axiosleo/node-koapp/koapp-model

const { Model } = require('@axiosleo/koapp');

new Model(obj?, rules?, messages?);

Model.create(obj, rules, messages);

const m = new Model({ email: 'not-an-email' });
const v = m.validate({ email: 'required|email' });
if (v.fails()) {
  console.log(v.errors.all()); // { email: ['The email format is invalid.'] }
}

class UserModel extends Model {
  constructor(data) {
    super(data, {
      name: 'required|string',
      email: 'required|email',
      age: 'integer|min:0'
    }, {
      required: 'The :attribute field is required.'
    });
  }
  greet() {
    return `Hi, ${this.name}`;
  }
}
const user = new UserModel(context.body);
// If the body fails validation, HttpError(400, ...) is thrown automatically.

required            - present and non-empty
string              - typeof === 'string'
integer             - integer number (accepts strings that parse)
numeric             - finite number (accepts strings)
boolean             - true/false/0/1/'0'/'1'/'true'/'false'
email               - RFC-style email
url                 - absolute URL
in:a,b,c            - value in enumerated list
not_in:a,b,c        - value not in list
min:N               - string length / number value ≥ N
max:N               - string length / number value ≤ N
between:a,b         - inclusive range
size:N              - exact length / value
regex:/pat/         - matches regex
array               - is an array
alpha               - letters only
alpha_num           - letters or digits
alpha_dash          - letters, digits, _, -
required_if:field,value
required_unless:field,value
confirmed           - pairs with `<field>_confirmation`
date                - parseable date

const address = new Model({
  street: '1 Main St',
  city: 'Springfield'
});
const user = new Model({
  name: 'Alice',
  address
});
console.log(user.toObj());
// { name: 'Alice', address: { street: '1 Main St', city: 'Springfield' } }
console.log(user.properties()); // ['name', 'address']
console.log(user.count());      // 2

router.post('/login', async (context) => {
  Model.create(context.body, {
    email: 'required|email',
    password: 'required|min:8'
  });
  // Reaches here only if validation passes
  const { success } = require('@axiosleo/koapp');
  success({ ok: true });
});