如何从猫鼬中的对象数组中删除对象

Question

I have notes nested in userSchema I am trying to delete one object by _id but deleteOne is removing the whole user object so how can I can delete the one with _id

const keeperSchema = mongoose.Schema({
    noteName:String,
    noteContent:String,
    })

const userSchema = mongoose.Schema({
    email:String,
    password:String,
    notes:[keeperSchema]
    })

app.post("/delete",(req,res)=>{
    const id=req.body.id
    const email=req.body.email
    console.log(id)

    Keeper.deleteOne({"notes._id":id}).then(()=>{               
        Keeper.find({email:email},(err,results)=>{
            if(results){
                console.log(results)
           }
        })
    })

   })

Answer 1

你可以这样做：

  userModel.updateOne({_id: idofUser}, {$pull: {notes: {_id: idofnote}}})

你应该查询你的 userModel，因为你想从存储在 user 中的 keeper 数组中提取一个元素，所以你必须确定要从哪个用户那里删除你的笔记，这就是为什么你需要有用户的ID。如果您想从所有用户中删除特定的注释，只需像这样清除您的条件：

  userModel.updateMany({}, {$pull: {notes: {_id: idofnote}}})

如何从猫鼬中的对象数组中删除对象

how to delete object from the array of objects in mongoose

mongoose