Question

我在使用mongoose查询mongodb时遇到某些问题，但找不到所需的输出。以下是我正在寻找解决方案的数据。

我试图找到两个参数，一个是位置，第二个是类型

{
    "_id" : ObjectId("5f04dcf8e123292518a863ae"),
    "location" : "Australia",
    "name" : "June Bill",
    "filters" : [ 
        {
            "_id" : ObjectId("5f047efe9fc7ad000f44f990"),
            "name" : "Q1",
            "type" : "Platinum",
            "conditions" : [ 
                {
                    "And" : [ 
                        {
                            "_id" : "objectid",
                            "field" : "location",
                            "value" : "Australia",
                            "operator" : "equal"
                        },
                        {
                            "_id" : "objectid",
                            "field" : "name",
                            "value" : "admin",
                            "operator" : "equal"
                        }
                    ]
                }
            ]
        }, 
        {
            "_id" : ObjectId("5f04d51c0ce40120bbb7dc6e"),
            "name" : "Q2",
            "type" : "Gold",
            "conditions" : [ 
                {
                    "_id" : ObjectId("5f04d51c0ce40120bbb7dc6f"),
                    "field" : "ocation",
                    "value" : "Australia",
                    "operator" : "equal"
                }, 
                {
                    "_id" : ObjectId("5f04d51c0ce40120bbb7dc70"),
                    "field" : "start_date",
                    "value" : "2020-06-01T00 3A00",
                    "operator" : "equal"
                },
            ]
        }
    ],
    "__v" : 0
},

{
    "_id" : ObjectId("5f04dcf8e123292518a863ae"),
    "location" : "Brazil",
    "name" : "June Bill",
    "filters" : [ 
        {
            "_id" : ObjectId("5f047efe9fc7ad000f44f990"),
            "name" : "Q1",
            "type" : "Silver",
            "conditions" : [ 
                {
                    "And" : [ 
                        {
                            "_id" : "objectid",
                            "field" : "location",
                            "value" : "Australia",
                            "operator" : "equal"
                        },
                        {
                            "_id" : "objectid",
                            "field" : "name",
                            "value" : "admin",
                            "operator" : "equal"
                        }
                    ]
                }
            ]
        }, 
        {
            "_id" : ObjectId("5f04d51c0ce40120bbb7dc6e"),
            "name" : "Q2",
            "type" : "Gold",
            "conditions" : [ 
                {
                    "_id" : ObjectId("5f04d51c0ce40120bbb7dc6f"),
                    "field" : "location",
                    "value" : "Australia",
                    "operator" : "equal"
                }, 
                {
                    "_id" : ObjectId("5f04d51c0ce40120bbb7dc70"),
                    "field" : "start_date",
                    "value" : "2020-06-01T00 3A00",
                    "operator" : "equal"
                },
            ]
        }
    ],
    "__v" : 0
}

在这里我尝试用location查找，在filters中查找其type 我该怎么用猫鼬呢？

我尝试过

Model.find({'location': 'Brazil', 'filters':{ "$in" : ["Silver"]} });

但是它没有用，有人可以帮助我取得实际结果吗？

Answer 1

您可以使用.来查询嵌入式文件，或者如果要匹配多个字段，可以使用$elemMatch

db.collection.find({
  "location": "Brazil",
  "filters.type": {
    "$in": [
      "Silver"
    ]
  }
},
{
  "filters.$": 1
})

MongoDB Playground

如果要滤除匹配的结果，可以在投影中使用$ operator

Answer 2

使用这种方式：

db.collection.find({
  "location": "Brazil",
  "filters.type": "Silver"
})

MongoDb Playground

在猫鼬中查找包含多个项目的对象

2 个答案: