基本捕获块中未处理的承诺拒绝答案

【问题标题】：Unhandle promise rejection in a basic catch block基本捕获块中未处理的承诺拒绝
【发布时间】：2020-10-06 09:35:02
【问题描述】：

我试图从一个函数向另一个函数抛出一个错误并发送一个 res.status(402)。我以最基本的方式将其放入 try-catch 块中，但仍然出现错误。

：未处理的承诺拒绝。此错误源于抛出在没有 catch 块的异步函数内部

这是调用函数：

const validateAction = async (req, res) => {
  const { action, url, mail, orderId } = req.body;
       try {
        requestAction(action, url, mail, orderId);
      } catch (err) {
        console.error(err);
        res.status(402).send({
          status: 402,
          error: "BUG",
        });
      }

这是我想要抛出错误的函数：

const requestAction = async (action, url, mail, oderId) => {
  const result = actions.find((actionFind) => actionFind.action === action);
  await axios({
    //change the action to "add"
    method: "post",
    url: "XXXXXXXXXXXXXXXXXXXX",
    data: {
      key: "XXXXXXXXXXXXXXXXXXXXXXXX",
      action: "XXXXX",
      service: XXXXXX,
      quantity: XXXXXXXXXX,
    },
  }).then(
    (response) => {
      if (response.data.error) {
        sendLog(
          ` ${response.data.error} --- URL:${url}   ACTION:${action}   QUANTITY:${result.quantity}   ID:${result.id}`,
          "error"
        );
        // here is the throw that's not working---------------------------------------------
        throw response.data.error;
        //----------------------------------------------------------------------------------
      } else {
        sendMail(mail);
        sendLog(
          ` Succesfully sent it --- URL:${url}   ACTION:${action}   QUANTITY:${result.quantity}   ID:${result.id} To ${mail}`,
          "info"
        );
      }
    },
    (error) => {}
  );
};

我相信答案并不复杂但我没找到

【问题讨论】：

await requestAction(action, url, mail, orderId);.
你可能想要 -> await requestAction(
是的基本而简单。我的坏..

标签： javascript node.js error-handling

【解决方案1】：

你需要在promise链中添加一个额外的catch，例如这样：

const validateAction = async (req, res) => {
  const { action, url, mail, orderId } = req.body;
  requestAction(action, url, mail, orderId);
}
   

const requestAction = async (action, url, mail, oderId) => {
  const result = actions.find((actionFind) => actionFind.action === action);
  await axios({
    //change the action to "add"
    method: "post",
    url: "XXXXXXXXXXXXXXXXXXXX",
    data: {
      key: "XXXXXXXXXXXXXXXXXXXXXXXX",
      action: "XXXXX",
      service: XXXXXX,
      quantity: XXXXXXXXXX,
    },
  }).then(
    (response) => {
      if (response.data.error) {
        sendLog(
          ` ${response.data.error} --- URL:${url}   ACTION:${action}   QUANTITY:${result.quantity}   ID:${result.id}`,
          "error"
        );

        throw response.data.error;

      } else {
        sendMail(mail);
        sendLog(
          ` Succesfully sent it --- URL:${url}   ACTION:${action}   QUANTITY:${result.quantity}   ID:${result.id} To ${mail}`,
          "info"
        );
      }
    }).catch(() => {
       console.error(err);
        res.status(402).send({
          status: 402,
          error: "BUG",
        });
   });
};

【讨论】：

【解决方案2】：

基本上需要加一个

等待所以等待 requestAction(action, url, mail, orderId);

在请求操作调用之前。感谢菲利克斯·克林

【讨论】：