Field of Model :
time = models.DateTimeField()
How to get objects which were created (only) today (from 00:00:00 to 23:59:59)
like:
objects = Model.objects.filter(time__gt=?????????)
or ?
Thanks
You can use datetime.date.today() to get the current date and then filter objects based on today's date.
You can do something like:
import datetime
today = datetime.date.today() # date representing today's date
qs = MyModel.objects.filter(time__gt=today) # filter objects created today
Here, qs represents the objects which were created today.
Another solution is to use range which is used to perform lookup between two dates.
Here, start_date represents 00:00:00 and end_date represents 23:59:59.
import datetime
today = datetime.datetime.today()
start_date = datetime.datetime(year=today.year, month=today.month, day=today.day, hour=0, minute=0, second=0) # represents 00:00:00
end_date = datetime.datetime(year=today.year, month=today.month, day=today.day, hour=23, minute=59, second=59) # represents 23:59:59
qs = MyModel.objects.filter(time__range=(start_date, end_date)) # today's objects
Since you are using Django Rest Framework, you might need to override the get_queryset() method in your view and return the queryset containing the objects that were created today.
class MyView(..):
def get_queryset(self):
..
return qs # return the queryset created using the above logic
import datetime
today = datetime.date.today()
qs = MyModel.objects.filter(time__date=today)
Related
I have the TIMESTAMP data like:
[29:23:59:45]
This stands for whatever month 29, 23:59:45
How can I convert in PySpark to like DAY 29, TIME:23:59:45?
Possibly using something like
from datetime import datetime
dVal = datetime.strptime('[29:23:59:45]', '%d/%h/%m/%s')
This is a classic example for which is needed to use a User Defined Function (UDF).
from datetime import datetime
from spark.sql import functions as F
def toDate(x):
return datetime.strptime(x, '%m %H:%M:%S')
toDate = F.udf(toDate)
new_df = df.withColumn('date', toDate(F.col('timestamp'))
where, df is supposed to be the old dataframe containing a column named 'timestamp' as you reported.
I am trying to split a flowfile into multiple flow files on the basis of adding a month to a date which i am getting in the coming flowfile.
eg.
{"to":"2019-12-31T00:00:00Z","from":"2019-03-19T15:36:48Z"}
be the dates i am getting in a flowfile . so i have to split this single flow file into 11 flowfiles with date ranges like
{"to":"2019-04-19","from":"2019-03-19"}
{"to":"2019-05-19","from":"2019-04-19"}
{"to":"2019-06-19","from":"2019-05-19"}
....... and so till
{"to":"2019-12-31","from":"2019-12-19"} .
i have been trying with example inputs to split files with this into day wise flowfiles:
`
begin = '2018-02-15'
end = '2018-04-23'
dt_start = datetime.strptime(begin, '%Y-%m-%d')
dt_end = datetime.strptime(end, '%Y-%m-%d')
one_day = timedelta(days = 1)
start_dates = [dt_start]
end_dates = []
today = dt_start
while today <= dt_end:
tomorrow = today + one_day
print(tomorrow)
`
but i get a error in my Execute script processor. nifi flow screenshot
Since you're using Jython, you may have to cast today to some Jython/Python time variable or call today.getTime() in order to do arithmetic operations on it.
I am working on statistics page of my app and trying to query data by date.
To get the date range, I use Calendar.Date
date_range = Date.days_after_until(start_date, end_date, true)
|> Enum.to_list
And it returns date list of dates and each date looks like "2017-04-07". So with the date I got from date_range, I tried to query but it triggers an error like below.
where cannot be cast to type Ecto.DateTime in query: from o in Myapp.Order,
where: o.created_date >= ^~D[2017-04-07]
For created_date field of Order, I made field like this,
field :created_date, Ecto.DateTime.
If I want to query by date, how can I query it?
Thank in advance.
It looks like you're trying to compare a date and datetime. You need to cast one of them to the other type so the comparison works, e.g. convert the datetime in the database to a date:
date = ~D[2017-01-01]
from p in Post, where: fragment("?::date", p.inserted_at) >= ^date
or convert the Elixir Date to NaiveDateTime:
{:ok, datetime} = NaiveDateTime.new(date, ~T[00:00:00])
from p in Post, where: p.inserted_at >= ^datetime
If you have a start and end date, you just need to add an and to either. You don't need to generate the whole list of dates using any library.
from p in Post,
where: fragment("?::date", p.inserted_at) >= ^start_date and
fragment("?::date", p.inserted_at) <= ^end_date
or
from p in Post,
where: p.inserted_at >= ^start_datetime and
p.inserted_at <= ^end_datetime
I'm receiving timestamps in the following format '2016-08-17T14:00:00-04:00', which I can parse in moment with moment('2016-08-17T14:00:00-04:00', 'YYYY-MM-DDTHH:mm:ssZ').
But the problem is that I want to print out .format('LLLL') and have it read Wednesday, August 17, 2016 10:00 AM, i.e. subtracting -04:00 from 14:00:00 (NY from UTC). It appears that there is a _tzm: -240 property in the moment object that looks like it holds that -4 hours value, but how do I use that property?
The other goal is to be able to pass in the current time and test if it is between the startDate and endDate variables below. I am guessing if I can convert both to NY-EST I can do this, but I can't seem to get moment to accept the timezone parameter.
Any thoughts?
var moment = require('moment');
// Timestamp strings from API
var startDate = '2016-08-17T14:00:00-04:00';
var endDate = '2016-08-17T15:00:00-04:00';
// Create a range from the start and end dates
var range = moment().range(new Date(startDate), new Date(endDate));
// Get the current time
var currentTime = new Date();
// Does the current time fall within the range b/w the start and end dates
range.contains(currentTime);
A solution I found is below. Adding the value from momentObj._tzm to the parsed date.
module.exports.convertDateToProperTimezone = function (dt) {
var _m = moment(dt, 'YYYY-MM-DDTHH:mm:ssZ');
return _m.add(_m._tzm, 'minutes');
};
I am using JodaTime2 library to create a date object with a given timezone as follow:
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
DateTimeZone tz = DateTimeZone.forID("America/New_York");
System.out.println("timezone=" + tz);
Date d = new DateTime(2013, 1, 1, 0, 0, tz).toDate();
System.out.println("Cur Date = " + d);
However when I print this date, the timezone reported is CST. What am I missing ?
timezone=America/New_York
Cur Date = Tue Jan 01 13:00:00 CST 2013
You're printing out the value of a Date object. Date doesn't have a time zone - Date.toString() always just uses the "default" time zone. A Date is just a number of milliseconds since the Unix epoch; it doesn't know about calendars or time zones.
You should either just stick within the Joda Time world, or (if you must) use a SimpleDateFormatter to convert a Date to a String - you can set the time zone on the formatter.