Ember Changeset CP Validations

Ember CP Validations support for Ember Changeset

Requirements

• ember-cp-validations v3.1.0 or above
• ember-changeset

Installation

ember install ember-changeset-cp-validations

Helpful Links

• Changelog

Looking for help?

If it is a bug please open an issue on GitHub.

Usage

The Template Helper

This addon updates the changeset helper by creating a changeset instance via the createChangeset.

{{dummy-form
    changeset=(changeset user)
    submit=(action "submit")
    rollback=(action "rollback")
}}

Passing a custom action as a second argument to the changeset helper is supported but make sure to call the passed validate method to run the necessary validations.

{{dummy-form
    changeset=(changeset user (action "customValidate"))
    submit=(action "submit")
    rollback=(action "rollback")
}}

import Ember from 'ember';

const { Component } = Ember;

export default Component.extend({
  actions: {
    customValidate({ key, newValue, oldValue, changes }, validate) {
      // do some custom stuff

      return validate(...arguments);
    }
  }
});

Creating a Changeset

There are 2 ways to create a changset programmatically.

Using createChangeset

createChangeset is a no fuss way of quickly creating a new changeset instance. It will return a new changeset instance that is setup for the passed model and its validations.

import Ember from 'ember';
import createChangeset from 'ember-changeset-cp-validations';

const { Component } = Ember;

export default Component.extend({
  init() {
    this._super(...arguments);

    let model = get(this, 'model');
    this.changeset = createChangeset(model);
  }
});

Using buildChangeset

buildChangeset allows you more freedom with creating the changeset instance. It will return a hash that includes the validateFn and validationMap required to support the validations for the passed model.

import Ember from 'ember';
import { buildChangeset } from 'ember-changeset-cp-validations';

const { Component } = Ember;

export default Component.extend({
  init() {
    this._super(...arguments);

    let model = get(this, 'model');
    let { validateFn, validationMap } = buildChangeset(model);
    this.changeset = new Changeset(model, validateFn, validationMap);
  }
});

Disable CP Validations Dependents

When changes get applied to the actual model, validations will be re-triggered since the dependents of the CPs have changed. As of ember-cp-validations v3.1.0, to disable this, you may put all or selective attribute CPs in a volatile state via the volatile option.

const Validations = buildValidations({
  username: {
    description: 'Username',
    validators: [
      validator('presence', true),
      validator('length', {
        min: 5,
        max: 15
      })
    ]
  },

  password: {
    description: 'Password',
    validators: [
      validator('presence', true),
      validator('length', {
        min: 4,
        max: 10,
        volatile: false
      })
    ]
  }
}, {
  volatile: true
});