 OK 
Content-Type: text/javascript; charset=utf-8
Etag: "9b9a7c156c510c98d7fd224227f7431f"
Cache-Control: max-age=0, private, must-revalidate
X-Ua-Compatible: IE=Edge
X-Runtime: 0.246125
Server: WEBrick/1.3.1 (Ruby/1.9.2/2011-07-09)
Date: Sat, 21 Jan 2012 15:23:09 GMT
Content-Length: 15
Connection: Keep-Alive
Set-Cookie: _session_id=BAh7CEkiD3Nlc3Npb25faWQGOgZFRiIlZGZhMjFkOWRlNDQ3ZThlYjRiMzljNzMyMjg0N2E2YmJJIhBfY3NyZl90b2tlbgY7AEZJIjFtZ05jUmsxZlRIQ1FCaVVLczVCeUF2STNtY1gzUzhucTk3alF4RjVsVklFPQY7AEZJIhRjdXJyZW50X3VzZXJfaWQGOwBGSSIpYjMwNzg5NzItNDQzNi0xMWUxLTk5YzUtNGY3NjNlNzJhZmIyBjsARg%3D%3D--e345e67c4b130d2f3e4bdb48bd3d5d4f892f8272; path=/; HttpOnly

alert("hello");

Could some help me troubleshoot this?

Thanks.

Answer 1

If you want to achieve what you stated in the comments: "User wants to go to page Y from page X, but there's an error." The standard way to do this is set the flash[:error] hash to your message, and redirect back to the referring page. In your layout you'd have some erb snippet like:

<% if flash[:error %>
  <div class='flash error'><%= flash[:error] %></div>
<% end %>

And on your controller you'd set up a before filter like:

before_filter :validate_user

def before_filter
  if <some condition is not met>
    flash[:error] = "Oops...you are not logged in"
    redirect_to :back   # or some_defined_path
  end
end