Mongoose: extending schemas

Question

Currently I have two almost identical schemas:

var userSchema = mongoose.Schema({

    email: {type: String, unique: true, required: true, validate: emailVal         


        

Answer 1

All of these answers seem rather needlessly complicated, with extension helper functions or extend methods applied to the schema's or using plugins/discriminators. I've used the following solution instead which is simple, clean and easy to work with. It defines a blueprint for the base schema, and then the actual schema's are built using the blueprint:

foo.blueprint.js

module.exports = {
  schema: {
    foo: String,
    bar: Number,
  },
  methods: {
    fooBar() {
      return 42;
    },
  }
};

foo.schema.js

const {schema, methods} = require('./foo.blueprint');
const {Schema} = require('mongoose');
const FooSchema = new Schema(foo);
Object.assign(FooSchema.methods, methods);
module.exports = FooSchema;

bar.schema.js

const {schema, methods} = require('./foo.blueprint');
const {Schema} = require('mongoose');
const BarSchema = new Schema(Object.assign({}, schema, {
  bar: String,
  baz: Boolean,
}));
Object.assign(BarSchema.methods, methods);
module.exports = BarSchema;

You can use the blueprint for the original schema as is, and using Object.assign you can extend the blueprint in any way you like for other schema's, without modifying the same object.