Rails - Jan 2006 - params on controller and view

Hi,
I have a link that says:
<%= link_to_remote("Data", :update =>
''pie_graph_div'', :url => {
:action => :show_pie_graph, :mode => ''nums'' }) %>

which calls *show_pie_graph*:
Controller:
	def show_pie_graph
		render :layout => false
		@mode = params[:mode]	
	end
View:
<img src="/surveys/make_pie_graph/<%=@mode%>" />

But @mode on view always is nil.
I can see the :mode from the view by calling params[:mode] but not
from the controller.

What''s the problem? Did I misunderstand something?

Thanks in advance,
- H

Human Dunnil wrote:
> Controller:
> 	def show_pie_graph
> 		render :layout => false
> 		@mode = params[:mode]	
> 	end
> View:
> <img src="/surveys/make_pie_graph/<%=@mode%>" />
> 
> But @mode on view always is nil.
> I can see the :mode from the view by calling params[:mode] but not
> from the controller.
Set @mode before calling render.


-- 
We develop, watch us RoR, in numbers too big to ignore.

Thanks

On 1/31/06, Mark Reginald James <mrj@bigpond.net.au>
wrote:
> Human Dunnil wrote:
>
> > Controller:
> >       def show_pie_graph
> >               render :layout => false
> >               @mode = params[:mode]
> >       end
> > View:
> > <img src="/surveys/make_pie_graph/<%=@mode%>" />
> >
> > But @mode on view always is nil.
> > I can see the :mode from the view by calling params[:mode] but not
> > from the controller.
>
> Set @mode before calling render.
>
>
> --
> We develop, watch us RoR, in numbers too big to ignore.
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

You need to swap the lines in the controller.

	def show_pie_graph
		@mode = params[:mode]	
		render :layout => false
	end

The ''render'' method uses the current state of the controller
at the time it
is called to setup the view.  At that time, @mode is not yet set, so that is
what the view sees.

-----Original Message-----
From: rails-bounces@lists.rubyonrails.org
[mailto:rails-bounces@lists.rubyonrails.org] On Behalf Of Human Dunnil
Sent: Monday, January 30, 2006 1:58 PM
To: rails@lists.rubyonrails.org
Subject: [Rails] params on controller and view

Hi,
I have a link that says:
<%= link_to_remote("Data", :update =>
''pie_graph_div'', :url => {
:action => :show_pie_graph, :mode => ''nums'' }) %>

which calls *show_pie_graph*:
Controller:
	def show_pie_graph
		render :layout => false
		@mode = params[:mode]	
	end
View:
<img src="/surveys/make_pie_graph/<%=@mode%>" />

But @mode on view always is nil.
I can see the :mode from the view by calling params[:mode] but not
from the controller.

What''s the problem? Did I misunderstand something?

Thanks in advance,
- H
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