0
我在尝试查找适当的查询以查看数据在我的表中时遇到了一些问题,我已经尝试过使用elementMatch,在其他问题中阅读了很多内容。尝试$编辑,但我只能得到2个文件中的1个。我做错了什么?为什么我只有一个? 我有这个文件在集合中查找多个元素匹配
{
"_id" : "dff26f9c-350b-4bd5-bc62-62c19f21100c",
"sensorId" : "123456",
"sensorModel" : "LOOP",
"attachments" : [
{
"type" : "StructAttachment",
"data" : "STRUCT DATA"
},
{
"type" : "BlobAttachment",
"data" : { "$binary" : "QkxPQl9EQVRB", "$type" : "00" }
},
{
"type" : "otherData",
"data" : { "$binary" : "QkxPQl9EQVRB", "$type" : "00" }
}
]
}
我期待的结果
{
"_id" : "dff26f9c-350b-4bd5-bc62-62c19f21100c",
"sensorId" : "123456",
"sensorModel" : "LOOP",
"attachments" : [
{
"type" : "StructAttachment",
"data" : "STRUCT DATA"
},
{
"type" : "BlobAttachment",
"data" : { "$binary" : "QkxPQl9EQVRB", "$type" : "00" }
}
]
}
我想通过_id和attachment.type(”过滤structAttachment“或”blobAttachment“)
谢谢你的回复快,你错过了ID,但是我能够与 db.getCollection(“测量”)加总( { \t $比赛:{ “_id”: “dff26f9c-350B-4bd5-bc62-62c19f21100c”}} , { “$项目”:{ “sensorId”:1, “sensorModel”:1, “附件”:{ “$ filter”:{ “input”:“$ attachments”, “as”:“attachment”, “COND”:{ “$ setIsSubset”:[ [ “$$ attachment.type”], [ “StructAttachment”, “BlobAttachment”] ] } } } } }) – Guel135