Question

我有一个MongoDB集合，其文档格式如下：

result of MyCollection.find({"_id": "20141029"})

{
    "_id" : "20141029", 
    "portfolio_returns" : [
        {       
            "data" : [
                {
                    "report" : {
                        "open" : {
                            "returns_rs" : 398.8
                        },
                        "both" : {
                            "returns_rs" : 1054.800
                        }
                    },
                    "portfolio" : "Mystocks"
                }
            ],
            "user" : "mzmmohideen@gmail.com"
        },
        {
            "data" : [
                {
                    "report" : {
                        "open" : {
                            "returns_rs" : 5000
                        },
                        "both" : {
                            "returns_rs" : 5500
                        }
                    },
                    "portfolio" : "pff"
                }
            ],
            "user" : "mani@ithoughtz.com"
        }
    ],

'portfolio_stock_gain_or_loss': [
        {
            "data" : [
                {
                    "portfolio" : "gm",
                    "stocks" : [ ]
                }
            ],
            "user" : "moorthy.gm@gmail.com"
        },
        {
            "data" : [
                {
                    "portfolio" : "Mystocks",
                    "stocks" : [
                        {
                            "open" : {
                                "returns_rs" : 9144
                            },
                            "scripcode" : "532540",
                            "both" : {
                                "returns_rs" : 9426.75
                            }
                        },
                        {
                            "open" : {
                                "returns_rs" : 254.80
                            },
                            "scripcode" : "500790",
                            "both" : {
                                "returns_rs" : 254.80
                            }
                        }
                    ]
                }
            ],
            "user" : "mzmmohideen@gmail.com"
        },
        {
            "data" : [
                {
                    "portfolio" : "pff",
                    "stocks" : [
                        {
                            "open" : {
                                "returns_rs" : 4000
                            },
                            "scripcode" : "500790",
                            "both" : {
                                "returns_rs" : 8500
                            }
                        },
                        {
                            "open" : {
                                "returns_rs" : 0
                            },
                            "scripcode" : "533151",
                            "both" : {
                                "returns_rs" : 0
                            }
                        }
                    ]
                }
            ],
            "user" : "mani@ithoughtz.com"
        }
    ]
}

我的问题是如何使用pymongo过滤出来自此文档的数据，其中“portfolio_stock_gain_or_loss.data.stocks.open.returns_rs”大于1000。

期待出局是

{
    "_id" : "20141029", 

'portfolio_stock_gain_or_loss': [

        {
            "data" : [
                {
                    "portfolio" : "Mystocks",
                    "stocks" : [
                        {
                            "open" : {
                                "returns_rs" : 9144
                            },
                            "scripcode" : "532540",
                            "both" : {
                                "returns_rs" : 9426.75
                            }
                        }


                    ]
                }
            ],
            "user" : "mzmmohideen@gmail.com"
        },
        {
            "data" : [
                {
                    "portfolio" : "pff",
                    "stocks" : [
                        {
                            "open" : {
                                "returns_rs" : 4000
                            },
                            "scripcode" : "500790",
                            "both" : {
                                "returns_rs" : 8500
                            }
                        },

                    ]
                }
            ],
            "user" : "mani@ithoughtz.com"
        }
    ]
}

有关如何在现有数据上执行此操作或我是否需要更改格式的任何想法？

非常感谢

Answer 1

您的mongo文档太嵌套了我认为如果可能，您应该重新构建您的mongo文档。否则，如果您想继续使用相同的文档，那么mongo聚合可以帮助解决您的问题。我写下面的mongo聚合我觉得它解决了你的问题

    db.MyCollection.aggregate([ 
                              {"$unwind":"$portfolio_stock_gain_or_loss"}, 
                              {"$unwind":"$portfolio_stock_gain_or_loss.data"}, 
                              {"$unwind":"$portfolio_stock_gain_or_loss.data.stocks"},
                              {"$project":{"openStock":"$portfolio_stock_gain_or_loss.data.stocks.open","data":"$portfolio_stock_gain_or_loss.data"}},
                              {"$match": {"openStock.returns_rs":{"$gt":1000}}} ]).pretty()

基于$ gt的mongodb复杂集合过滤

1 个答案: