title: Spring Mongodb bi-directional dbref
body: <p>Is it possible to have bi-directional dbref in mongodb (like what we can have in relational database, bi-directional one-to-many relationship). If possible how this can be represented in Mongodb and also using Spring-mongodb. The exact scenario I facing is as below</p>
  
  <p>Let's say we would like to build a forum. Forum can have multiple forum topics. Each topic can posts but post should be tagged with one forum topic. There is a one-to-many relationship between forum --> topics and Topic --> posts, also there is relationship from posts --> forum topic. Given the situation how this can be handled using Spring-mongodb.</p>