Fixed #2443 -- Added DurationField.

A field for storing periods of time - modeled in Python by timedelta. It
is stored in the native interval data type on PostgreSQL and as a bigint
of microseconds on other backends.

Also includes significant changes to the internals of time related maths
in expressions, including the removal of DateModifierNode.

Thanks to Tim and Josh in particular for reviews.
This commit is contained in:
Marc Tamlyn 2014-07-24 13:57:24 +01:00
parent a3d96bee36
commit 57554442fe
26 changed files with 524 additions and 138 deletions

View file

@ -1,9 +1,9 @@
from __future__ import unicode_literals
from datetime import date, time, datetime
from datetime import date, time, datetime, timedelta
import unittest
from django.utils.dateparse import parse_date, parse_time, parse_datetime
from django.utils.dateparse import parse_date, parse_time, parse_datetime, parse_duration
from django.utils.timezone import get_fixed_timezone
@ -46,3 +46,43 @@ class DateParseTests(unittest.TestCase):
# Invalid inputs
self.assertEqual(parse_datetime('20120423091500'), None)
self.assertRaises(ValueError, parse_datetime, '2012-04-56T09:15:90')
class DurationParseTests(unittest.TestCase):
def test_seconds(self):
self.assertEqual(parse_duration('30'), timedelta(seconds=30))
def test_minutes_seconds(self):
self.assertEqual(parse_duration('15:30'), timedelta(minutes=15, seconds=30))
self.assertEqual(parse_duration('5:30'), timedelta(minutes=5, seconds=30))
def test_hours_minutes_seconds(self):
self.assertEqual(parse_duration('10:15:30'), timedelta(hours=10, minutes=15, seconds=30))
self.assertEqual(parse_duration('1:15:30'), timedelta(hours=1, minutes=15, seconds=30))
self.assertEqual(parse_duration('100:200:300'), timedelta(hours=100, minutes=200, seconds=300))
def test_days(self):
self.assertEqual(parse_duration('4 15:30'), timedelta(days=4, minutes=15, seconds=30))
self.assertEqual(parse_duration('4 10:15:30'), timedelta(days=4, hours=10, minutes=15, seconds=30))
def test_fractions_of_seconds(self):
self.assertEqual(parse_duration('15:30.1'), timedelta(minutes=15, seconds=30, milliseconds=100))
self.assertEqual(parse_duration('15:30.01'), timedelta(minutes=15, seconds=30, milliseconds=10))
self.assertEqual(parse_duration('15:30.001'), timedelta(minutes=15, seconds=30, milliseconds=1))
self.assertEqual(parse_duration('15:30.0001'), timedelta(minutes=15, seconds=30, microseconds=100))
self.assertEqual(parse_duration('15:30.00001'), timedelta(minutes=15, seconds=30, microseconds=10))
self.assertEqual(parse_duration('15:30.000001'), timedelta(minutes=15, seconds=30, microseconds=1))
def test_negative(self):
self.assertEqual(parse_duration('-4 15:30'), timedelta(days=-4, minutes=15, seconds=30))
def test_iso_8601(self):
self.assertEqual(parse_duration('P4Y'), None)
self.assertEqual(parse_duration('P4M'), None)
self.assertEqual(parse_duration('P4W'), None)
self.assertEqual(parse_duration('P4D'), timedelta(days=4))
self.assertEqual(parse_duration('P0.5D'), timedelta(hours=12))
self.assertEqual(parse_duration('PT5H'), timedelta(hours=5))
self.assertEqual(parse_duration('PT5M'), timedelta(minutes=5))
self.assertEqual(parse_duration('PT5S'), timedelta(seconds=5))
self.assertEqual(parse_duration('PT0.000005S'), timedelta(microseconds=5))