User viewer aware objects for book page

Plus other refactors for that view

bookwyrm/views/books.py

@@ -8,7 +8,7 @@ from django.core.files.base import ContentFile
 from django.core.paginator import Paginator
 from django.db import transaction
 from django.db.models import Avg, Q
-from django.http import HttpResponseBadRequest, HttpResponseNotFound
+from django.http import HttpResponseBadRequest, Http404
 from django.shortcuts import get_object_or_404, redirect
 from django.template.response import TemplateResponse
 from django.utils.datastructures import MultiValueDictKeyError
@@ -30,25 +30,33 @@ class Book(View):
 
     def get(self, request, book_id, user_statuses=False):
         """info about a book"""
-        user_statuses = user_statuses if request.user.is_authenticated else False
-        try:
-            book = models.Book.objects.select_subclasses().get(id=book_id)
-        except models.Book.DoesNotExist:
-            return HttpResponseNotFound()
-
         if is_api_request(request):
+            book = get_object_or_404(
+                models.Book.objects.select_subclasses(), id=book_id
+            )
             return ActivitypubResponse(book.to_activity())
 
-        if isinstance(book, models.Work):
+        user_statuses = user_statuses if request.user.is_authenticated else False
-            book = book.default_edition
+
+        try:
+            book = models.Edition.viewer_aware_objects(request.user).filter(id=book_id)
+        except models.Edition.DoesNotExist:
+            book = (
+                models.Edition.viewer_aware_objects(request.user)
+                .filter(
+                    parent_work__id=book_id,
+                )
+                .order_by("-edition_rank")
+            )
+        book = book.select_related("parent_work").prefetch_related("authors")
+        book = book.first()
+
         if not book or not book.parent_work:
-            return HttpResponseNotFound()
+            raise Http404
 
-        work = book.parent_work
+        # all reviews for all editions of the book
-
-        # all reviews for the book
         reviews = privacy_filter(
-            request.user, models.Review.objects.filter(book__in=work.editions.all())
+            request.user, models.Review.objects.filter(book__parent_work__editions=book)
         )
 
         # the reviews to show

bookwyrm/views/shelf.py

@@ -49,10 +49,14 @@ class Shelf(View):
             FakeShelf = namedtuple(
                 "Shelf", ("identifier", "name", "user", "books", "privacy")
             )
-            books = models.Edition.viewer_aware_objects(request.user).filter(
+            books = (
-                # privacy is ensured because the shelves are already filtered above
+                models.Edition.viewer_aware_objects(request.user)
-                shelfbook__shelf__in=shelves.all()
+                .filter(
-            ).distinct()
+                    # privacy is ensured because the shelves are already filtered above
+                    shelfbook__shelf__in=shelves.all()
+                )
+                .distinct()
+            )
             shelf = FakeShelf("all", _("All books"), user, books, "public")
 
         if is_api_request(request):