title: How to implement bulk insert in Rails 3
body: <p>I need to insert a array of emails  as different records into my contacts table. How can this be done.</p>
  
  <pre><code>Eg: @email = ["a@b.com", "c@d.com", "e@f.com", ... ]
  </code></pre>
  
  <p>I dont want to use.</p>
  
  <pre><code>  @email.each do |email|
       @contact = Contact.new
       @contact.email = email
       @contact.save
    end
  </code></pre>
  
  <p>This cause n insert quires. I just need a single insert query to insert these values. How can this be done in rails 3.0.9 (and ideally MySQL). Please help</p>