Strategy for sharing and reusing of schema parts in mongoose.js

Question

Suppose, I have two schemas, e.g. for person and company. Both of them should have an address, which consists of a street name, number, zip and city.

What would be the strategy to avoid copying the address properties between the two schema definitions? I read about sub docs, but they seem to be (1) tied to exactly one parent schema, (2) always occur in an array.

Answer 1

Almost too obvious, but this is what I came up with finally:

Define the reusable portions separately, however, contrary to my first thoughts: do not use a Schema here:

var addressSubschema = {
    street: String, number: String, zip: String, city: String
}

Simply include this part in actual schemas:

var personSchema = new mongoose.Schema({
    name: { type: String, required: true },
    title: { type: String },
    address: addressSubschema
});
var companySchema = new mongoose.Schema({
    name: { type: String, required: true },
    addresses: [addressSubschema]
});