Question

我的错误消息如下所示：

var data = 
{"message":"An error has occurred.",
 "exceptionMessage":"An error occurred while updating the entries. See the inner exception for details.",
 "exceptionType":"System.Data.Entity.Infrastructure.DbUpdateException",
 "innerException":{
    "message":"An error has occurred.",
    "exceptionMessage":"An error occurred while updating the entries. See the inner exception for details.",
    "exceptionType":"System.Data.Entity.Core.UpdateException",
    "innerException":{
         "message":"An error has occurred.",
         "exceptionMessage":"Message 1"}
  }
}

或

var data = 
{"message":"An error has occurred.",
 "exceptionMessage":"An error occurred while updating the entries. See the inner exception for details.",
 "exceptionType":"System.Data.Entity.Infrastructure.DbUpdateException",
 "innerException":{
    "message":"An error has occurred.",
    "exceptionMessage":"Message 2",
    "exceptionType":"System.Data.Entity.Core.UpdateException",
  }
}

任何人都可以给我一个关于如何从这两个JSON字符串中获取innerException消息的建议。问题是有时只有一个内部异常而另外两个异常。我需要的是从“innerException”

的最内部提取消息的一些方法

Answer 1

只需一个简单的循环即可：

var item = data;
while(item.innerException !== undefined) {
   item = item.innerException;
}
var msg = item.message;

Answer 2

您也可以使用递归解决方案：

function getMostInnerMessage(json) {
    if (json.innerException){
        return getMostInnerMessage(json.innerException);
    }
    else{
        return json.message;
    }
}

Answer 3

轻松使用三行并扩展Object类型：

/**
* Return the last innerException (more down) for ALL objects.
**/
Object.prototype.getInnerException = function(){
    if( typeof this.innerException !== 'undefined' ) // Check if has a innerException
        var innerException = this.innerException.getInnerException(); // Re-call

    // You could throw a Exception if it's the first level and ir hasn't an innerException.

    return innerException || this; // Return the the next innerException or the actual
};

现在，您可以调用Object方法的最后一个innerException（更多关闭）：

//Object {message: "An error has occurred.", exceptionMessage: "Message 1"}
console.log(data.getInnerException());
//Object {message: "An error has occurred.", exceptionMessage: "Message 2", exceptionType: "System.Data.Entity.Core.UpdateException"}
console.log(data2.getInnerException());

请参阅jsfiddle：http://jsfiddle.net/t6j3ecp8/2/

如何使用Javascript从JSON字符串中获取内部异常消息？

3 个答案: