Rails2/Rails3 nested form, fields_for not displayed

Rails
1

Hi all,

I’m having some issues to create a nested form with Rails3, the fields
for creating my “children” object are not displayed in the form of its
parent form.

The code below is working under rails2 and not rails3, after reading
the rails3 release note, they didn’t make any changes about nested
attributes. So it should work, or maybe I’ve missed something…

#model/book.rb
class Book < ActiveRecord::Base
has_one :author
accepts_nested_attributes_for :author
end

#model/author.rb
class Author < ActiveRecord::Base
belongs_to :book
end

#views/books/_form.html.erb
<%= form_for(@book) do |f| %>
…

<%= f.label :title %>
<%= f.text_field :title %> 
    <!-- For some reasons this block doesn't show up under rails3

but in rails 2 it’s working -->
<% f.fields_for :author do |author_form|%>


<%= author_form.label :name%>
<%= author_form.text_field :name %>

<% end %>
<%= f.submit %>
<% end %>

#controllers/books_controller.rb
def new
@book = Book.new
@book.build_author

respond_to do |format|
  format.html # new.html.erb
  format.xml  { render :xml => @book }
end

end

I would appreciate any help, thanks. And I apologize if I made any
english errors.
Nico.

2 
    <!-- For some reasons this block doesn't show up under rails3

but in rails 2 it’s working -->
<% f.fields_for :author do |author_form|%>


<%= author_form.label :name%>
<%= author_form.text_field :name %>

<% end %>

replace
<% f.fields_for :author do |author_form|%>
with
<%= f.fields_for :author do |author_form|%>

3

Not used Rails 3 yet, but shouldn’t your symbol be plural (:authors)
since you have a one-to-many relationship?

4

It’s working. thanks a lot! It was a stupid error from me :).

5

Nicolas,
Sorry to drag up this old topic, but I’m having the exact same
problem. So what was your error? I assume I’m making the same mistake.

Thanks in advance,
Chris

6

thank you thank you thank you!!! I’m starting to play with Ruby (being
a python man myself), and I’ve been loosing my mind for two days with
this!!!

7

Solrac C. wrote in post #945648:

<% f.fields_for :author do |author_form|%>
with
<%= f.fields_for :author do |author_form|%>

Thanks you very much
It help me too!