project.js

import {computedFrom} from 'aurelia-framework';
import {Container} from 'aurelia-dependency-injection';
import {ensure} from 'aurelia-validation';
import {Validation} from 'aurelia-validation';


export class Project {
    @ensure(function(it) { it.isNotEmpty().hasLengthBetween(3, 100) })
    _title = null;
    @ensure(function(it) { it.isNotEmpty().hasLengthBetween(5, 300) })
    _overview = null;

    constructor(data) {
        this._id = data.id;
        this._user = data.user;
        this._title = data.title;
        this._overview = data.overview;

        let validation = Container.instance.get(Validation);
        this.validation = validation.on(this);

        this._data = data;
    }

    @computedFrom('_likeCount')
    get likeCount() {
        return this._likeCount;
    }
}