使用聚合排序获取所有记录，其中排序键是数组字段

Question

我正在尝试通过匹配条件获取所有记录，然后希望使用pymongo聚合以排序格式显示结果 这是我的收藏集

[{
    "userId" : "user1",
    "name" : "USER 1",
    "description":"User has mobile no.",
    "contacts" : [ 
        {
            "type" : "home",
            "number" : "1234"
        },
        {
            "type" : "mobile",
            "number" : "3456"
        }
    ],
    "contactTypes" : [ 
        "home", "mobile"
    ]
},
{
    "userId" : "user2",
    "name" : "USER 2",
    "description":"User has office and no mobile number",
    "contacts" : [ 
        {
            "type" : "office",
            "number" : "1111"
        }
    ],
    "contactTypes" : [ 
        "office"
    ]
},
{
    "userId" : "user3",
    "name" : "USER 3",
    "description":"User has office no",
    "contacts" : [ 
        {
            "type" : "home",
            "number" : "1111"
        },
        {
            "type" : "office",
            "number" : "2222"
        }
    ],
    "contactTypes" : [ 
        "home", "office"
    ]
}]

现在，我想检索所有联系人类型为“移动”或描述中包含移动词的文档（这将返回前两个文档），并且还希望按contacts.number排序返回的结果。由于user2的contacts.number为“ 1111”，因此应首先显示如下：

    "userId" : "user2",
    "name" : "USER 2",
    "description":"User has office and no mobile number",
    "contacts" : [ 
        {
            "type" : "office",
            "number" : "1111"
        }
    ],
    "contactTypes" : [ 
        "office"
    ]
},{
    "userId" : "user1",
    "name" : "USER 1",
    "description":"User has mobile no.",
    "contacts" : [ 
        {
            "type" : "home",
            "number" : "1234"
        },
        {
            "type" : "mobile",
            "number" : "3456"
        }
    ],
    "contactTypes" : [ 
        "home", "mobile"
    ]
}]

所以我的查询如下：

db.collection.aggregate(
[
  {
    "$unwind": "contacts"
  },
  {
    "$match": {
      "$or": [
        {
          "description": {
            "$regex": "mobile"
          }
        },
        {
          "contactTypes": {
            "$regex": "mobile"
          }
        }
      ]
    }
  },
  {
    "$sort": {"contacts.number":1}
  }
]
)

但是我遇到类似-“无法使用并行数组的键排序”的错误

不知道我在这里想念的是什么，或者应该如何写上面的查询。