雙重嵌套數組

我有一個蒙戈集合，看起來像這樣雙重嵌套數組

db.users.find().pretty() 
{ 
    "_id" : ObjectId("57c3d5b3d364e624b4470dfb"), 
    "fullname" : "tim", 
    "username" : "tim", 
    "email" : "[email protected]", 
    "password" : "$2a$10$.Z9CnK4oKrC/CujDKxT6YutohQkHbAANUoAHTXQp.73KfYWrm5dY2", 
    "workout" : [ 
     { 
      "workoutId" : "Bkb6HIWs", 
      "workoutname" : "chest day", 
      "BodyTarget" : "Chest", 
      "date" : "Monday, August 29th, 2016, 2:27:04 AM", 
      "exercises" : [ 
       { 
        "exerciseId" : "Bym88LZi", 
        "exercise" : "bench press", 
        "date" : "Monday, August 29th, 2016, 2:29:30 AM" 
       }, 
       { 
        "exerciseId" : "ByU8II-s", 
        "exercise" : "flys", 
        "date" : "Monday, August 29th, 2016, 2:29:34 AM" 
       } 
      ] 
     }, 
     { 
      "workoutId" : "Bk_TrI-o", 
      "workoutname" : "Back day", 
      "BodyTarget" : "Back", 
      "date" : "Monday, August 29th, 2016, 2:27:12 AM" 
     } 
    ] 
}

內蒙戈更新所以我最終還是希望它看起來像這樣

db.users.find().pretty() 
{ 
    "_id" : ObjectId("57c3d5b3d364e624b4470dfb"),`enter code here` 
    "fullname" : "tim", 
    "username" : "tim", 
    "email" : "[email protected]", 
    "password" : "$2a$10$.Z9CnK4oKrC/CujDKxT6YutohQkHbAANUoAHTXQp.73KfYWrm5dY2", 
    "workout" : [ 
     { 
      "workoutId" : "Bkb6HIWs", 
      "workoutname" : "chest day", 
      "BodyTarget" : "Chest", 
      "date" : "Monday, August 29th, 2016, 2:27:04 AM", 
      "exercises" : [ 
       { 
        "exerciseId" : "Bym88LZi", 
        "exercise" : "bench press", 
        "date" : "Monday, August 29th, 2016, 2:29:30 AM", 
        "stats" : [ 
          { 
          "reps: '5', 
          "weight":'105' 
          } 
       }, 
       { 
        "exerciseId" : "ByU8II-s", 
        "exercise" : "flys", 
        "date" : "Monday, August 29th, 2016, 2:29:34 AM" 
       } 
      ] 
     }, 
     { 
      "workoutId" : "Bk_TrI-o", 
      "workoutname" : "Back day", 
      "BodyTarget" : "Back", 
      "date" : "Monday, August 29th, 2016, 2:27:12 AM" 
     } 
    ] 
}

我想補充的統計數據陣列到當前的練習數組。我有一個雙重嵌套數組

點符號麻煩我想這

db.users.update({ 
    'email': '[email protected]', "workout.workoutId": "Bkb6HIWs" ,"workout.exercises.exerciseId":"ByU8II-s" 
}, 
{ 
    $push: { 
      "workout.0.exercises.$.stats": {"sets":"sets", "reps":"reps"}}})

哪些實際工作，卻總是推到第一嵌套的練習對象。

現在如果我這樣做...

db.users.update({ 
    'email': '[email protected]', "workout.workoutId": "Bkb6HIWs" ,"workout.exercises.exerciseId":"ByU8II-s" 
}, 
{ 
    $push: { 
      "workout.0.exercises.1.stats": {"sets":"sets", "reps":"reps"}}})

和替換用1 $它會推到第二演習陣列這顯然是我想要的。但我正在建立一個網站，所以我不能明確地硬編碼。我需要使用$，但它似乎並沒有讓它通過第一個練習對象。

任何幫助，我將不勝感激！

來源

2016-08-29 Jeffrey Yourman

'$'表示第一個。 mongo應該知道你想更新哪個索引？查詢只是說出要找的東西。我認爲你需要找到文檔，在服務器中更新並保存。 –

如果鍛鍊次數增加沒有任何界限，您可能需要重新考慮您的模式設計，因爲文檔在某個時間點可能會超過16MB的大小限制。 –

db.users.update({ 
    'email': '[email protected]', 
    "workout.workoutId": "Bkb6HIWs", 
    "workout.exercises.exerciseId":"ByU8II-s" 
},

該查詢部分返回第一個匹配對象，它是整個用戶配置文件而不是練習條目。所以你可以指定電子郵件來獲得相同的對象。「workoutId」和「exerciseId」是多餘的。

{ 
    $push: { 
    "workout.0.exercises.$.stats": {"sets":"sets", "reps":"reps"} 
    } 
})

因此，這個推送命令將只會推入像Amiram在評論中說的練習的第一個條目。在這種情況下，您可以檢索整個對象，對其進行修改，然後保存。

但我想你可能需要重新設計你的模式以獲得更好的性能。也許制定鍛鍊和鍛鍊的模式，然後使用參考來連接它們。 http://mongoosejs.com/docs/populate.html

來源

2016-08-30 03:49:53

雙重嵌套數組

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