使用pymongo按mongodb中的時間范圍查詢

Question

需要對數據庫mongodb執行查詢，從而按時間范圍生成一組結果。 我正在使用pymongo。 我的查詢如下：

query = {"$and": [
                     {"id_node": id_node}
                     {"port": port},
                     {"datetime": {"$gte": self.hourBegin}}
                     {"datetime": {"$lte": self.now}}
                     ]}
listResults = db.mycollection.find (query)

我也嘗試過這種方式：

query = {"id_node": int(id_node)
                     "port": port,
                     "datetime": {"$gte": self.hourBegin, "$lte": self.now}}
listResults = db.mycollection.find (query)

但結果總是空的。 直接在mongodb中測試但結果為空。 我確信數據存在於數據庫中，其中包含我正在研究的時間范圍。

可能的結果列表：

{ "_id" : ObjectId("543618c6e7b9914c35266128"), "lab" : "2", "port" : "A1", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:04Z"), "valor" : "22.00", "sensor" : "2" }
{ "_id" : ObjectId("543618c6e7b9914c35266129"), "lab" : "2", "port" : "A0", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:04Z"), "valor" : "0", "sensor" : "1" }
{ "_id" : ObjectId("543618c6e7b9914c3526612c"), "lab" : "2", "port" : "A1", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:06Z"), "valor" : "22.00", "sensor" : "2" }
{ "_id" : ObjectId("543618c6e7b9914c3526612d"), "lab" : "2", "port" : "A0", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:06Z"), "valor" : "0", "sensor" : "1" }
{ "_id" : ObjectId("543618c7e7b9914c35266130"), "lab" : "2", "port" : "A1", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:08Z"), "valor" : "22.00", "sensor" : "2" }
{ "_id" : ObjectId("543618c7e7b9914c35266131"), "lab" : "2", "port" : "A0", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:08Z"), "valor" : "0", "sensor" : "1" }
{ "_id" : ObjectId("543618c7e7b9914c35266134"), "lab" : "2", "port" : "A1", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:10Z"), "valor" : "22.00", "sensor" : "2" }
{ "_id" : ObjectId("543618c7e7b9914c35266135"), "lab" : "2", "port" : "A0", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:10Z"), "valor" : "0", "sensor" : "1" }
{ "_id" : ObjectId("543618c7e7b9914c35266138"), "lab" : "2", "port" : "A1", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:12Z"), "valor" : "22.00", "sensor" : "2" }
{ "_id" : ObjectId("543618c7e7b9914c35266139"), "lab" : "2", "port" : "A0", "id_node" : 1, "datetime" : ISODate("2014-09-26T18:28:12Z"), "valor" : "0", "sensor" : "1" }

Answer 1

我訪問http://www.querymongo.com/ ，然后創建一個查詢，好像它在MySQL中，然后必須返回一個mongodb查詢。 像這樣：

#MySQL Query
SELECT * FROM inoshare WHERE id_nome = 1 AND port = 1 AND datetime > 'hourBegin' AND datetime <= 'NOW()';

而且回報：

db.inoshare.find({
"id_nome": 1,
"port": 1,
"datetime": {
    "$gt": "hourBegin",
    "$lte": "NOW()"
}
});

然后將'hourBegin'和'NOW（）'替換為變量。 謝謝大家。