fixing issue with therapist related students

sails/src/api/models/Student.js

@@ -305,8 +305,15 @@ module.exports = {
     })
     .spread((stuSups, supOffs) => {
 
-      if (!supOffs || supOffs.length == 0)
-        throw new Error("No supervisors");
+      if (!supOffs || supOffs.length == 0) {
+        // if we get here, only the requester being directly related to the
+        // student is valid
+        var supIdx = stuSups.findIndex(x => x.supervisor.id == id_sup);
+        if (supIdx >= 0)
+          return callback(null, [stuSups[supIdx].supervisor]);
+        throw new Error("No supervisors related");
+      }
+
 
       // filter null entries and map them to the supervisor object
       var ss = _.compact(_.compact(stuSups).map(x => x.supervisor));