form_for error messages in Ruby on Rails

Question

What is the preferred way to display validation error messages using form_for in Rails 4?

<%= form_for @post do |f| %>
  ...
<% end %&g         


        

Answer 1

Same as Rails 3 -- see f.error_messages in Rails 3.0 or http://railscasts.com/episodes/211-validations-in-rails-3 for many different possibilities.

My personal preference is to use simple_form and have it put the error next to the input.