Rails助手方法问题

Question

I'm new to rails and am having what I think is a very simple issue.

I have a list of "tasks". When you click on a task, I want to update its row in the database to mark it as complete (changing the "status" column form 0 to 1).

Here is what the links look like in my view:

<td><%= link_to t.name, change_task_status_path(:id => t.id) %>

And here is what's in my tasks_controller.rb:

def change_task_status
  @t = Task.find_by_id(params[:id])
  @t.status = '1' # 1 = complete
  @t.save
  render :nothing => true
end

I cannot figure out how to format the link correctly! I get this error when loading the view:

undefined method `change_task_status_path' for #<#<Class:0x3a6c144>:0x3a69d54>

EDIT rake routes shows:

       tasks GET    /tasks(.:format)             tasks#index
             POST   /tasks(.:format)             tasks#create
    new_task GET    /tasks/new(.:format)         tasks#new
   edit_task GET    /tasks/:id/edit(.:format)    tasks#edit
        task GET    /tasks/:id(.:format)         tasks#show
             PUT    /tasks/:id(.:format)         tasks#update
             DELETE /tasks/:id(.:format)         tasks#destroy
      phases GET    /phases(.:format)            phases#index
             POST   /phases(.:format)            phases#create
   new_phase GET    /phases/new(.:format)        phases#new
  edit_phase GET    /phases/:id/edit(.:format)   phases#edit
       phase GET    /phases/:id(.:format)        phases#show
             PUT    /phases/:id(.:format)        phases#update
             DELETE /phases/:id(.:format)        phases#destroy
    projects GET    /projects(.:format)          projects#index
             POST   /projects(.:format)          projects#create
 new_project GET    /projects/new(.:format)      projects#new
edit_project GET    /projects/:id/edit(.:format) projects#edit
     project GET    /projects/:id(.:format)      projects#show
             PUT    /projects/:id(.:format)      projects#update
             DELETE /projects/:id(.:format)      projects#destroy

Answer 1

Put this in your routes.rb:

resources :tasks do
  member do
    get :change
  end
end

It will add the helper path change_task passing the task id.
And change your link to this:

<td><%= link_to t.name, change_task_path(:id => t.id) %>

And the controller:

def change

EDITED:

To make it an ajax call, you got it right, add :remote => true to your link like this:

<%= link_to t.name, change_task_path(:id => t.id), :remote => true %>    

This way, the response on your controller is expected to be on a js format.

def change
  # do your thing
  respond_to do |format|
    format.js
  end
end

When you do this, you are expected to have a change.js.erb file on your views folder that make all the changes to the page. Something like this:

$('#tasks_list').children().remove();
$('#tasks_list').html(
"<%= j(render('tasks_list')) %>"
);

Remember that if you do things this way, you will need a partial( _tasks_list.html.erb ).