solved several issues

sails/src/api/controllers/TPVController.js

@@ -7,7 +7,7 @@
 
 const moment = require('moment');
 
-//
+//-----------------------------------------------------------------------------
 // RedSys Javascript API
 //
 const cryptojs = require("crypto-js");
@@ -28,7 +28,7 @@ function cipherMerchantKey(order, key) {
 
 function encodeMerchantParams(object) {
   // Base64 encoding of parameters
-  var merchantWordArray = cryptojs.enc.Utf8.parse(JSON.stringify(tpvdata));
+  var merchantWordArray = cryptojs.enc.Utf8.parse(JSON.stringify(object));
   return merchantWordArray.toString(cryptojs.enc.Base64);
 }
 
@@ -43,6 +43,7 @@ function signMerchantParams(params, key) {
   var signature = cryptojs.HmacSHA256(params, key);
   return signature.toString(cryptojs.enc.Base64);
 }
+//-----------------------------------------------------------------------------
 
 //
 // TPV Controller

sails/src/api/models/Student.js

@@ -324,7 +324,7 @@ module.exports = {
         // student is valid
         var supIdx = stuSups.findIndex(x => x.supervisor && x.supervisor.id == id_sup);
         if (supIdx >= 0)
-          return ([stuSups[supIdx].supervisor]); // break then chain
+          return ([stuSups[supIdx].supervisor]); // break "then" chain
         throw new Error("No supervisors related");
       }
 
@@ -337,12 +337,14 @@ module.exports = {
       // filter from the second list those found in the first list
       var sups = so.filter(a => ss.findIndex(b => b.id == a.id) >= 0);
 
-      return ([sups, Supervisor.find(id_sup)]);
-    })
-    .spread((sups, me) => {
-      // The requester is an office, so it has to be appended to the list of valid supervisors
-      sups.push(me[0]);
-      return sups;
+      return Promise.all([sups, Supervisor.find(id_sup)])
+      .then((arr) => {
+        // The requester is an office, so it has to be appended to the list of valid supervisors
+        // arr[0] is sups, arr[1] is the array of found supervisors (just one, the requester)
+        arr[0].push(arr[1][0]);
+        return (arr[0]);
+      })
+      .catch((err) => {throw err});
     })
     .then((sups) => {return callback(null, sups)})
     .catch((err) => {return callback(err, [])});