nullify

nullify makes it easy to clean up blank attributes that result from creating ActiveRecord objects directly from form params. You may specify any number of attributes (including non-column attributes) to nullify.

Installation

script/plugin install git://github.com/laserlemon/nullify.git

Example

In your model:

class User < ActiveRecord::Base
  validates_presence_of :first_name, :last_name
  nullify :middle_name

  def name
    [first_name, middle_name, last_name].compact.join(' ')
  end
end

In your “new” view:

<% form_for @user do |f| %>
  <%= f.text_field :first_name %>
  <%= f.text_field :middle_name %>
  <%= f.text_field :last_name %>
  <%= submit_tag 'Save' %>
<% end %>

In your controller:

def create
  @user = User.create(params[:user])
end

In your “show” view:

<%=h @user.name %>