Invalidate active_shelf when switching editions

bookwyrm/views/books/editions.py

@@ -3,6 +3,7 @@
 import operator
 
 from django.contrib.auth.decorators import login_required
+from django.core.cache import cache as django_cache
 from django.core.paginator import Paginator
 from django.db import transaction
 from django.db.models import Q
@@ -14,6 +15,7 @@
 from bookwyrm import forms, models
 from bookwyrm.activitypub import ActivitypubResponse
 from bookwyrm.settings import PAGE_LENGTH
+from bookwyrm.utils import cache
 from bookwyrm.views.helpers import is_api_request
 
 
@@ -103,4 +105,10 @@ def switch_edition(request):
         readthrough.book = new_edition
         readthrough.save()
 
+    django_cache.delete_many(
+        [
+            f"active_shelf-{request.user.id}-{book_id}"
+            for book_id in new_edition.parent_work.editions.values_list("id", flat=True)
+        ]
+    )
     return redirect(f"/book/{new_edition.id}")