ZCCADDEDB567ABAE643E15DCF0974E503Z：查找父级并更新嵌套的 object

Question

Problem

I have the following object:

[
   {
      "_id":"1",
      "store":"llama.com",
      "items":[
         {
            "_id":"1_1",
            "name":"item1"
         },
         {
            "_id":"1_2",
            "name":"item2"
         }
      ]
   },
   {
      "_id":"2",
      "store":"frog.com",
      "items":[
         {
            "_id":"2_1",
            "name":"item1"
         },
         {
            "_id":"2_2",
            "name":"item2"
         }
      ]
   }
]

In this object, I need to:

1. Find the store;
2. Find an item by _id
3. Update the item's name

Solutions tried

I tried using aggregate but I'm only able to find the object, not modify it:

const ObjectId = mongoose.Types.ObjectId;
const item = await UserModel.aggregate([
  { $unwind: "$items" },
  {
    $match: { store, "items._id": ObjectId("1_1") },
  },
]);

Desired outcome

How can I find an item by store , then find the item child by _id and finally change the name of the found item ?

Thank you in advance!

Answer 1

In the store and items._id you put your variables that you want to search. $set changes the name here.

This works for 1 level nested array. For deeper nested arrays you should go with arrayFiltershttps://docs.mongodb.com/manual/release-notes/3.6/#arrayfilters

const item = await UserModel.findOneAndUpdate(
  {
    store: "some store",
    "items._id": "your id"
  },
  {
    $set: {
      [`items.$.` + variable]: "change your name"
    }
  }
);

Answer 2

See if this works

   const item = await UserModel.findOneAndUpdate({ "store": "storeName", 
                "items._id" : "id" },{$set:{"items.0.name":"itemName"}}, {new: true})