"如何获取mern堆栈中箭头函数之外的变量值"

Question

我想在函数const custDetail = await registeredUser.findOne(req.params);之外获取此变量的值

const dashboardReq = async (req, res, next) => {
      try {
        const regCust = await registeredUser.findOne({ mobile: req.params.mobile });

    if (regCust == null) {
      console.log("No user found");
    } else {
      const custDetail = await registeredUser.findOne(req.params);
    }
    res.status(201).json({
      status: "success",
      data: { regCust },
    });
  } catch (error) {
    res.status(400).json({
      status: "fail",
      data: next(error),
    });
  }
};

Answer 1

如果我的评论没有意义：

let custDetail;

const dashboardReq = async (req, res, next) => {
      try {
        const regCust = await registeredUser.findOne({ mobile: req.params.mobile });

    if (regCust == null) {
      console.log("No user found");
    } else {
      custDetail = await registeredUser.findOne(req.params);
    }
    res.status(201).json({
      status: "success",
      data: { regCust },
    });
  } catch (error) {
    res.status(400).json({
      status: "fail",
      data: next(error),
    });
  }
};

Answer 2

尝试重新审视您的设计，因为变量 custDetail 需要存在于路线本身内

如果这应该被记住，那么维护一个带有来自 req.params 的一些唯一标识符的映射，其结果来自 registerUser.findOne