Fixed a negative shelf counter bug.

[wolnelektury.git] / apps / catalogue / views.py

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index 6de5a26..60f984a 100644 (file)
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -294,12 +294,15 @@ def remove_from_shelf(request, shelf, book):
     book = get_object_or_404(models.Book, slug=book)
     shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
     
-    models.Tag.objects.remove_tag(book, shelf)
-    
-    shelf.book_count -= 1
-    shelf.save()
-    
-    return HttpResponse('Usunieto')
+    if shelf in book.tags:
+        models.Tag.objects.remove_tag(book, shelf)
+
+        shelf.book_count -= 1
+        shelf.save()
+
+        return HttpResponse('Usunięto')
+    else:
+        return HttpResponse('Książki nie ma na półce')
 
 
 def collect_books(books):