MongoDB更新转换模式

我想转换集合中的所有文档

比如我有

{
        "_id": ObjectId("5004918de59cfc4e92ba1cf6"),
        "field1": 1,
        "field2": 2,
        "field3": 3,
        "field4": 4
    }

我想变成这样

    {
    "_id": ObjectId("5004918de59cfc4e92ba1cf6"),
    "fieldSet1": {
        "field1": 1,
        "field2": 2
    },
    "fieldSet2": {
        "field3": 3,
        "field4": 4
    }
}

谢谢你宝贵的帮助！ Gilles.

您可以使用mongo的功能

在您的示例中：

db.yourcollection.update( { _id: 1 }, 
    { $rename: { "field1": "fieldSet1.field1", 
                 "field2": "fieldSet1.field2", 
                 "field3": "fieldSet2.field3", 
                 "field4": "fieldSet2.field4", } } )

您可以使用mongo的功能

在您的示例中：

db.yourcollection.update( { _id: 1 }, 
    { $rename: { "field1": "fieldSet1.field1", 
                 "field2": "fieldSet1.field2", 
                 "field3": "fieldSet2.field3", 
                 "field4": "fieldSet2.field4", } } )