use timestamp for filename

Author: omricohen

lib/migrate.js

@@ -810,13 +810,26 @@ module.exports = {
 `;
 
     name = name.replace(' ', '_');
-    let filename = path.join(migrationsDir, revision + ((name != '') ? `-${name}` : '') + '.js');
+    let filename = path.join(migrationsDir, getCurrentYYYYMMDDHHmms() + '-' + revision + ((name != '') ? `-${name}` : '') + '.js');
 
     fs.writeFileSync(filename, template);
 
     return {filename, info};
 };
 
+const getCurrentYYYYMMDDHHmms = function () {
+  const date = new Date();
+  return [
+    date.getUTCFullYear(),
+    format(date.getUTCMonth() + 1),
+    format(date.getUTCDate()),
+    format(date.getUTCHours()),
+    format(date.getUTCMinutes()),
+    format(date.getUTCSeconds())
+  ].join('');
+}
+
+
 const executeMigration = function(queryInterface, filename, pos, cb)
 {
     let mig = require(filename);