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| -rw-r--r-- | railties/guides/source/2_3_release_notes.textile | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/railties/guides/source/2_3_release_notes.textile b/railties/guides/source/2_3_release_notes.textile index cc2e2dc20c..7f617a6763 100644 --- a/railties/guides/source/2_3_release_notes.textile +++ b/railties/guides/source/2_3_release_notes.textile @@ -365,6 +365,17 @@ You can write this view in Rails 2.3: <% end %> </erb> +When nesting across a +has_one+ relationship you will need to create a new blank object for the nested object before calling +fields_for+ in the view. + +A +build_<model_name>+ method has been created for this purpose: + +<erb> + <% @customer.build_order unless @customer.order %> + <% customer_form.fields_for :orders do |order_form| %> +</erb> + +Otherwise +@customer.order+ will return +nil+ and your form will fail. +has_many+ relationships do not require this extra step. + * Lead Contributor: "Eloy Duran":http://www.superalloy.nl/blog/ * More Information: ** "Nested Model Forms":http://weblog.rubyonrails.org/2009/1/26/nested-model-forms |