fix get_context_data if role has no specific context data method (#86)

CHANGELOG.md

@@ -18,6 +18,10 @@ and this project attempts to adhere to [Semantic Versioning](https://semver.org/
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed a bug in `CRUDView.get_context_data` if the role had no specific context data method defined.
+
 ## [0.12.0]
 
 ### Added

src/django_twc_toolbox/crud/views.py

@@ -163,12 +163,17 @@ def get_active_filters(filterset: object):
     @override
     def get_context_data(self, **kwargs: object) -> dict[str, object]:
         context = super().get_context_data(**kwargs)
+
         context["list_view_url"] = Role.LIST.maybe_reverse(self)
         if self.object is not None:
             context["delete_view_url"] = Role.DELETE.maybe_reverse(self, self.object)
             context["detail_view_url"] = Role.DETAIL.maybe_reverse(self, self.object)
             context["update_view_url"] = Role.UPDATE.maybe_reverse(self, self.object)
-        context.update(self.get_role_context_data(context, **kwargs))
+
+        role_context = self.get_role_context_data(context, **kwargs)
+        if role_context:
+            context.update(role_context)
+
         return context
 
     def get_role_context_data(

tests/test_crud/test_views.py

@@ -395,6 +395,25 @@ def test_get_role_context_data_nonexistent(role):
     assert result == {}
 
 
+@pytest.mark.parametrize(
+    "role",
+    [
+        Role.DETAIL,
+        Role.LIST,
+        Role.CREATE,
+        Role.UPDATE,
+        Role.DELETE,
+    ],
+)
+def test_get_context_data_role_method_nonexistent(role):
+    view = BookmarkView()
+    view.role = role
+
+    view.get_context_data()
+
+    assert True
+
+
 @pytest.mark.parametrize(
     "role",
     [