本文介绍了如何使用 pymongo 在 mongodb 中查询日期?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我正在尝试在 mongodb 中执行查询日期，但结果始终为空.我的查询如下:
I'm trying to perform a query date in mongodb, but the result is always empty. My query is as follows:
//in the begin code
def __init__(self):
self.now = datetime.now()
self.db = conexaoMongo()
self.horaInicio = self.now - timedelta(minutes=1)
def resultadoConsulta(self, modo, porta, id_node):
#print "Porta e No ", porta, id_node
resultadoMongo = []
mediaFinal = False
try:
json = {'id_no': int(id_node), 'datahora': {'$gte': self.horaInicio, '$lt': self.now}, 'porta': porta}
print "COnsulta a ser realizada: ", json
resultadoMongo = self.db.queryMongoOne(json)
//变量resultaMongo返回空.
//variable resultaMongo return empty.
Obs:我也试过不使用 .isoformat()当我直接放入mongodb时，只有添加ISODate才会返回结果.所以不返回结果:
Obs: I also tried without using .isoformat() When I put in mongodb directly, only return results if I add ISODate. So does not return results:
db.inoshare.find( {'id_no': 1, 'datahora': {'$lte': '2014-09-24T07:52:04.945306', '$gte': '2014-09-24T07:51:04.958496'}, 'porta': 'A0'})
如果您编辑退货则更是如此:
More so if you edit returns:
db.inoshare.find( {'id_no': 1, 'datahora': {'$lte': ISODate('2014-09-24T07:52:04.945306'), '$gte': ISODate('2014-09-24T07:51:04.958496')}, 'porta': 'A0'})
这是数据库中的一系列记录:
This is a sequence of records in the database:
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cb5"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:05Z"), "valor" : "917", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cb9"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:07Z"), "valor" : "932", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cbd"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:09Z"), "valor" : "189", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cc1"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:11Z"), "valor" : "853", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cc5"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:13Z"), "valor" : "202", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cc9"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:15Z"), "valor" : "398", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2ccd"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:17Z"), "valor" : "947", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cd1"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:19Z"), "valor" : "57", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cd5"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:21Z"), "valor" : "395", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cd9"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:23Z"), "valor" : "941", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2cdd"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:25Z"), "valor" : "208", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2ce1"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:27Z"), "valor" : "186", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2ce5"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:29Z"), "valor" : "848", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2ce9"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:31Z"), "valor" : "571", "sensor" : "1" }
{ "_id" : ObjectId("5435be9ce7b9916e02ed2ced"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:33Z"), "valor" : "351", "sensor" : "1" }
{ "_id" : ObjectId("5435be9de7b9916e02ed2cf1"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:35Z"), "valor" : "558", "sensor" : "1" }
{ "_id" : ObjectId("5435be9de7b9916e02ed2cf5"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:37Z"), "valor" : "449", "sensor" : "1" }
{ "_id" : ObjectId("5435be9de7b9916e02ed2cf9"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:39Z"), "valor" : "768", "sensor" : "1" }
{ "_id" : ObjectId("5435be9de7b9916e02ed2cfd"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:41Z"), "valor" : "542", "sensor" : "1" }
{ "_id" : ObjectId("5435be9de7b9916e02ed2d01"), "lab" : "2", "porta" : "A0", "id_no" : 1, "datahora" : ISODate("2014-09-24T07:51:43Z"), "valor" : "763", "sensor" : "1" }
如果我打印 python 的 json 变量，我会看到类似:
if i print the json variable of python, i see something like:
{'id_no': 1, 'datahora': {'$gte': datetime.datetime(2014, 9, 24, 8, 21, 38, 527653), '$lt': datetime.datetime(2014, 9, 24, 8, 22, 36, 677022)}, 'porta': 'A1'}
我的 Mongndb 类连接是:
My Mongndb Class connection is:
#!/usr/bin/python
from pymongo import MongoClient
class conexaoMongo:
def __init__(self):
self.conditions = []
self.client = MongoClient("127.0.0.1", 27017, safe=True)
self.db = self.client['inoshare']
self.ino = self.db.inoshare
def queryMongo(self, param1, param2=None, param3=None):
try:
if param2 != None:
results = self.ino.find(param1, param2)
elif param3 != None:
results = self.ino.find(param1, param2, param3)
else:
results = self.ino.find(param1)
#print "Total de registros ", results.count()
for post in results:
#print post
self.conditions.append(post)
return self.conditions
except:
print "Erro ao executar a query"
推荐答案
@Joni 正确，需要使用 datetime.
@Joni is correct, you need to use datetime.
from datetime import datetime
from pymongo import Connection
# i have updated and included the complete code
client = Connection('localhost', 27017)
db = client['database'] # your database name
inoshare = db['inoshare']
# convert your date string to datetime object
start = datetime(2014, 9, 24, 7, 51, 04)
end = datetime(2014, 9, 24, 7, 52, 04)
inoshare.find( {'id_no': 1, 'datahora': {'$lt': end, '$gte': start}, 'porta': 'A0'})
<pymongo.cursor.Cursor at 0x7f9aafd64a90>
inoshare.find_one( {'id_no': 1, 'datahora': {'$lt': end, '$gte': start}, 'porta': 'A0'})
{u'_id': ObjectId('5435be9ce7b9916e02ed2cb5'),
u'datahora': datetime.datetime(2014, 9, 24, 7, 51, 5),
u'id_no': 1.0,
u'lab': u'2',
u'porta': u'A0',
u'sensor': u'1',
u'valor': u'917'}
显然我可以成功返回结果.也许您的数据已损坏，或者您应该发布所有代码供我们审查
clearly I can successfully return results. Perhaps your data is corrupt, or you should post all your code for us to review
这篇关于如何使用 pymongo 在 mongodb 中查询日期?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！
本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益，请联系我们，我们会在确认后第一时间进行删除！