feat: Cachable and date session model.

server/src/models/DateSession.js

@@ -0,0 +1,30 @@
+import moment from 'moment';
+
+export default (Model) => {
+  return class DateSession extends Model {
+
+    static get timestamps() {
+      return ['createdAt', 'updatedAt'];
+    }
+
+    $beforeUpdate(opt, context) {
+      const maybePromise = super.$beforeUpdate(opt, context);
+
+      return Promise.resolve(maybePromise).then(() => {
+        if (DateSession.timestamps[1]) {
+          this[DateSession.timestamps[1]] = moment().format('YYYY/MM/DD HH:mm:ss');
+        }
+      });
+    }
+
+    $beforeInsert(context) {
+      const maybePromise = super.$beforeInsert(context);
+
+      return Promise.resolve(maybePromise).then(() => {
+        if (DateSession.timestamps[0]) {
+          this[DateSession.timestamps[0]] = moment().format('YYYY/MM/DD HH:mm:ss');
+        }
+      });
+    }
+  }
+}