solved a pair of issues

sails/src/api/controllers/StudentController.js

@@ -685,7 +685,7 @@ module.exports = {
 	  		// Leave all rooms
 	  		for(var i=0; i<rooms.length; i++){
 	  			sails.sockets.leave(req.socket, rooms[i]);
-	  			sails.log.debug("Unsusbscribe from room " + room[i]);
+	  			sails.log.debug("Unsusbscribe from room " + rooms[i]);
 	  		}
 	  		
 	  		res.json({

sails/src/api/controllers/SupervisorController.js

@@ -199,6 +199,7 @@ module.exports = {
 				// First, let's get the list of students of the supervisor
 				// 
 				function (cb) {
+				    console.log("getting supervisor's students");
 					StuSup.find({supervisor: idSup}).populate('student').exec(function(err, stusups){
 						if (err) return cb(err);
 						if (stusups) {
@@ -224,6 +225,7 @@ module.exports = {
 				// the list of students
 				//
 				function (cb) {
+				    console.log("getting office students");
 					if (req.token.isSupAdmin) {
 						Student.find({office: req.token.office.id }).exec(function(err, students){						
 							if (err) return cb(err);
@@ -231,6 +233,7 @@ module.exports = {
 							var l_stu_id = _.pluck(l_stu, 'id'); // get a list of supervised student ids
 							if (students) {
 								async.eachSeries(students, function(student, next) {
+								    console.log("student " + JSON.stringify(student));
 									if (_.indexOf(l_stu_id, student.id) == -1) { // a new student, let's add it
 										// no supervised
 										student.supervision = 0;
@@ -244,12 +247,13 @@ module.exports = {
 								});
 							} else cb();
 						});
-					}
+					} else cb();
 				},
 				//
 				// Populate students with methods
 				//
 				function (cb) {
+				    console.log("assigning methods");
 					async.eachSeries(l_stu, function(student, next) {
 						VStuLastInstruction.findOne(student.id).exec(function(err, row) {
 							if (err) {
@@ -274,7 +278,8 @@ module.exports = {
 				}
 			],
 			function(err) { // All steps done! return list of students if no error
-				if (err) return json(500, {err: err});
+			    console.log("done!");
+				if (err) return res.json(500, {err: err});
 				return res.json(l_stu);
 			}
 		);