Mongodb 更新Mongo对象中的所有嵌套数组

我的数据结构是：

{
  "_id": { "$oid" : "511D0A0EC075F3FF25000003" },
  "progresses": [
    {
      "behavior": {
        "behavior": {
          "_id": "511d052f52fbf0fd25000002",
          "disabled": false,
          "name": "Unity Installed",
          "key": "UnityInstalled",
          "points": 1,
          "timeout": 0
        },
        "key": "UnityNotInstalled",
        "name": "Unity Not Installed",
        "points": 1,
        "timeout": 0,
        "disabled": false,
        "_id": { "$oid" : "511D056552FBF0FD25000003" }
      },
      "behaviorCount": 1,
      "behaviorParameter": null,
      "userId": null,
      "modifiedAt": { "$date": 1360857614000.000000 },
      "createdAt": { "$date": 1360857614000.000000 },
      "behaviorType": "user"
    },
    {
      "behavior": {
        "behavior": {
          "_id": "511cfac4955737a01f000001",
          "disabled": false,
          "name": "test",
          "key": "tt",
          "points": 1,
          "timeout": 0
        },
        "name": "Unity Installed",
        "key": "UnityInstalled",
        "points": 1,
        "timeout": 0,
        "disabled": false,
        "_id": { "$oid" : "511D052F52FBF0FD25000002" }
      },
      "behaviorCount": 3,
      "behaviorParameter": null,
      "userId": null,
      "modifiedAt": { "$date": 1360858565000.000000 },
      "createdAt": { "$date": 1360858553000.000000 },
      "behaviorType": "user"
    },
    {
      "behavior": {
        "behavior": {
          "_id": "511d052f52fbf0fd25000002",
          "disabled": false,
          "name": "Unity Installed",
          "key": "UnityInstalled",
          "points": 1,
          "timeout": 0
        },
        "name": "Active User",
        "key": "ActiveUser",
        "points": 1,
        "timeout": 0,
        "disabled": false,
        "_id": { "$oid" : "511D058E52FBF0FD25000004" }
      },
      "behaviorCount": 1,
      "behaviorParameter": null,
      "userId": null,
      "modifiedAt": { "$date": 1360858565000.000000 },
      "createdAt": { "$date": 1360858565000.000000 },
      "behaviorType": "user"
    },
    {
      "behavior": {
        "behavior": {
          "_id": "511d058e52fbf0fd25000004",
          "disabled": false,
          "name": "Active User",
          "key": "ActiveUser",
          "points": 1,
          "timeout": 0
        },
        "name": "Invite Count",
        "key": "InviteCount",
        "points": 1,
        "timeout": 0,
        "disabled": false,
        "_id": { "$oid" : "511D061752FBF0FD25000006" }
      },
      "behaviorCount": 1,
      "behaviorParameter": null,
      "userId": null,
      "modifiedAt": { "$date": 1360858587000.000000 },
      "createdAt": { "$date": 1360858587000.000000 },
      "behaviorType": "user"
    }
  ],
  "trophyAchievements": [

  ],
  "userId": "asfasd"
}

我要将所有Progress.behaviorCount更新为1。我怎样才能做到这一点呢？

你应该使用mongo和dot符号

在您的情况下，我会像这样使用smth：

db.test.update({}, {$set: {"progresses.$.behaviorCount": "testing"}}, { multi: true })

但是，它不会更新嵌套数组中的所有字段，一次只更新一个字段

参见类似问题：

作为一种解决方法，您可以循环嵌套数组，并通过索引一次更新一个

behaviorCount

---

希望有帮助。

此脚本就是答案：

var i = 0;
db.users.find().forEach(function(doc) {
    doc.progresses.forEach(function(progress) {
        progress.behaviorCount = 1;
    });

    db.users.save(doc);
    if (i % 10000 == 0) print(i);
    i++;
});

输出：users.find（…）.forEach不是函数