How do I associate specific documents in a collection in MongoDB-atlas to documents that are stored in a different collection in the same cluster?

Question

I was wondering if it is possible to associate documents that are stored in a collection in mongoDB-ATLAS to a specific document in a different collection in the same cluster.

I am trying to display user-specific data on a web-page when a user logs into an account. So if a user enters data into a survey form in their homepage of my application, it is stored in a separate collection to where the users data is stored. I would like the survey data that a specific user has entered, to display in a table on the specific users homepage, so only they can see their own data they have entered previously. but I am not sure know how to associate the survey data to specific accounts since they are in different collections? Does anyone have any advice? Many thanks in advance.

Answer 1

You can make use of aggregation pipelines to achieve this. Aggeregation pipeline is similar to joins feature in SQL.

Please refer to documentation: https://docs.mongodb.com/manual/core/aggregation-pipeline/index.html