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render_to_string is completely broken

#296

class MyController < ApplicationController
  def index	 
    @x = render_to_string :controller => 'i_do_not_exists'
  end
end

There is no exception raised if I use :controller which does not exist at all. Whatever options I use, @x always contains app/views/my/index.html.erb file content (even for existing controllers render_to_string ignore every parameter)

Reported by Jaroslaw Zabiello · June 2nd, 2008 @ 09:12 AM

Activity

Pratik
- State changed from new to incomplete
Use render_to_string :template => 'i_do_not_exists/index'
What is the behavior in Rails 2.0.x ?

June 2nd, 2008 @ 12:18 PM

Jaroslaw Zabiello

I do NOT want to render just another template (without its action). I want to render another action. I have just checked and I see it is broken for RoR 2.0.2 and 2.1.0 as well. Therefore information displayed in api.rubyonrails.org is misleading and wrong (capitalization is mine):

render_to_string(options = nil, &block) 

Renders according to THE SAME RULES AS RENDER, but returns the result in a string instead of sending it as the response body to the browser.

# app/views/controllers/my_controller.rb:

class MyController < ApplicationController
  def index 
    @slot = render_to_string :action => 'second'
  end
  
  def second    
    @var = 'World'
    render :text => 'It will never be displayed from host/my!' 
  end
end
       

# app/views/my/index.html.erb:

Slot: <%= @slot %> 
         
# app/views/my/second.html.erb:

Hello <%= @msg %>!

Result at http://localhost:3000/my:

Result:

Slot: Hello !

The @msg variable was not rendered at all. render :text was also ignored at all. It looks like render_to_string ignores Ruby code in the action.

June 2nd, 2008 @ 01:46 PM

Pratik
- State changed from incomplete to invalid
You cannot render another action. render_to_string is only for rendering templates. It will not call action code.

June 2nd, 2008 @ 01:49 PM