遍历和过滤Express和Mongoose中的数据 [英] Looping through and filtering the data in express and mongoose

问题描述

我有一个使用Node.js，Express和Mongoose的后端.我试图过滤嵌套在对象深处的文档数组，但是由于某种原因我无法访问该数组.路由 req 包含已登录用户的附加文档.以下是mycode.

I have a backend with Node.js, Express and Mongoose. I am trying to filter an array of documents that is nested deep in an object but I am not able to access the array for some reason. The route req has an attached document of the user who is logged in. Below is mycode.

router.post("/users/:id/accept", auth, async (req, res) => { 
  try {
    // this filter is not working
    await req.user.friendRequests.filter((usr) => usr.owner !== req.params.id);
    await req.user.save();
    res.send("Accepted")
  } catch (error) {
    res.status(400).send(error.message);
  }
});

如果我 console.log(req.user)，我得到:

{
  dateOfBirth: { date: 28, month: 'Sep', year: 2002 },
  gender: 'male',
  cover: null,
  _id: 5f71c0674a54b03e70fcbe97,
  firstName: 'jake',
  lastName: 'sulli',
  email: '[e-mail]',
  friendRequests: [
      _id: 5f71c1184a54b03e70fcbea0,
      owner: '5f71c0d14a54b03e70fcbe9b',
      friend: false,
      name: 'mad max'
    },
    {
      _id: 5f76a7872b21c8208f3caa5f,
      owner: '5f742182931ab9125bc2ec9d',
      friend: false,
      name: 'shriya rai'
    },
    {
      _id: 5f76f6fa85e74758e76cb1ec,
      owner: '5f76f541ab7a1255dc78987d',
      friend: false,
      name: 'dara singh'
    }
  ],
}

如果我 console.log()，我将无法获取 friendRequests 数组，但是我可以获取 name ， email和 gender .我要实现的是，如果 friendRequests.owner === req.params.id ，那么我想从数组中删除该对象.

I am not able to get the friendRequests array if I console.log() but I can get name, email, and gender. What I want to achieve is, if the friendRequests.owner === req.params.id then I want to remove that object from the array.

推荐答案

您的 friendRequests 数组存在一些问题.

There are a few issue with your friendRequests array.

首先，您没有正确开始或结束对象.

First you didn't begin or end your object correctly.

friendRequests: [ 
    {        <=========================== Need another bracket 
      _id: 5f71c1184a54b03e70fcbea0,
      owner: '5f71c0d14a54b03e70fcbe9b',
      friend: false,
      name: 'mad max'
    },
    {
      _id: 5f76a7872b21c8208f3caa5f,
      owner: '5f742182931ab9125bc2ec9d',
      friend: false,
      name: 'shriya rai'
    },
    {
      _id: 5f76f6fa85e74758e76cb1ec,
      owner: '5f76f541ab7a1255dc78987d',
      friend: false,
      name: 'dara singh'
    }
  ]

第二，确保将_id转换为字符串

Second make sure you make those _id into string

5f76f6fa85e74758e76cb1ec to "5f76f6fa85e74758e76cb1ec"

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