骨干验证功能没有得到所谓的 [英] Backbone validate function not getting called

问题描述

我的验证功能是没有得到所谓的下code： -

My validate function is not getting called in the code below:-

var Vehicle = Backbone.Model.extend({
    color: 'green',
    validate: function (attrs) {
        var validColors = ['white', 'red', 'blue', 'yellow'];
        var colorIsValid = function (attrs) {
            if (!attrs.color) return true;
            return _.contains(validColors, attrs.color);
        }
        if(!colorIsValid(attrs)) {
            return "color must be one of: " +validColors.join(",");
        }
    }
});

var car = new Vehicle();

car.on('error', function (model, error) {
    console.log(error);
});

console.log(car.get('color'));
car.set('color', 'muave');

请参阅小提琴
http://jsfiddle.net/vineet85/Fa8jr/5/

谁能告诉我，为什么验证功能是没有得到所谓的？

Can someone tell me why the validate function is not getting called?

推荐答案

在Backbone.js的验证将自动在称为保存而不是在设置。

In Backbone.js validate is called automatically on save but not on set.

如果您想验证到设定值时运行，你需要使用验证选项。例如。

If you want validations to run when setting a value you will need to use the validate option. e.g.

car.set('color', 'muave', {validate: true});

请参阅 http://backbonejs.org/#Model-validate

当错误发生时，通常在服务器上，试图保存对象时，会触发错误事件。请参见 http://backbonejs.org/#Events-catalog

The error event is triggered when an error occurs, typically on the server, when trying to save the object. See http://backbonejs.org/#Events-catalog

如果你想赶上验证失败尝试处理无效事件：

If you want to catch validation failures try handling the invalid event:

car.on('invalid', function (model, error) {
    console.log(error);
});

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