Form Errors

Clean up form error reporting in Rails with a nice little view helper.

Installation

Add this line to your application's Gemfile:

gem 'form_errors'

And then execute:

$ bundle

Or install it yourself as:

$ gem install form_errors

Usage

To display errors in your Rails form, you can call the display_errors view helper and pass along the object.

<%= simple_form_for(@product, html: { class: "form-horizontal" }) do |f| %>
  <%= display_errors(@product) %>
  <!-- ... -->
<% end %>

If you'd like to customize the error string within the h2 tag, you can add a second parameter.

<%= simple_form_for(@product, html: { class: "form-horizontal" }) do |f| %>
  <%= display_errors(@product, "We were unable to save that product.") %>
  <!-- ... -->
<% end %>

The helper applies the alert, alert-danger, and alert-dismissable classes to the wrapper element. It also includes a data-dismiss. If you're using bootstrap, it ties in perfectly.

<div class="alert alert-danger alert-dismissable">
  <button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
  <h2>
    We were unable to save that product.
  </h2>
  <ul>
    <li>Name can't be blank</li>
    <li>Product definition can't be blank</li>
  </ul>
</div>

The h2 message defaults to:

"#{ pluralize(object.errors.count, "error") } "\
"prohibited this #{ object.class.name.underscore.humanize.downcase } "\
"from being saved"

You can also pass html classes to the different DOM elements with:

display_errors(@object, 'Whoopsie', error_string_class: 'h4')

Contributing

Fork it ( http://github.com/johnotander/form_errors/fork )
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request