Rails error "NoMethodError" - My first ruby app

Hi,

I am absolutely and totally new to rails, so the answer is probably very simple. Here goes:

My page is generating this error

NoMethodError in Tasks#new
Showing app/views/tasks/new.erb where line #3 raised:

undefined method `tasks_path' for #

Here is the view:

<% form_for(@task) do |f| %>
    <%= f.error_messages %>

    <%= f.label :description %>:
    <%= f.text_field :description %><br />

    <%= f.label :priority %>:
    <%= collection_select(:news, :priority_id, Priority.find(:all), :id, :description) %><br />

    <%= f.submit "Add Task" %>

<% end %>

The controller:

class TasksController < ApplicationController
    def index
     @all_tasks = Task.find(:all, :order => :id)
    end

    def new
     @task = Task.new
    end ...(more)

and the model:

I can't see a problem, but like I said, I'm clueless so far. Thanks!

class Task < ActiveRecord::Base
    validates_presence_of :description

    belongs_to :priority
    has_and_belongs_to_many :staff
    has_and_belongs_to_many :catagory

end

From stackoverflow

• Do you have

  map.resources :tasks
  

  in your routes?

  doctororange : Oh, you're right on. After adding that, I was able to use form_for with @task

  Jarrod : If you've got @task = Task.new in your action, the form_for(@task) references the empty task object. :task would make your form submit to tasks/new instead of a RESTful task/ with method='post'.

• Have you generated this example using the scaffold generator? Because if not it might be that you forgot to define the ressource url mapping in the routes.rb:

  --- a/config/routes.rb
  +++ b/config/routes.rb
  @@ -1,4 +1,6 @@
   ActionController::Routing::Routes.draw do |map|
  +  map.resources :tasks
  +
  

  Don't forget to restart webrick after you've added the route!

  reto : Also checkout 'http://www.railsbrain.com/api/rails-2.3.2/doc/index.html?a=M000295&name=resources' Hmm.. and @task should work.

• Thanks for the answers.

  As predicted, as simple problem.

  <% form_for(@task) do |f| %>
  

  should be:

  <% form_for(:task) do |f| %>
  

  Funny how you always find the answer to a question right after you post it! Thanks again.

• Regarding this code:

  @all_tasks = Task.find(:all, :order => :id)
  

  You don't need to specify order by id because it's the default behavior. So this should suffice.

  @all_tasks = Task.find(:all)
  

  And this can be further condensed to the following

  @all_tasks = Task.find.all
  

  Furthermore, a rails convention is to name your instance variable @tasks

  @tasks = Task.find.all
  

  Have fun with Rails.

  doctororange : Thanks. Task.find.all gives the error "Couldn't find Task without an ID" ~$ ruby --version ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux] ~$ rails --version Rails 2.3.2