Fix filtering by DateTimeField

daterangefilter/filters.py

@@ -1,4 +1,8 @@
+import datetime
+
+from django.db import models
 from django.contrib import admin
+from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 from django.conf import settings
 
@@ -17,6 +21,16 @@ def __init__(self, field, request, params, model, model_admin, field_path):
             params.pop(self.lookup_kwarg_lte)
         if self.lookup_gte and self.lookup_lte:
             self.lookup_val = '{} - {}'.format(self.lookup_gte.replace('-','.'), self.lookup_lte.replace('-','.'))
+            # if we are filtering DateTimeField we should add one day to final date
+            if isinstance(model._meta.get_field(field_path), models.DateTimeField):
+                gte_date = datetime.datetime.strptime(self.lookup_gte, '%Y-%m-%d')
+                lte_date = datetime.datetime.strptime(self.lookup_lte, '%Y-%m-%d')
+                lte_date = lte_date + datetime.timedelta(seconds=3600*24-1)
+                if settings.USE_TZ:
+                    gte_date = timezone.make_aware(gte_date, timezone.get_current_timezone())
+                    lte_date = timezone.make_aware(lte_date, timezone.get_current_timezone())
+                params[self.lookup_kwarg_gte] = gte_date.strftime('%Y-%m-%d %H:%M:%S%z')
+                params[self.lookup_kwarg_lte] = lte_date.strftime('%Y-%m-%d %H:%M:%S%z')
         else:
             self.lookup_val = ''
         super(DateRangeFilter, self).__init__(field, request, params, model, model_admin, field_path)