异步等待中的错误处理 [英] Error handling in async await

问题描述

如何为Mongoose(当前版本v5.1.5)实施错误处理?

How can you implement error handling for Mongoose (current version v5.1.5)?

例如，让我们假设下面的代码正在查找用户详细信息.

For example, let's assume the following code where a user detail is being looked up.

let u = await user.find({ code: id }).lean();
return u;

发生一些错误，应该如何处理?

And some error occurs, how should it be handled?

第二，我们能否拥有集中的错误处理功能，该功能将在任何Mongoose代码中发生错误时触发，并将其定向到项目中可以处理的特定功能.

Secondly, can we have centralised error handling function which will get triggered whenever an error happens in any of the Mongoose code, it gets directed to a particular function in the project where it can be handled.

推荐答案

在异步等待的.catch方法中您将得到错误

You will get error in .catch method of async await

假设您有一个函数

handleErrors(req, res, err) {
  return res.json({
    success: false,
    message: err,
    data: null
  })
}

这是您的查询

try {
  let u = await user.find({ code: id }).lean();
  return u;
} catch(err) {
  handleErrors(req, res, err)  //You will get error here
}

您可以检查这里了解更多

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