Make Django4.2 run with the mysql variant of PositiveAutoField

README.md

@@ -1,3 +1,17 @@
 # Ktools
 
 This module contains boilerplate for python projects, mostly based on django.
+
+## Contents
+
+### Django
+
+#### PositiveAutoField
+
+A mysql-based `AutoField` that will use an `UNSIGNED INT` for a primary field.
+
+Use this in django's `settings.py`:
+
+```
+DEFAULT_AUTO_FIELD = 'ktools.django.db.models.fields.PositiveAutoField'
+```

src/ktools/django/db/models/fields/__init__.py

@@ -1,11 +1,20 @@
+from django.db.backends.mysql.base import DatabaseWrapper
+from django.db.backends.mysql.operations import DatabaseOperations
 from django.db.models.fields import (
-    AutoFieldMeta, AutoFieldMixin, PositiveIntegerField)
+    AutoField, AutoFieldMeta, PositiveIntegerField)
+
+DatabaseOperations.integer_field_ranges['PositiveAutoField'] = \
+    DatabaseOperations.integer_field_ranges['PositiveIntegerField']
+DatabaseOperations.cast_data_types['PositiveAutoField'] = \
+    DatabaseOperations.cast_data_types['PositiveIntegerField']
+DatabaseWrapper.data_types['PositiveAutoField'] = \
+    'integer UNSIGNED AUTO_INCREMENT'
 
 
 class PositiveAutoField(
-        AutoFieldMixin, PositiveIntegerField, metaclass=AutoFieldMeta):
+        AutoField, PositiveIntegerField, metaclass=AutoFieldMeta):
     def get_internal_type(self):
-        return "PositiveAutoField"
+        return 'PositiveAutoField'
 
     def rel_db_type(self, connection):
         return PositiveIntegerField().db_type(connection=connection)