我想在响应正文中使用 Throw function 抛出带有状态代码的自定义错误

Question

If I use Throw new Error("User not found"), then it gives in response

{status:false,message:"User Not Found"}

But with status code 500, And I need Status 400 in Postman

custom Error using throw function

but if we use res.status(500).send({ status: false, message: "User not found" })

then it gives status code 400, And I need Status 400 in Postman. So, I need same status code in postman only.This is the problem. Tyler2P and Abin Bala, I followed your code but I am unable to get desired status code in postman status.

Answer 1

You can create a custom error class as below and throw it with appropriate message and httpCode. You can also add more properties. Then you can catch the custom error object using the catch block and get the required values.

class CustomError extends Error {
  name;
  httpCode;
  message;
  
  
  constructor(name,httpCode, message){
    super(message);
    this.name = name;
    this.httpCode = httpCode;
    this.message = message;
  }
}

errorThrowingFunction.js :

//import the custom error class in the module that you //are   going to use it.
errorThrowingFunction = () => {
  const authToken = myCache.get("token");
      
  if (!authToken) {
    throw new CustomError('Error',401,'token missing');
  } else {
    return authToken;
  }
}

index.js :

handler = () => {
  try {
    errorThrowingFunction();
  } catch(error){
    const response = {
      statusCode: error.httpCode,
      body: JSON.Stringify(error.message),
      isBase64Encoded: false,
      //add other headers
    }
    return response;
    //if you are using this in rest service, the use below line
    //return res.status(error.httpCode)send(response);
  }
}