mongodb查詢文檔中所有數組元素的匹配條件？

Question

我正在開發游戲應用程序。

在一種情況下，我需要在子數組（SelectionData）的所有元素中找到所有滿足條件的文檔。

//模型

import mongoose from 'mongoose';
const User_Selection = mongoose.Schema({
    UserSelectionID: { type: String, default: "" },
    SelectionData: [
        {
            _id: false,
            match_id: { type: String, default: "" },
            selected_option: { type: String, default: "" },
            selected_points: { type: Number, default: 0 },
            Whether_Points_Calculated: { type: Boolean, default: false },
            Points_Collected: { type: Number, default: 0 }
        }
    ],
    Opponent_Details: {
        USERID: { type: String, default: "" },
        DisplayName: { type: String, default: "" }
    },
    Whether_Final_Points_Calculated: { type: Boolean, default: false },
    Total_Game_Points: { type: Number, default: 0 },
    Status: { type: Boolean, default: true },
    created_at: { type: Date, default: null },
    updated_at: { type: Date, default: null }
}, { collection: 'User_Selection' });
export default mongoose.model('User_Selection', User_Selection);

我希望在所有數組元素中找到所有滿足條件的文檔（“ SelectionData.Whether_Points_Calculated” == true）。

Answer 1

應該像這樣

const cursor = async() => { 
        return new Promise((resolve, reject) => {
                User_Selection.find({
              SelectionData: { Whether_Points_Calculated: true }
          })
         . then(result => {
               resolve(result) 
         }) 
        . catch(err => {  
              reject(err) 
        }) 
} 

Answer 2

這必須工作：

db.getCollection（'User_Selection'）。find（{“ SelectionData”：{“ $ elemMatch”：{“ Whether_Points_Calculated”：true}}}）

Answer 3

下面的腳本為我工作。

db.collection.find({
  "SelectionData": {
    "$not": {
      "$elemMatch": {
        "Whether_Points_Calculated": {
          "$eq": false
        }
      }
    }
  }
})

游樂場鏈接

Answer 4

db.collection.aggregate([
{"$match":{"cards":{"$exists":true}}},
{$project: {

    "output": {$filter: {

        input: '$cards' ,

        as: 'arrayElement',

        cond: {"$and":[{$eq: ['$$arrayElement.Whether_Points_Calculated', true]}]}

     }}
  }}
])