Question

在我的应用程序中，我试图在mongoose上运行一些自定义验证，我想要的是能够确保来自特定用户的评级不应超过一次，我尝试过几件事，并且代码以正确返回true和false开头，但不会触发错误。这是我的代码

RatingSchema.path('email').validate(function (email) {
  var Rating = mongoose.model('Rating');
  //console.log('i am being validated')
  //console.log('stuff: ' + this.email+ this.item)
  Rating.count({email: this.email, item: this.item},function(err,count){
    if(err){
      console.log(err);
    }
    else{
      if(count===0){
        //console.log(count)
        return true; 
      }
      else {
        //console.log('Count: in else(failing)'+ count)
        return false;
      }
    }    
  }); 
},'Item has been already rated by you')

Answer 1

定义执行异步操作的validator（如Rating.count调用）时，验证器函数需要接受第二个参数，该参数是您调用以提供true或false结果的回调因为你不能只返回异步结果。

RatingSchema.path('email').validate(function (email, respond) {
  var Rating = mongoose.model('Rating');
  Rating.count({email: this.email, item: this.item},function(err,count){
    if(err){
      console.log(err);
    }
    else{
      if(count===0){
        respond(true); 
      }
      else {
        respond(false);
      }
    }    
  });
},'Item has been already rated by you');

Mongoose自定义验证失败

1 个答案: