Fixed #36616 -- Added DatabaseOperations.adapt_durationfield_value().

Author: timgraham

django/db/backends/base/operations.py

@@ -9,6 +9,7 @@
 from django.db import NotSupportedError, transaction
 from django.db.models.expressions import Col
 from django.utils import timezone
+from django.utils.duration import duration_microseconds
 from django.utils.encoding import force_str
 
 
@@ -564,6 +565,16 @@ def adapt_datetimefield_value(self, value):
             return None
         return str(value)
 
+    def adapt_durationfield_value(self, value):
+        """
+        Transform a timedelta value into an object compatible with what is
+        expected by the backend driver for duration columns (by default,
+        an integer of microseconds).
+        """
+        if value is None:
+            return None
+        return duration_microseconds(value)
+
     def adapt_timefield_value(self, value):
         """
         Transform a time value to an object compatible with what is expected

django/db/backends/oracle/operations.py

@@ -608,6 +608,9 @@ def adapt_datetimefield_value(self, value):
 
         return Oracle_datetime.from_datetime(value)
 
+    def adapt_durationfield_value(self, value):
+        return value
+
     def adapt_timefield_value(self, value):
         if value is None:
             return None

django/db/backends/postgresql/operations.py

@@ -330,6 +330,9 @@ def adapt_datefield_value(self, value):
     def adapt_datetimefield_value(self, value):
         return value
 
+    def adapt_durationfield_value(self, value):
+        return value
+
     def adapt_timefield_value(self, value):
         return value
 

django/db/models/fields/__init__.py

@@ -30,7 +30,7 @@
     parse_duration,
     parse_time,
 )
-from django.utils.duration import duration_microseconds, duration_string
+from django.utils.duration import duration_string
 from django.utils.functional import Promise, cached_property
 from django.utils.ipv6 import MAX_IPV6_ADDRESS_LENGTH, clean_ipv6_address
 from django.utils.text import capfirst
@@ -1890,11 +1890,7 @@ def to_python(self, value):
         )
 
     def get_db_prep_value(self, value, connection, prepared=False):
-        if connection.features.has_native_duration_field:
-            return value
-        if value is None:
-            return None
-        return duration_microseconds(value)
+        return connection.ops.adapt_durationfield_value(value)
 
     def get_db_converters(self, connection):
         converters = []

docs/releases/6.1.txt

@@ -243,7 +243,9 @@ Database backend API
 This section describes changes that may be needed in third-party database
 backends.
 
-* ...
+* The ``DatabaseOperations.adapt_durationfield_value()`` hook is added. If the
+  database has native support for ``DurationField``, override this method to
+  simply return the value.
 
 Miscellaneous
 -------------