Question

我有一个db数据如下

SELECT *  FROM PRODUCTS
WHERE CONCAT(code, ' ',description) LIKE %your-string%

我想要一个聚合传输输出如下

{date：＆＃34; 2017-12-01T00：00：0Z＆＃34;，total：＆＃34; 2＆＃34;，已完成：1，失败：1}

我已尝试过此代码，但未按上述方式生成结果

{
"_id" : ObjectId("5a2109572222085be93ef10d"),
"name" : "data1",
"date" : "2017-12-01T00:00.0Z",
"status" : "COMPLETED"},{
"_id" : ObjectId("5a2109572222085be93ef10d"),
"name" : "data1",
"date" : "2017-12-01T00:00.0Z",
"status" : "FAILED"}

Answer 1

db.test.aggregate(

// Pipeline
[
    // Stage 1
    {
        $group: {
         _id:"$date",
         total:{$sum:1},
         failed:{$sum:{$cond:[{$eq:["$status","FAILED"]},1,0]}},
         completed:{$sum:{$cond:[{$eq:["$status","COMPLETED"]},1,0]}}
        }
    },

    // Stage 2
    {
        $project: {
            date : '$_id',
            total : 1,
            failed : 1,
            completed : 1,
            _id : 0,
        }
    },

]
);

mongodb中的聚合函数

1 个答案: