在聚合中创建对象

Question

我在UserId和Aggregation Framework之后得到了这个结果。我想创建一个单独的文档与＆＃34;合并＆＃34;阵列foo和能力

我的聚合

{
    "result" : [ 
        {
            "_id" : {
                "userId" : ObjectId("53bab268ceee750615240269")
            },
            "foo" : [ 
                "0.109", 
                "0.105", 
                "0.50", 
                "0.1", 
                "foo"
            ],
            "ability" : [ 
                "Power", 
                "Energy", 
                "ReactiveEnergy", 
                "Stamina", 
                "bar"
            ]
        }
    ],
    "ok" : 1
}

我喜欢

{
    "result" : [ 
        {
            "_id" : {
                "userId" : ObjectId("53bab268ceee750615240269")
            },
            "fooFinal" : [ 
                {"0.109",power} 
                {"0.105",Energy }
                {"0.50",ReactiveEnergy }
                {"0.1",Stamina }
                {"foo",bar}
            ],
        }
    ],
    "ok" : 1
}

我想使用类似的$ each，但我不能在聚合

中使用它

Answer 1

尝试在$ group中执行此操作

 $group:{
    _id:{'userId':'$userId'},
    'fooFinal' : {$push:{
        foo:'$foo',
        ability:'$ability'}
    }
}