Fixed #30593 -- Added support for check constraints on MariaDB 10.2+.

1 files changed, 10 insertions, 0 deletions

diff --git a/django/db/backends/mysql/base.py b/django/db/backends/mysql/base.py
index 9b88c5ac25..792eae086f 100644
--- a/django/db/backends/mysql/base.py
+++ b/django/db/backends/mysql/base.py
@@ -61,6 +61,7 @@ class CursorWrapper:
     codes_for_integrityerror = (
         1048,  # Column cannot be null
         1690,  # BIGINT UNSIGNED value is out of range
+        4025,  # CHECK constraint failed
     )
 
     def __init__(self, cursor):
@@ -329,6 +330,15 @@ class DatabaseWrapper(BaseDatabaseWrapper):
             return True
 
     @cached_property
+    def data_type_check_constraints(self):
+        if self.features.supports_column_check_constraints:
+            return {
+                'PositiveIntegerField': '`%(column)s` >= 0',
+                'PositiveSmallIntegerField': '`%(column)s` >= 0',
+            }
+        return {}
+
+    @cached_property
     def mysql_server_info(self):
         with self.temporary_connection() as cursor:
             cursor.execute('SELECT VERSION()')