Delete populate, not necessary

sails/src/api/controllers/SceneController.js

@@ -60,7 +60,7 @@ module.exports = {
               });
             }
           }).catch(function(err){
-            return res.serverError("Could not find active_scene");
+            throw new Error("Could not find active_scene, maybe there is not an active scene yet");
           });
         }
         Scene.findOne({ id: params.id }).then(function (scene) {
@@ -130,8 +130,7 @@ module.exports = {
     getScene: function(req, res){
       if (typeof req.params.id == 'undefined' || !req.params.id)
         return res.badRequest("scene id not defined");
-        Scene.findOne({id: req.params.id})
-        .populate('stuPictos').then(function(scene){
+        Scene.findOne({id: req.params.id}).then(function(scene){
           if(!scene){
             return res.badRequest();
           }

sails/src/api/controllers/StudentController.js

@@ -827,7 +827,6 @@ module.exports = {
       if (typeof req.params.id_stu == 'undefined' || !req.params.id_stu)
         return res.badRequest("id_stu not defined");
       Scene.findOne({student: req.params.id_stu, active: true})
-      .populate('stuPictos')
       .then(function(scene){
           if(!scene)
               return res.badRequest("Scene not found");