rails 3 form_for doesn't output anything

Question

Hi I have any form with nested form, for example

<% form_for :main do |f| %>
  trying to insert code here
  <% fields_for :nested do |nested_form| %>
    <%= nested_form.text_field :description %>
  <% end %>
<% end %>

And then I am trying to insert anything to a main form, nested form doesn't produce any output. It outputs only when it is the only object in main form. Any suggestions?

philnash · Accepted Answer · 2010-11-25 15:04:36Z

21

From the Rails 3 documentation examples you need to write your form_for like this:

<%= form_for :main do |f| %>
  # trying to insert code here
   <%= fields_for :nested do |nested_form| %>
    <%= nested_form.text_field :description %>
  <% end %>
<% end %>

Note the <%= for both form_for and fields_for

answered Nov 25, 2010 at 15:04

philnash

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4 Comments

henrik Over a year ago

Thanks a lot. I was looking to those examples but missed that ^^

philnash Over a year ago

I bet, since it has changed, it's confused a bunch of people!

user191766 Over a year ago

I believe it should still output the form, but gives a warning in the console saying it's deprecated without the '='.

m33lky Over a year ago

Just ran into the same issue in Rails 3.2. No warning.

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