How to get the goods?

Question

MongoDB

I'm learning mongo , there are 2 collections : categories and products
In the first category hierarchy.
In the second list of goods.
The question is how to bind a product to a category and how to display all products in a specific category.
As I understand it, there are no Joins here and do you need some other way?

Answer 1

https://mongoosejs.com/docs/populate.html
Read about populate and ref. And don't work with bare mongo, use mongoose.