Use Django 3.2 timesince depth parameter for child age

core/templatetags/duration.py

@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
 from django import template
+from django.utils import timesince, timezone
+from django.utils.translation import gettext as _
 
 from core import utils
 
@@ -10,14 +12,17 @@ register = template.Library()
 @register.filter
 def child_age_string(birth_date):
     """
-    Format a Child's age with monkey-patched timesince.
+    Format a Child's age with a timeunit depth of 1.
     :param birth_date: datetime instance
     :return: a string representation of time since `birth_date`.
     """
     if not birth_date:
         return ''
+    # Return "0 days" for anything under one day.
+    elif timezone.localdate() - birth_date < timezone.timedelta(days=1):
+        return _('0 days')
     try:
-        return utils.child_age_string(birth_date)
+        return timesince.timesince(birth_date, depth=1)
     except (ValueError, TypeError):
         return ''
 

core/tests/tests_templatetags.py

@@ -18,9 +18,13 @@ class TemplateTagsTestCase(TestCase):
 
     def test_child_age_string(self):
         date = timezone.localdate() - timezone.timedelta(days=0, hours=6)
-        self.assertEqual('0\xa0days', duration.child_age_string(date))
+        self.assertEqual('0 days', duration.child_age_string(date))
         date = timezone.localdate() - timezone.timedelta(days=1, hours=6)
         self.assertEqual('1\xa0day', duration.child_age_string(date))
+        date = timezone.localdate() - timezone.timedelta(days=45)
+        self.assertEqual('1\xa0month', duration.child_age_string(date))
+        date = timezone.localdate() - timezone.timedelta(days=95)
+        self.assertEqual('3\xa0months', duration.child_age_string(date))
 
     def test_duration_duration_string(self):
         delta = timezone.timedelta(hours=1, minutes=30, seconds=15)

core/utils.py

@@ -1,23 +1,8 @@
 # -*- coding: utf-8 -*-
-from django.utils import timesince, timezone
+from django.utils import timezone
 from django.utils.translation import ngettext
 
 
-def child_age_string(duration):
-    """Monkey patch timesince function to day precision only.
-    """
-    default_timesine_chunks = timesince.TIMESINCE_CHUNKS
-    timesince.TIMESINCE_CHUNKS = (
-        (60 * 60 * 24 * 365, 'year'),
-        (60 * 60 * 24 * 30, 'month'),
-        (60 * 60 * 24 * 7, 'week'),
-        (60 * 60 * 24, 'day'),
-    )
-    ts = timesince.timesince(duration)
-    timesince.TIMESINCE_CHUNKS = default_timesine_chunks
-    return ts
-
-
 def duration_string(duration, precision='s'):
     """Format hours, minutes and seconds as a human-friendly string (e.g. "2
     hours, 25 minutes, 31 seconds") with precision to h = hours, m = minutes or