MongoDb Establishes a Class of Concern System Design

  mongodb, question

collections:

Post User Published Articles Table
 Follow concerns
 User user

How to design and list articles published by concerned people? I heard that in does not support indexing.

First find out all the people who are paying attention, and then check the articles of people who are paying attention. MongoDb does not support cross-table joint queries, all of which need programs to implement.