Fix ImproperlyConfigured for paper-detail in scrobbles API

Same issue as drink-detail: Paper model had a template URL but no API
ViewSet, causing HyperlinkedModelSerializer to fail.

Fix:
- Add PaperSerializer and PaperViewSet to books/api/
- Register PaperViewSet as 'papers' in the DRF router

vrobbler/apps/books/api/serializers.py

@@ -1,4 +1,4 @@
-from books.models import Author, Book
+from books.models import Author, Book, Paper
 from rest_framework import serializers
 
 
@@ -12,3 +12,9 @@ class BookSerializer(serializers.HyperlinkedModelSerializer):
     class Meta:
         model = Book
         fields = "__all__"
+
+
+class PaperSerializer(serializers.HyperlinkedModelSerializer):
+    class Meta:
+        model = Paper
+        fields = "__all__"

vrobbler/apps/books/api/views.py

@@ -14,3 +14,9 @@ class BookViewSet(viewsets.ModelViewSet):
     queryset = models.Book.objects.all().order_by("-created")
     serializer_class = serializers.BookSerializer
     permission_classes = [permissions.IsAuthenticated]
+
+
+class PaperViewSet(viewsets.ModelViewSet):
+    queryset = models.Paper.objects.all().order_by("-created")
+    serializer_class = serializers.PaperSerializer
+    permission_classes = [permissions.IsAuthenticated]

vrobbler/urls.py

@@ -18,7 +18,7 @@ from vrobbler.apps.boardgames.api.views import (
     BoardGameViewSet,
 )
 from vrobbler.apps.books import urls as book_urls
-from vrobbler.apps.books.api.views import AuthorViewSet, BookViewSet
+from vrobbler.apps.books.api.views import AuthorViewSet, BookViewSet, PaperViewSet
 from vrobbler.apps.bricksets import urls as bricksets_urls
 from vrobbler.apps.bricksets.api.views import BrickSetViewSet
 from vrobbler.apps.charts import urls as charts_urls
@@ -113,6 +113,7 @@ router.register(r"channels", ChannelViewSet)
 router.register(r"videos", VideoViewSet)
 router.register(r"authors", AuthorViewSet)
 router.register(r"books", BookViewSet)
+router.register(r"papers", PaperViewSet)
 router.register(r"leagues", LeagueViewSet)
 router.register(r"sports", SportViewSet)
 router.register(r"seasons", SeasonViewSet)