在MVC中敲除远程验证4，允许无效数据保存

Question

您好，我正在使用远程验证和敲除验证规则来检查客户是否与建议日期同时被预订。我终于得到了viewmodel发送数据到控制器验证方法，并且方法确实返回true或false，但是我开始注意到，如果客户端无效，回调并没有阻止用户保存。

我通过交换条件并允许控制器方法返回false，发现了这一点我调试了客户端，发现回调变量实际上是错误的，但我没有收到错误messae，也没有阻止m从保存那次约会。

我的问题是我错过了一段代码，允许这个或有一个错误，我错过了？

视图模型规则验证：

ko.validation.rules['validateClientasync'] = { 
    async: true, 
    message: 'Client is already booked in at this time!', 
    validator: function (val, parms, callback) { 
     var defaults = { 
      url: '/Appointments/CheckClient/', 
      type: 'POST', 
      contentType: 'application/x-www-form-urlencoded', 
      success: function (data) { 
       callback(/* true or false depending on what you get back in data */); 
      } 
     }; 


     if (parms.data != undefined && parms.data.appointment != undefined) { 

      var appointment = ko.toJS(parms.data.appointment); 


      $.ajax({ 
       url: '/Appointments/CheckClient/', 
       type: 'post', 
       contentType: 'application/x-www-form-urlencoded', 
       data: ko.toJS(parms.data.appointment), 
       success: function(data) { 
        callback(/* true or false depending on what you get back in data */); 
       } 
      }); 
     } 


    } 
}; 
ko.validation.registerExtenders(); 

self.appointment = { 
    id: appointment.id, 
    start: ko.observable(appointment.start), 
    end: ko.observable(appointment.end), 
    text: ko.observable(appointment.text), 
    clientid: ko.observable(appointment.clientid).extend({ 
     validateClientasync: { 
      data: self 
     } 
    }), 
    employeeid: ko.observable(appointment.employeeid), 
    roomid: ko.observable(appointment.roomid), 
    fee: ko.observable(appointment.fee).extend({min: 10}) 
}; 

Answer 1

根据https://github.com/Knockout-Contrib/Knockout-Validation/wiki/Async-Rules的定义，只是把一个JSON会有足够的，如：

callback(
{ 
    isValid: true //true or false with json format returned from the validation method in your controller, 
    message: "your cusotm error message here" 
} 
);