How to handle many to many relationships in mongodb?

@haylee.mertz 

In MongoDB, many-to-many relationships can be handled using the following methods:

1. Embedding: You can embed arrays of object IDs within documents to represent many-to-many relationships. For example, if you have users and roles, you can embed an array of role IDs within each user document to indicate which roles the user has.
2. Referencing: You can use the referencing approach where you store references to related documents in an array within each document. For example, you can store the IDs of users in an array within each role document to indicate which users have that role.
3. Using a junction collection: You can create a separate collection to represent the relationship between two entities. This collection stores the IDs of both entities and any additional information about the relationship. For example, you can create a collection called "user_roles" that stores the IDs of users and roles along with the level of access each user has for that role.
4. Using database triggers: You can leverage triggers to automatically update related documents when one document is modified. This can help maintain data integrity and consistency in many-to-many relationships.

When working with many-to-many relationships in MongoDB, it's important to carefully consider the needs of your application and choose the most appropriate method based on factors such as data access patterns, query performance, and scalability requirements.