Question

Having problems with my ASP.NET MVC2 project. I’m using Fluent NHibernate as ORM, and I really like it. The problems that I have is with caching(I think). I have for example a JQuery DataTable that is getting data with ajax from the database through a controller. The DataTable lists different stuff from the database, If I remove or add some posts, the data doesent seem to update, even if the calls are getting made and NHibernate does what it is supposed to do(I think).

The data only updates as it should If I rerun the project(programming locally), but sometimes even that doesent work.

Is caching the problem? Is it NHibernate caches or the browser?

Answer 1

If data is updated at the database and not through the application, nHibernate will not know about the data, and when queried for again by a List(), or Load() will not return to the database to acquire the full data set.

Suggestions here are:

• For this testing create some means of
  putting data in the database via
  nHibernate
• Or whilst in a testing
  stage, have the service method that
  is being called by jQuery Clear the
  cache each time, thus forcing
  nHibernate back to the database with
  each request.

This can be done completely using ISession.Clear(), or the known objects could be evicted using Evict().

Not really a go-live option though because it is advantages to have nHibernate caching data.