templates: fix OU link in role pages breadcrumb (#54201)

src/authentic2/manager/role_views.py

@@ -144,6 +144,11 @@ export = RolesExportView.as_view()
 class RoleViewMixin(RolesMixin):
     model = get_role_model()
 
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+        ctx['ou'] = self.get_object().ou
+        return ctx
+
 
 class RoleEditView(RoleViewMixin, views.BaseEditView):
     template_name = 'authentic2/manager/role_edit.html'

src/authentic2/manager/templates/authentic2/manager/role_common.html

@@ -6,8 +6,7 @@
 {% block breadcrumb %}
   {{ block.super }}
   <a href="{% url 'a2-manager-roles' %}">{% trans 'Roles' %}</a>
-  {% firstof ou object.ou as current_ou %}
-  {% if multiple_ou and current_ou %}
-    <a href="{% url 'a2-manager-roles' %}?search-ou={{ current_ou.id }}">{{ current_ou }}</a>
+  {% if multiple_ou and ou %}
+    <a href="{% url 'a2-manager-roles' %}?search-ou={{ ou.pk }}">{{ ou }}</a>
   {% endif %}
 {% endblock %}