diff --git a/.gitignore b/.gitignore
index dd1996b..8f967e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 .vscode
 .idea
+.ruff_cache
 
 __pycache__
 
diff --git a/fastapi_book_server/app/services/common.py b/fastapi_book_server/app/services/common.py
index c0c52c6..f6c27d3 100644
--- a/fastapi_book_server/app/services/common.py
+++ b/fastapi_book_server/app/services/common.py
@@ -315,7 +315,7 @@ class GetRandomService(Generic[MODEL, QUERY], BaseService[MODEL, QUERY]):
         cls,
         query: QUERY,
         redis: aioredis.Redis,
-    ) -> int:
+    ) -> int | None:
         cached_object_id = await cls._get_random_object_from_cache(query, redis)
 
         if cached_object_id is not None:
@@ -325,6 +325,9 @@ class GetRandomService(Generic[MODEL, QUERY], BaseService[MODEL, QUERY]):
 
         await cls.cache_object_ids(query, object_ids, redis)
 
+        if len(object_ids):
+            return None
+
         return choice(object_ids)
 
 
diff --git a/fastapi_book_server/app/views/author.py b/fastapi_book_server/app/views/author.py
index 8020882..46dfd67 100644
--- a/fastapi_book_server/app/views/author.py
+++ b/fastapi_book_server/app/views/author.py
@@ -43,6 +43,9 @@ async def get_random_author(
         {"allowed_langs": allowed_langs}, request.app.state.redis
     )
 
+    if author_id is None:
+        raise HTTPException(status.HTTP_204_NO_CONTENT)
+
     return (
         await AuthorDB.objects.select_related(SELECT_RELATED_FIELDS)
         .prefetch_related(PREFETCH_RELATED_FIELDS)
diff --git a/fastapi_book_server/app/views/book.py b/fastapi_book_server/app/views/book.py
index e10ffee..b162220 100644
--- a/fastapi_book_server/app/views/book.py
+++ b/fastapi_book_server/app/views/book.py
@@ -64,6 +64,9 @@ async def get_random_book(
         {"allowed_langs": allowed_langs, "genre": genre}, request.app.state.redis
     )
 
+    if book_id is None:
+        raise HTTPException(status.HTTP_204_NO_CONTENT)
+
     book = (
         await BookDB.objects.select_related(
             SELECT_RELATED_FIELDS + DETAIL_SELECT_RELATED_FIELDS
diff --git a/fastapi_book_server/app/views/sequence.py b/fastapi_book_server/app/views/sequence.py
index b5553f9..b099ddf 100644
--- a/fastapi_book_server/app/views/sequence.py
+++ b/fastapi_book_server/app/views/sequence.py
@@ -1,4 +1,4 @@
-from fastapi import APIRouter, Depends, Request
+from fastapi import APIRouter, Depends, HTTPException, Request, status
 
 from fastapi_pagination import Params
 from fastapi_pagination.ext.ormar import paginate
@@ -34,6 +34,9 @@ async def get_random_sequence(
         request.app.state.redis,
     )
 
+    if sequence_id is None:
+        raise HTTPException(status.HTTP_204_NO_CONTENT)
+
     return await SequenceDB.objects.get(id=sequence_id)