Slight improvement to the move form generation

CHANGELOG.rst

@@ -11,6 +11,9 @@ Next version
   ``feincms3.plugins`` to also accept a (for now optional) context parameter.
   Previously those functions were not directly usable with
   ``RegionRenderer.register``.
+- Move form: Use a potentially restricted ``ModelAdmin.get_queryset`` method
+  instead of the default model manager to generate potential targets.
+- Improved the test coverage a bit.
 
 4.5 (2023-11-01)
 ~~~~~~~~~~~~~~~~

feincms3/admin.py

@@ -236,7 +236,9 @@ def __init__(self, *args, **kwargs):
 
         super().__init__(*args, **kwargs)
 
-        choices = self._generate_choices(self.model._default_manager.with_tree_fields())
+        choices = self._generate_choices(
+            self.modeladmin.get_queryset(self.request).with_tree_fields()
+        )
         self.fields["new_location"] = forms.ChoiceField(
             label=_("New location"),
             widget=forms.RadioSelect,
@@ -339,6 +341,10 @@ def clean(self):
             else:
                 self.instance.parent = data["relative"].parent
 
+        # FIXME feincms3-sites would also require site_id,
+        # feincms3-language-sites would also require language_code to be set
+        # for the cleaning step to work correctly in all cases.
+
         # All fields of model are not in this form
         self.instance.full_clean(
             exclude=[f.name for f in self.model._meta.get_fields()]