How do I define relationships in Mongoose schemas?

How do I define relationships in Mongoose schemas?

In Mongoose, you can define relationships using references or embedded documents. Would you like to see examples of both?

Yes, please show me an example of using references.

Sure! You can define a reference by using the 'ref' option in your schema. For example, if you have a 'User' model and a 'Post' model, you can reference the User in the Post schema like this:

const postSchema = new mongoose.Schema({
  title: String,
  content: String,
  author: { type: mongoose.Schema.Types.ObjectId, ref: 'User' }
});

What about embedded documents?

For embedded documents, you can simply define a schema within another schema. For example:

const commentSchema = new mongoose.Schema({
  text: String,
  date: Date
});

const postSchema = new mongoose.Schema({
  title: String,
  content: String,
  comments: [commentSchema]
});

Thanks! How do I populate the referenced data?

You can use the populate method to retrieve the referenced data. For example:

Post.find().populate('author').exec();