Changes

config/promise.js

@@ -0,0 +1,36 @@
+'use strict';
+
+const mongoose = require('mongoose');
+
+module.exports = function() {
+  return function(req, res, next) {
+    res.promise = (promise) => {
+      promise
+        .then((data) => {
+          res.json({
+            data
+          });
+        })
+        .catch((error) => {
+          if (typeof error === 'string') {
+            return res.json(400, {
+              error: {
+                message: error
+              }
+            });
+          }
+
+          if (error.name === 'ValidationError') {
+            return res.json(400, {
+              error: error
+            });
+          }
+
+          console.log(error.stack);
+          res.json(500, 'Internal error');
+        });
+    };
+
+    next();
+  };
+};