[Backbone.js] Model 기초 예제 소스

<script>
    var Book = Backbone.Model.extend({
        initialize: function () {
            this.on("change", function () {
                // 로그를 남기는 여러가지 방법
                console.log('Model Changed');
                if (this.hasChanged('name')) {
                    console.log('The name has changed');
                }
                if (this.hasChanged('author')) {
                    console.log('The author has changed');
                }
                console.log('Changed attributes: ' + JSON.stringify(this.changed));
            });
        },
 
        defaults: {
            name: 'Book Title',
            author: 'No One'
        }
    });
 
    var thisBook = new Book({name : 'Beginning Backbone', author: 'Chris Jerico'});
    console.log('선언부 : ' + JSON.stringify(thisBook));

    // name attribute의 내용을 바꿈(재정의)
    thisBook.set('name', '바꼈지롱~');
    // year attribute가 없을 경우에는 새로 추가,
    // 기존에 year attribute가 있을 경우에는 재정의
    thisBook.set('year', 2030);
    console.log('year has is ' + thisBook.has('year'));
    console.log(thisBook.attributes);
    // year attribute를 삭제.
    thisBook.unset('year');
    console.log(thisBook.attributes);
 
    // 해당 attribute가 존재하는 경우에는 true를 반환하고,
    // 없으면 false를 반환.
    var hasYear = thisBook.has('year');
    var hasName = thisBook.has('name');
    console.log('year has is ' + hasYear);
    console.log('name has is ' + hasName); 
    // 모델 객체 복사
    var cloneBook = thisBook.clone();
    console.log(cloneBook.attributes);

</script>

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