title: sequelize error: Unhandled rejection TypeError: expecting an array or an iterable object but got [object Null]
body: <p>I'm trying to use findOne from sequelize in my model, but I'm receiving this error 
  The table that the model is referencing is empty, how to handle this?</p>
  
  <pre><code>Unhandled rejection TypeError: expecting an array or an iterable object but got [object Null]
  </code></pre>
  
  <p>This is my code:</p>
  
  <pre><code>app.get('/test/models', function(req, res) {
  
          var values = { 
              where: { user_id: 7 } 
          };
  
          MercadoLibre.findOne(values)
          .spread(function(err, meli) {
  
              console.log(err);
  
              if (typeof meli !== null) {
                  console.log("undefined");
              } else {
                  console.log(meli);    
              }
  
              res.redirect('/dashboard');
          });
      });
  </code></pre>
  
  <p>How can I fix this?</p>