这是我的收藏:
pageIndex
这是我试过的:
{
"Id" : "4",
"tType" : "77",
"tId" : "001",
"variables" : [
{
"controller" : 4444,
"mod" : 41,
"var" : "41",
"Type" : 4,
"vType" : "DI",
"duration" : "",
"Data" : [
{
"Time" : 1483209000,
"value" : 50
},
{
"Time" : 1483209000,
"value" : 50
}
]
},
{
"controller" : 1,
"mod" : 1,
"var" : "1",
"Type" : 11,
"vType" : "AO",
"duration" : "",
"Data" : [
{
"Time" : 1483209000,
"value" : 30
},
{
"Time" : 1483209000,
"value" : 30
}
]
}
]
}
在我的集合中,我需要首先设置数据数组字段,基于过滤条件变量数组控制器,tType字段,但在我上面的聚合查询中它检索所有变量数组
答案 0 :(得分:0)
您可以尝试此查询:
db.app.aggregate([ {$match:{
"variables.controller":4444,
"variables.mod":41,
"variables.var":"41"
}}, {$project:{data:"$variables.Data", _id:0}},{$unwind:"$data"},{$unwind:"$data"},{$limit:1} ]).pretty()