How to call a method on an object in a nested form in Ruby on Rails 3?

Question

I have these two models

class Invoice < ActiveRecord::Base
  has_many :items      
  accepts_nested_attributes_for :items
  ...
end

class Item < ActiveRec         


        

Answer 1

You are calling a method not on your model object, but on f, which is a form helper (ActionView::Helpers::FormBuilder). Error message gives a hint to this.

To call on the item, you need to replace

<%= f.total %>

with

<%= f.object.total %>