How to call an attribute from the same model for a validation with ember-cp-validation - validation

Question

is there a way to call an attribute from the same model? Because I want to use an attribute, from model/code.js, to calculate the validator of an other attribute from the same file. I'll show you with example.
//model/code.js
import Ember from 'ember';
import DS from 'ember-data';
import {validator, buildValidations} from 'ember-cp-validations';
const CardValidations = buildValidations(
{
cardId: {
validators: [
validator('presence', true),
validator('length', {
// here instead of 10, I want to use nbBits
max: 10
}
]
}
}
);
export default Credential.extend(CardValidations, {
cardId: DS.attr('string'),
nbBits: DS.attr('number'),
displayIdentifier: Ember.computed.alias('cardId'),
});
So as you can see, I want to call nbBits, to have a specific validation for cardId.
Does somebody know the methods or give me a tips? Thank you for your time

Answer 1

Your case is described in the official documentation of ember-cp-validations as follows:
const Validations = buildValidations({
username: validator('length', {
disabled: Ember.computed.not('model.meta.username.isEnabled'),
min: Ember.computed.readOnly('model.meta.username.minLength'),
max: Ember.computed.readOnly('model.meta.username.maxLength'),
description: Ember.computed(function() {
// CPs have access to the model and attribute
return this.get('model').generateDescription(this.get('attribute'));
}).volatile() // Disable caching and force recompute on every get call
})
});
Your yet simpler case would look like this:
const CardValidations = buildValidations(
{
cardId: {
validators: [
validator('presence', true),
validator('length', {
// here instead of 10, I want to use nbBits
max: Ember.computed.readOnly('model.nbBits')
}
]
}
}
);