title: Mongoose Cast to ObjectId failed for value "xxx" at path "_id"
body: <p>I´m trying to get some files using a restriction where</p>
  
  <pre><code>ShipmentRequest.find()
        .where('estatus').in(['Asignada','Inicio Carga','Fin Carga','En Transito','Entregada'])
        .exec(function(err,solicitudes){
          if(err){
            return res.status(400).json({message:'Error, no se pudieron obtener las solicitudes',error:err});
          }
          else {
            return res.status(200).json(solicitudes);
          }
      });
  </code></pre>
  
  <p>but I get this error</p>
  
  <pre><code>Cast to ObjectId failed for value "estatus" at path "_id"
  </code></pre>
  
  <p>I already used the same "where" restriction at the same collection with no errors so I don't understand why I'm getting it here.</p>