Drop Django 4.2 to 5.1 support (#1196)

These versions are all EOL since April.

Author: adamchainz

docs/changelog.rst

@@ -2,6 +2,11 @@
 Changelog
 =========
 
+Unreleased
+----------
+
+* Drop Django 4.2 to 5.1 support.
+
 * Drop Python 3.9 support.
 
 4.19.0 (2025-09-18)

docs/installation.rst

@@ -6,7 +6,7 @@ Requirements
 
 Python 3.10 to 3.14 supported.
 
-Django 4.2 to 6.0 supported.
+Django 5.2 to 6.0 supported.
 
 Tested on MySQL 8.4+ and MariaDB 10.6+.
 

pyproject.toml

@@ -26,9 +26,6 @@ requires-python = ">=3.10"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Framework :: Django",
-  "Framework :: Django :: 4.2",
-  "Framework :: Django :: 5.0",
-  "Framework :: Django :: 5.1",
   "Framework :: Django :: 5.2",
   "Framework :: Django :: 6.0",
   "Intended Audience :: Developers",
@@ -45,7 +42,7 @@ classifiers = [
   "Typing :: Typed",
 ]
 dependencies = [
-  "django>=4.2",
+  "django>=5.2",
 ]
 urls.Changelog = "https://django-mysql.readthedocs.io/en/latest/changelog.html"
 urls.Documentation = "https://django-mysql.readthedocs.io/"
@@ -71,19 +68,13 @@ docs = [
   "sphinx-build-compatibility",
   "sphinx-copybutton>=0.5.2",
 ]
-django42 = [ "django>=4.2a1,<5; python_version>='3.8'" ]
-django50 = [ "django>=5a1,<5.1; python_version>='3.10'" ]
-django51 = [ "django>=5.1a1,<5.2; python_version>='3.10'" ]
 django52 = [ "django>=5.2a1,<6; python_version>='3.10'" ]
 django60 = [ "django>=6a1,<6.1; python_version>='3.12'" ]
 
 [tool.uv]
 sources.sphinx-build-compatibility = { git = "https://github.com/readthedocs/sphinx-build-compatibility", rev = "4f304bd4562cdc96316f4fec82b264ca379d23e0" }
 conflicts = [
   [
-    { group = "django42" },
-    { group = "django50" },
-    { group = "django51" },
     { group = "django52" },
     { group = "django60" },
   ],

tests/testapp/test_bit1_field.py

@@ -2,7 +2,6 @@
 
 import json
 
-import django
 from django.core import checks, serializers
 from django.db import models
 from django.db.models import F
@@ -100,10 +99,7 @@ def test_check_deprecated(self):
         class Invalid(models.Model):
             nb = NullBit1BooleanField()
 
-        if django.VERSION >= (5, 0):
-            hint = "Use BooleanField(null=True, blank=True) instead."
-        else:
-            hint = "Use BooleanField(null=True) instead."
+        hint = "Use BooleanField(null=True, blank=True) instead."
 
         assert Invalid.check() == [
             checks.Error(

tox.ini

@@ -3,10 +3,10 @@ requires =
     tox>=4.2
 env_list =
     py314-django{60, 52}
-    py313-django{60, 52, 51}
-    py312-django{60, 52, 51, 50, 42}
-    py311-django{52, 51, 50, 42}
-    py310-django{52, 51, 50, 42}
+    py313-django{60, 52}
+    py312-django{60, 52}
+    py311-django{52}
+    py310-django{52}
 
 [testenv]
 runner = uv-venv-lock-runner