solving problem with chat emails

sails/src/api/controllers/MessageController.js

@@ -42,10 +42,10 @@ module.exports = {
       return ([Promise.resolve(msg), StuSup.find({id_stu: params.id_stu}).populate('supervisor')]);
     })
     .spread((msg, stusups) => {
-      var emails = "";
+      var emails = [];
       for (var i=0; i<stusups.length; i++) {
         if (stusups[i].supervisor.id !== params.id_sup)
-          emails = emails + " " + stusups[i].supervisor.email;
+          emails.append(stusups[i].supervisor.email);
       }
 
       // Email body
@@ -68,10 +68,12 @@ module.exports = {
         locale: msg.supervisor.lang || 'es-es'
       });
 
+      sails.log.debug("Sending chat notification on student " + msg.student.id + " to " + emails.join());
+
       // Send Emails
       mailService.mailer()
       .send({
-        to: emails,
+        to: emails.join(),
         text: message,
         subject: subject
       })