无法从js对象中删除键值对

Question

我正在接收一个来自mongodb query的js对象，我想使用delete optr从对象中删除一个键值对，但没有删除，isFollowing值也没有设置，但if part中的代码运行成功。(使用nodeJS)

我已经尝试使用delete选项来删除...然而，它适用于未定义的，但我设置为isFollowing的值不会反映在object中。

baseData.numFollowers = baseData.followers.length;
    baseData.numFollowing = baseData.following.length;    
    if(forWhom === 'self'){
        delete baseData.following;
        delete baseData.followers;
    }else 
    if(forWhom === 'other'){
        const selfUID = req.body.self_id;
        baseData.isFollowing = baseData.followers.includes(selfUID);
        delete baseData.followers;
        delete baseData.following;

    }

    let toSend = {success:true, basic:baseData};

正在获取结果：

{ 
  following: [],
  followers: [],
  numFollowers: 0,
  numFollowing: 0
 }

预期结果：

{
  numFollowers: 0,
  numFollowing: 0,
  isFollowing: true (or false)
}

Answer 1

要使用delete，您需要通过调用toObject将模型文档转换为普通的JavaScript对象，这样您就可以像这样自由地操作它：

const base = baseData.toObject();

base.numFollowers = base.followers.length;
    base.numFollowing = base.following.length;    
    if(forWhom === 'self'){
        delete base.following;
        delete base.followers;
    }else 
    if(forWhom === 'other'){
        const selfUID = req.body.self_id;
        base.isFollowing = base.followers.includes(selfUID);
        delete base.followers;
        delete base.following;

    }

    let toSend = {success:true, basic:base};