javascript - 为什么不会验证触发错误-backbone.js

Question

为什么验证不会触发错误，因为“fred”应该使验证条件在设置时返回 true？

Person = Backbone.Model.extend({

    initialize: function () {
        console.log('inisialize Person');
        this.bind("change:name", function () {
            console.log(this.get('name') + ' is now the name value')

        });
        this.bind("error", function (model, error) {

            console.log(error);

        });
    },
    defaults: {
        name: '',
        height: ''
    },
    validate: function (attributes, options) {  

        if (attributes.name == "fred") { //why wont this work?

            return "oh no fred is not allowed";
        }

    }

});

//var person = new Person({ name: 'joe', height: '6 feet' });
var person = new Person();
person.set({ name: 'fred', height: '200' });

Answer 1

您的 validate() 在保存时被调用，但在设置属性时不会被调用，除非您明确告诉它这样做。来自 docs :

By default validate is called before save, but can also be called before set if {validate:true} is passed.