title: Rails 3: Retrieve all objects that have a certain value NOT equal to another value?
body: <p>I have a table called <code>Review</code> and i want to retrieve all review objects that don't have <code>:stage</code> equal to <code>"approve"</code>.</p>
  
  <p>so something like this: <code>Review.where(:stage not_equal_to "approve")</code></p>
  
  <p>How can i actually do this? and where can i find the list of calls i can make inside the <code>.where</code> such as less than, greater than etc. </p>