You have a nil object when you didn't expect it?

Rails
1

Hello,

I’m trying a simple AJAX test link with the following code inside my
view :

<%= link_to_remote( “[Total]”, { :action => “total”, :update =>
“letotal” } ) %>

In my controller I put :

def total
@res = Person.find(:all)
render_text “Il y a #{@res.size} personnes dans le carnet”
end

When I test it, I get the following error message :

You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]

Thank you for your help

2

On 20 Aug 2008, at 17:13, [email protected] wrote:

In my controller I put :

def total
@res = Person.find(:all)
render_text “Il y a #{@res.size} personnes dans le carnet”
end

Unrelated to this but it’s way way more efficient to say
@number_of_people = Person.count rather that use Person.find(:all).size

When I test it, I get the following error message :

You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]

What’s the line throwing that exception ?

Fred

3

*on <%= link_to_remote( “[Total]”, { :action => “total”, :update =>

“letotal” } ) %>*

If I put it in comment there’s no error.

On Wed, Aug 20, 2008 at 6:17 PM, Frederick C. <

4

c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/url_rewriter.rb:102:in
rewrite_url' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/url_rewriter.rb:88:inrewrite’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_controller/base.rb:621:in
url_for' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/url_helper.rb:76:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/url_helper.rb:76:in
url_for' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/prototype_helper.rb:461:inremote_function’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-2.1.0/lib/action_view/helpers/prototype_helper.rb:255:in
link_to_remote' app/views/carnet/voir.html.erb:15:in_run_erb_47app47views47carnet47voir46html46erb’

On Wed, Aug 20, 2008 at 6:17 PM, Frederick C. <

5

On 20 Aug 2008, at 17:19, Alexandre Brillant wrote:

on <%= link_to_remote( “[Total]”, { :action => “total”, :update =>

“letotal” } ) %>

If I put it in comment there’s no error.

D’oh. That should be link_to_remote “[Total”], :url => {:action =>
‘total’}, :update => ‘letotal’

Fred

6

Thank you Fred

On Wed, Aug 20, 2008 at 6:20 PM, Frederick C. <