Is it possible to use inheritance in Foxx models?

Question

I am developing a REST API using ArangoDB and Foxx. A pattern that keeps coming back in multiple models is the following:

const NewAccount = Foxx.Model.extend({
schema: {
    name: Joi.string().required(),
    ... multiple properties
}});

When I store the model in the database, I want to add properties like the creation timestamp, the status of the account, ... .

const Account = Foxx.Model.extend({
schema: {
    name: Joi.string().required(),
    ... multiple properties,
    created: Joi.number().integer().required().default(Date.now, 'Current date'),
    status: Joi.number().integer().required()
}});

question: Is there a way to let the Account model inherit all properties from the NewAccount model, so I only have to define the created and status properties?

Secondly, is there an efficient and easy way to copy all properties from a NewAccount instance into an Account instance ?

Answer 1

There's no direct support for extending schemas via inheritance. However schemas are just objects, so you can extend them like any other object, for example using _.extend:

var _ = require('underscore');
var baseAccountSchema = {
  // ...
};
var extendedAccountSchema = _.extend({}, baseAccountSchema, {
  // ...
});
var NewAccount = Foxx.Model.extend({
  schema: baseAccountSchema
});
var Account = Foxx.Model.extend({
  schema: extendedAccountSchema
});