fixes check() implementation

.github/workflows/tests.yaml

@@ -27,7 +27,7 @@ jobs:
             fail-fast: false
             matrix:
                 python-version: [ "3.8", "3.9", "3.10"]
-                django-version: [ "2.2", "3.2", "4.0", "4.1"]
+                django-version: [ "3.2", "4.0", "4.2"]
                 db-engine: ["pg", "mysql"]
         env:
             PY_VER: ${{ matrix.python-version}}

CHANGES

@@ -1,3 +1,8 @@
+(dev)
+-----
+* BUG FIX: fixes check() implementation
+
+
 Release 2.5
 -----------
 * removes deprecatd MANUAL_TRIGGERS

src/concurrency/admin.py

@@ -267,7 +267,7 @@ class ConcurrentModelAdmin(ConcurrencyActionMixin,
     formfield_overrides = {forms.VersionField: {'widget': VersionWidget}}
 
     def check(self, **kwargs):
-        errors = []
+        errors = super().check(**kwargs)
         if self.fields:
             version_field = self.model._concurrencymeta.field
             if version_field.name not in self.fields:

tests/conftest.py

@@ -1,5 +1,7 @@
 import os
 import platform
+from pathlib import Path
+
 import sys
 
 import pytest
@@ -14,6 +16,9 @@
 
 skippypy = pytest.mark.skipif(PYPY, reason='skip on pypy')
 
+here = Path(__file__).parent
+sys.path.insert(0, str(here / 'tests' / "demoapp"))
+
 
 def pytest_configure():
     from django.conf import settings