How to make a query date in mongodb using pymongo?

Question

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) 

Answer 1

@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'}

clearly I can successfully return results. Perhaps your data is corrupt, or you should post all your code for us to review

Answer 2

Query conditions on ISODate attributes should use Python's datetime.datetime objects.

That is, don't format your dates as strings using the isoformat function, use them as they are.

Answer 3

If start = datetime(2014, 9, 24, 7, 51, 04) is throwing error,

Try using
start = datetime.datetime(2014, 9, 24, 7, 51, 04) .

Answer 4

The problem is the '04' at the end of

start = datetime(2014, 9, 24, 7, 51, 04)

"SyntaxError: leading zeros in decimal integer literals are not permitted; use an 0o prefix for octal integers"

If you write this way, the problem is solved:

start = datetime.datetime(2014, 9, 24, 7, 51, 4).