Closes #13690: List all objects to be deleted

netbox/netbox/views/generic/object_views.py

@@ -2,8 +2,9 @@
 from copy import deepcopy
 
 from django.contrib import messages
-from django.db import transaction
+from django.db import transaction, router
 from django.db.models import ProtectedError
+from django.db.models.deletion import Collector
 from django.shortcuts import redirect, render
 from django.urls import reverse
 from django.utils.html import escape
@@ -334,6 +335,16 @@ def get(self, request, *args, **kwargs):
         obj = self.get_object(**kwargs)
         form = ConfirmationForm(initial=request.GET)
 
+        using = router.db_for_write(obj._meta.model)
+        collector = Collector(using=using)
+        collector.collect([obj])
+        related_objects = {}
+        for model, instance in collector.instances_with_model():
+            # we could ignore the instance == obj so that the list doesnt contain itself...
+            if model.__name__ not in related_objects:
+                related_objects[model.__name__] = []
+            related_objects[model.__name__].append(instance)
+
         # If this is an HTMX request, return only the rendered deletion form as modal content
         if is_htmx(request):
             viewname = get_viewname(self.queryset.model, action='delete')
@@ -343,13 +354,15 @@ def get(self, request, *args, **kwargs):
                 'object_type': self.queryset.model._meta.verbose_name,
                 'form': form,
                 'form_url': form_url,
+                'related_objects': related_objects,
                 **self.get_extra_context(request, obj),
             })
 
         return render(request, self.template_name, {
             'object': obj,
             'form': form,
             'return_url': self.get_return_url(request, obj),
+            'related_objects': related_objects,
             **self.get_extra_context(request, obj),
         })
 

netbox/templates/htmx/delete_form.html

@@ -12,6 +12,18 @@ <h5 class="modal-title">{% trans "Confirm Deletion" %}</h5>
         Are you sure you want to <strong class="text-danger">delete</strong> {{ object_type }} <strong>{{ object }}</strong>?
       {% endblocktrans %}
     </p>
+    {% if related_objects %}
+    <p>
+      This will cause deletion of the following items: <br>
+      {% for model,objects in related_objects.items %} 
+        - {{ model }}:
+        {% for object in objects %}
+          {{ object | linkify }}{% if not forloop.last %}, {% endif %}
+        {% endfor %}
+        <br>
+      {% endfor %}
+    </p>
+    {% endif %}
     {% render_form form %}
   </div>
   <div class="modal-footer">