Fixed #33080 -- Preserved nullability of textual fields on Oracle.

Thanks Matt Hoskins for the report.

1 files changed, 4 insertions, 2 deletions

diff --git a/django/db/backends/base/schema.py b/django/db/backends/base/schema.py
index 15ccda52e2..896ea3d517 100644
--- a/django/db/backends/base/schema.py
+++ b/django/db/backends/base/schema.py
@@ -880,8 +880,10 @@ class BaseDatabaseSchemaEditor:
         Return a (sql, params) fragment to set a column to null or non-null
         as required by new_field, or None if no changes are required.
         """
-        if (self.connection.features.interprets_empty_strings_as_nulls and
-                new_field.get_internal_type() in ("CharField", "TextField")):
+        if (
+            self.connection.features.interprets_empty_strings_as_nulls and
+            new_field.empty_strings_allowed
+        ):
             # The field is nullable in the database anyway, leave it alone.
             return
         else: