title: Rails: Is that possible to define named scope in a module?
body: <p>Say there are 3 models: A, B, and C. Each of these models has the <code>x</code> attribute.</p>
  
  <p>Is that possible to define a named scope in a module and include this module in A, B, and C ?</p>
  
  <p>I tried to do so and got an error message saying that <code>scope</code> is not recognized...</p>