create db model script more informative

scripts/create-update-tables.js

@@ -1 +1,43 @@
-require('../models');
+/*
+ * Copyright (c) 2017 TopCoder, Inc. All rights reserved.
+ */
+'use strict';
+
+/**
+ * Script to sync DB model to dynamodb service.
+ * @author TCSCODER
+ * @version 1.1
+ */
+
+(async () => {
+  try {
+    console.log('Syncing database tables and indexes...');
+    const models = require('../models');
+    for (const key in models) {
+      await pingTable(models[key]);
+    }
+    console.log('Remote tables is up to date.');
+  } catch (e) {
+    console.error(e);
+  }
+})();
+
+/**
+ * Check if the table is exist
+ * @param {Model} model the db model
+ * @returns {Promise} the promise object
+ */
+async function pingTable(model) {
+  return new Promise((resolve, reject) => {
+    if (!(model.scan && typeof model.scan == 'function' && model.scan({}).exec)) {
+      return resolve();
+    }
+    model.scan({id: 0}).exec((err, result) => {
+      if (err) {
+        console.log(`Table is not exists ${err}`);
+        return reject(err);
+      }
+      return resolve();
+    });
+  });
+}