Incorrect (using Mirage with ORM complexity):

// mirage/config.js
export default function () {
  this.namespace = '/api';

  // Complex schema and factories
  this.get('/users', (schema) => {
    return schema.users.all();
  });

  // Need to maintain schema, factories, serializers
  this.post('/users', (schema, request) => {
    let attrs = JSON.parse(request.requestBody);
    return schema.users.create(attrs);
  });
}