Question

如何在mongoDB 2或3中查询以下文档中的所有标记：

{
  "took": 5,
  "timed_out": false,
  "_shards": {
    "total": 2,
    "successful": 2,
    "failed": 0
  },
  "hits": {
    "total": 2,
    "max_score": 14.069489,
    "hits": [
      {
        "_index": "reviewer-bdd-test-index",
        "_type": "importFile",
        "_id": "AU9kUka2hr5Jg98UXOae",
        "_score": 14.069489,
        "_source": {
          "fileName": "Group-1.uhh",
          "groupId": "0ae1206d0644eabd82ae490e612732df5da2cd141fdee70dc64207f86c96094f",
          "filePath": ""
        }
      },
      {
        "_index": "reviewer-bdd-test-index",
        "_type": "importFile",
        "_id": "AU9kZO25hr5Jg98UXRnk",
        "_score": 14.069489,
        "_source": {
          "fileName": "group-1.uhh",
          "groupId": "0ae1206d0644eabd82ae490e612732df5da2cd141fdee70dc64207f86c96094f",
          "filePath": ""
        }
      }
    ]
  }
}

我在结果中需要这样的东西：

{
    "_id" : ObjectId("55dc45017137a4e70b8b4569"),
    "campainName" : "",
    "themeName" : "theme1",
    "emailListName" : "eiEmails",
    "emailSubject" : "",
    "emailFrom" : "",
    "allNews" : [ 
        {
            "type" : "1",
            "tag" : ['aa','bb','cc'],
            "link" : "",
            "image" : ""
        }
    ]
},
{
    "_id" : ObjectId("55dc45017137a4e70b8b4570"),
    "campainName" : "",
    "themeName" : "theme2",
    "emailListName" : "afaeiEmails",
    "emailSubject" : "",
    "emailFrom" : "",
    "allNews" : [ 
        {
            "type" : "1",
            "tag" : ['da','db','dc'],
            "link" : "",
            "image" : ""
        }
    ]
}

我需要在教条中使用查询风格。

Answer 1

尝试这样的事情：

db.collection.find({}, {"allNews.tag" : 1, _id : 0})

mongodb中的嵌套查询

1 个答案: