RethinkDB is a wonderfull and very handy NoSQL Database engine. I looking for the best way to insert Python datetime objects. RethinkDB strores UTC timestamps, so I found a solution to convert my datetime object in the right format.
I use this litle function to convert my datetime object in somethink RethinkDB understand :
import calendar
from datetime import datetime
import rethinkdb as r
def datetime_to_epoch_time(dt):
timestamp = calendar.timegm(dt.utctimetuple())
return r.epoch_time(timestamp)
title = u'foobar'
published_at = '2014-03-17 14:00'
# firts I convert 2014-03-17 14:00 to datetime
dt = datetime.strptime(published_at, '%Y-%m-%d %H:%M')
# then I store the result
r.table('stories').insert({
'title': title,
'published_at': datetime_to_epoch_time(dt),
}).run()
My current timezone is CET (GMT + 2 hours) Is this a good solution for storing my dates in rethinkdb or a better solution exists ?
Thanks for your help
An example with Pytz :
from datetime import datetime
import pytz
import rethinkdb as r
# Init
r.connect('localhost', 28015).repl()
if 'test' in r.db_list().run():
r.db_drop('test').run()
r.db_create('test').run()
r.db('test').table_create('stories').run()
paris = pytz.timezone('Europe/Paris')
r.table('stories').insert({
'title': u'Foobar',
'published_at': paris.localize(datetime.strptime(
'2014-03-17 14:00', '%Y-%m-%d %H:%M'
), is_dst=False)
}).run()
for document in r.table("stories").run():
print(document['published_at'])
print(type(document['published_at']))
dt.utctimetuple()
doesn't convert a naive dt
to UTC timezone i.e., if published_at
is not in UTC already then it returns the wrong result.
If published_at
is in local timezone and therefore dt
is in local timezone:
from datetime import datetime
import pytz # $ pip install pytz
from tzlocal import get_localzone # $ pip install tzlocal
tz = get_localzone()
aware_dt = tz.localize(dt, is_dst=None)
timestamp = (aware_dt - datetime(1970, 1, 1, tzinfo=pytz.utc)).total_seconds()
# ... r.epoch_time(timestamp)
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