node.js - 检测 Backbone 模型验证是否存在任何不需要的属性

Question

我实现了这个简单的功能来检测主干模型中任何不需要或未指定的属性:

var Underscore = require( '/usr/local/lib/node_modules/underscore' ),
    Backbone = require( '/usr/local/lib/node_modules/backbone' ),
    Validation = require( '/usr/local/lib/node_modules/backbone-validation' );

Underscore.extend( Backbone.Model.prototype, Validation.mixin );

var User = Backbone.Model.extend( {
   validation: {
        firstname: {
            minLength: 1,
            maxLength: 20,
            required: true
        },
        lastname: {
            minLength: 1,
            maxLength: 20,
            required: true
        }
    }, 
    ...

    isAttributeAccepted: function( attr ) {
        var retval = false;
        for ( var property in this.validation ) {
            if ( attr == property ) {
                retval = true;
                break;
            }
        }
        return retval;
    },
    ...

使用中:

var user = new User();
var isDesired = user.isAttributeAccepted( "nop" );
console.log( isDesired ) // false;

我这样做只是因为我在 Backbone.validation 中找不到任何东西来替代它。我如何用使用 Backbone.validation (github thederson.com) 的首选方式替换此代码？

谢谢。

Answer 1

我还没有在 backbone.validation 中找到方法来执行此操作，但您可以更轻松地编写代码:

    isAttributeAccepted: function(attr) {
        return _.has(this.validation, attr);
    },