Question

For some reason I can’t figure out why the nested elements are not appearing in this edit form.

class Book < ActiveRecord::Base
  has_many :pages
  accepts_nested_attributes_for :pages
end

class Page < ActiveRecord::Base
  belongs_to :book
end

Heres the form

<%= form_for(:book) do |f| %>
  <p><%= f.text_field(:title) %></p>
  <%= f.fields_for :pages do |page| %>
    <p><%= page.text_field(:page_no) %></p>
  <% end %>
<% end %>

Controller

def edit
    @book = Book.find(params[:id])
end

It displays the title of the book but nothing appears when it goes to list the page_nos. Also I tried calling :pages and it returns an array of pages so I don’t see why the form isn’t being built.

Am I overlooking something in the model I need to change?

Answer 1

Try with

<%= form_for(@book) do |f| %>

instead of

<%= form_for(:book) do |f| %>