Question

I’m starting a new Rails 3.2.6 application. My nested route is failing when I attempt to view the new nested form. I’ll first show the error, then all of the code involved.

URL attempting to access: http://localhost:3000/reports/1/expenses/new

No route matches {:action=>"show", :controller=>"expenses", :report_id=>#<Report id: 1, name: "Test Report", created_at: "2012-06-07 21:58:37", updated_at: "2012-06-07 21:58:37">}

routes.rb

resources :reports do
  resources :expenses
end

expenses_controller.rb

def new
  @report = Report.find(params[:report_id])
  @expense = @report.expenses.new
end

views/expenses/new.html.haml

%h1 New Expense
= render 'form'

views/expenses/_form.html.haml

= form_for [@report, @expense] do |f|

This is the link I’m attempting to click:

= link_to 'New Expense', new_report_expense_path(@report)

I can’t figure out why it’s trying to access the show action when I’m explicitly calling the new action.

Rake Routes

report_expenses     GET    /reports/:report_id/expenses(.:format)          expenses#index
                    POST   /reports/:report_id/expenses(.:format)          expenses#create
new_report_expense  GET    /reports/:report_id/expenses/new(.:format)      expenses#new
edit_report_expense GET    /reports/:report_id/expenses/:id/edit(.:format) expenses#edit
report_expense      GET    /reports/:report_id/expenses/:id(.:format)      expenses#show
                    PUT    /reports/:report_id/expenses/:id(.:format)      expenses#update
                    DELETE /reports/:report_id/expenses/:id(.:format)      expenses#destroy
        reports     GET    /reports(.:format)                              reports#index
                    POST   /reports(.:format)                              reports#create
     new_report     GET    /reports/new(.:format)                          reports#new
    edit_report     GET    /reports/:id/edit(.:format)                     reports#edit
         report     GET    /reports/:id(.:format)                          reports#show
                    PUT    /reports/:id(.:format)                          reports#update
                    DELETE /reports/:id(.:format)                          reports#destroy
           root            /                                               reports#index

UPDATE
Link to GitHub repo: https://github.com/ardavis/expense_report

Answer 1

The error is in the views/expences/_form.html.haml, last line

      = link_to 'Cancel', report_expense_path(@report), class: 'btn'

You probably meant

      = link_to 'Cancel', report_path(@report), class: 'btn'