Strange error.... ActionController::RoutingError

Hello, i have a problem, had a table called news and other called
news_images,
the first é for save news and other for save url for images associated
with news.
Make migrations for each table manual and db:migrate after that i run
scaffold for news, and generate model for news_image… put has_many
and belongs_to in file_column on news_image model and ok… when i
try access page for new News i get this error:

ActionController::RoutingError in News#new
news_url failed to generate from
{:action=>“show”, :controller=>“news”} - you may have ambiguous
routes, or you may need to supply additional parameters for this
route. content_url has the following required parameters:
[“news”, :id] - are they all satisfied?

Extracted source (around line #5):

2:
3: <%= error_messages_for :news %>
4:
5: <% form_for(@news) do |f| %>

I don’t understand why, i don’t had any other route with same name in
routes.rb, i can’t had tables with names like news?

Obrigado .

Some one can help?

Understand Jean, thanks.

On Jan 13, 3:51 pm, “Jean-François Trân” [email protected]

Daniel L. :

news_url failed to generate from
{:action=>“show”, :controller=>“news”} - you may have ambiguous
routes, or you may need to supply additional parameters for this
route. content_url has the following required parameters:
[“news”, :id] - are they all satisfied?

The word news is uncountable, so you have to specify a
:singular option with map.resources.

see :
http://somethinglearned.com/articles/2007/03/19/how-to-uncountable-names-in-restful-routes

-- Jean-François.

You aren’t defining @news in your edit method definition in your news
controller

On Jan 20, 2008 9:05 PM, Bregor [email protected] wrote:

9: <% form_for(@news) do |f| %>
All other are works, except edit…


Ryan B.
http://www.frozenplague.net
Feel free to add me to MSN and/or GTalk as this email.

Hello all!

I still don’t understand, what to do in news/edit.html.erb

when I try to get /news/1/edit (news with this id exists, of course) i
see following:

NoMethodError in News#edit

Showing news/edit.html.erb where line #9 raised:

You have a nil object when you didn’t expect it!
The error occurred while evaluating nil.to_sym

Extracted source (around line #9):

6:


7: <%= error_messages_for :news %>
8:

9: <% form_for(@news) do |f| %>

link to edit looks like: <%= link_to ‘Edit’,
edit_news_instance_path(news), :class=>“button long” %>

In routes.rb:

map.resources :news, :singular => ‘news_instance’

All other are works, except edit…

Actually the problem is not that @news is not defined in the edit
action
(it might be an additional problem)

The way I see it, he :singular option is only used to create
the the url-generation methods for the resource (e.g.
edit_news_instance_path, etc.)

This option however is not used by the form_for @news call to deduct
the name
of the url-generation-method. It just gets the singular class name of
the News class
from the inflections, hence instead of edit_news_instance_path,
edit_news_path
is called, which, of course, does not exist.

A workaround might be specifying the :url option in form_for, although
I’ve had
trouble with this, too, at least when using namespaced resources.

I hope this helps

Daniel L. wrote:

Hello, i have a problem…

In file:
your_app_name\config\initializers\inflections.rb
add string: inflect.uncountable %w( news )
and read comments

me wrote:

In file:
your_app_name\config\initializers\inflections.rb
add string: inflect.uncountable %w( news )
and read comments
My appologies, add :

Inflector.inflections do |inflect|
inflect.uncountable %w( news )
end

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