title: Best practices regarding per-user settings and predefining options
body: <p>I want to save <strong>settings for my users</strong> and some of them would be one out of a <strong>predefined list</strong>! Using <a href="https://github.com/ledermann/rails-settings" rel="nofollow">https://github.com/ledermann/rails-settings</a> ATM.</p>
  
  <p>The setting for f.e. weight_unit would be out of [:kg, :lb].</p>
  
  <p>I don't really want to hardcode that stuff into controller or view code. </p>
  
  <p>It's kind of a common functionality, so I was wondering: Did anyone come up with some way of abstracting that business into <strong>class constants</strong> or the <strong>database</strong> in a DRY fashion?</p>