Question

在我的sails.js应用程序模型中，我想从生命周期回调中发送“错误请求”错误代码400。这是我的beforeCreate函数：

beforeCreate: function (values, next) {
    if (!values.email) {
      next();
    } else{
      var err = {
        httpCode: 400,
        message: 'email not defined.'
      };
      return next(err);
    }
  }

不发送400错误，而是发送500错误。这是输出：

error: Sending 500 ("Server Error") response: 
 Error (E_UNKNOWN) :: Encountered an unexpected error
    at new WLError (/app/node_modules/sails/node_modules/waterline/lib/waterline/error/WLError.js:25:15)
    at duckType (/app/node_modules/sails/node_modules/waterline/lib/waterline/error/index.js:66:10)
    at errorify (/app/node_modules/sails/node_modules/waterline/lib/waterline/error/index.js:39:10)
    at wrappedCallback (/app/node_modules/sails/node_modules/waterline/lib/waterline/utils/normalize.js:325:15)
    at callback.error (/app/node_modules/sails/node_modules/waterline/node_modules/switchback/lib/normalize.js:42:31)
    at _switch (/app/node_modules/sails/node_modules/waterline/node_modules/switchback/lib/factory.js:56:28)
    at /app/node_modules/sails/node_modules/waterline/lib/waterline/query/dql/create.js:73:23
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:726:13
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:52:16
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:264:21
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:44:16
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:723:17
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:167:37
    at /app/node_modules/sails/node_modules/waterline/lib/waterline/query/validate.js:73:23
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:726:13
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:52:16
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:264:21
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:44:16
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:723:17
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:167:37
    at /app/node_modules/sails/node_modules/waterline/lib/waterline/query/validate.js:35:27
    at /app/node_modules/sails/node_modules/waterline/node_modules/async/lib/async.js:52:16

Details:  { httpCode: 400, message: 'email not defined.' }

我如何实现目标？

Answer 1

所以你可以看到你收到的错误的最后一行是

详细信息：{httpCode：400，消息：'电子邮件未定义。' }

所以当我们在sails的生命周期回调中发送一个错误对象时，waterline将自己的实现包装在我们发送的错误上

在响应中我们得到一个给定格式的字符串

详细信息：{httpCode：400，消息：'电子邮件未定义。' } //这是字符串

此字符串存在于错误对象

的详细信息属性中

所以

假设你的生命周期回调是

beforeValidate: function(values,cb){
 cb(JSON.stringify({ httpCode: 400,
            code: 997,
            message: 'username already exists',
            context: 'user create',
            custom: true }));
}

尝试对要发送的错误对象进行字符串化

在控制器中，您可以将此错误称为字符串，格式为

详细信息：{您定义的错误对象}

现在在控制器中

//在回调或承诺内容中收到此错误对象

if(error.hasOwnProperty('details')){
                var indexStart=error.details.indexOf('{');
                //this is where we are extracting the error code that we set inside lifecycle callback
                var data =error.details.substring(indexStart);
                res.json(500,JSON.parse(data));
            }else{
                res.json(500,{message : "your message",status : 'your status',data : error});
      }

来自beforeCreate和其他生命周期回调的响应中出现E_UNKNOWN错误

1 个答案: