[1.9.x] Fixed #26324 -- Fixed DurationField with fractional seconds on SQLite.

Backport of 4f0cd0fd162122da96978b357ac9fc9534529410 from master

1 files changed, 2 insertions, 1 deletions

diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index df2e3b45de..cf7a3c32ac 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -1665,7 +1665,8 @@ class DurationField(Field):
             return value
         if value is None:
             return None
-        return value.total_seconds() * 1000000
+        # Discard any fractional microseconds due to floating point arithmetic.
+        return int(round(value.total_seconds() * 1000000))
 
     def get_db_converters(self, connection):
         converters = []