Reference Author from Post Document

MongoDB

Technical Specification

Design blog posts collection where each post stores a reference (userId) to the author in users collection.

Input/Output Samples

Input:New post

Output:{ title, body, userId:ObjectId, createdAt }

Optimal Logic Path

db.posts.insertOne({
  title: "My first blog",
  body: "Content here...",
  userId: ObjectId("60a7..."),
  createdAt: new Date(),
});

// index for userId
db.posts.createIndex({ userId: 1 });

Architectural Deep-Dive

Referencing keeps collections separate but connected via IDs, useful when author data is reused widely.