MongoDB relationships: embed or reference?

Question

I\'m new to MongoDB--coming from a relational database background. I want to design a question structure with some comments, but I don\'t know which relationship to use for

Answer 1

Well, I'm a bit late but still would like to share my way of schema creation.

I have schemas for everything that can be described by a word, like you would do it in the classical OOP.

E.G.

• Comment
• Account
• User
• Blogpost
• ...

Every schema can be saved as a Document or Subdocument, so I declare this for each schema.

Document:

• Can be used as a reference. (E.g. the user made a comment -> comment has a "made by" reference to user)
• Is a "Root" in you application. (E.g. the blogpost -> there is a page about the blogpost)

Subdocument:

• Can only be used once / is never a reference. (E.g. Comment is saved in the blogpost)
• Is never a "Root" in you application. (The comment just shows up in the blogpost page but the page is still about the blogpost)