From c6f37a916820a957d3fab165cbeaeab18937b4cb Mon Sep 17 00:00:00 2001
From: Bogdan <mynameisbogdan@users.noreply.github.com>
Date: Thu, 11 May 2023 20:17:55 +0300
Subject: [PATCH] Fix saving without changing book edition

---
 src/Readarr.Api.V1/Books/BookController.cs  | 2 +-
 src/Readarr.Api.V1/Books/BookResource.cs    | 4 ++--
 src/Readarr.Api.V1/Books/EditionResource.cs | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/Readarr.Api.V1/Books/BookController.cs b/src/Readarr.Api.V1/Books/BookController.cs
index bd7762d57..935714d7a 100644
--- a/src/Readarr.Api.V1/Books/BookController.cs
+++ b/src/Readarr.Api.V1/Books/BookController.cs
@@ -167,7 +167,7 @@ namespace Readarr.Api.V1.Books
             var model = bookResource.ToModel(book);
 
             _bookService.UpdateBook(model);
-            _editionService.UpdateMany(model.Editions.Value);
+            _editionService.UpdateMany(model.Editions.Value ?? new List<Edition>());
 
             BroadcastResourceChange(ModelAction.Updated, model.Id);
 
diff --git a/src/Readarr.Api.V1/Books/BookResource.cs b/src/Readarr.Api.V1/Books/BookResource.cs
index c8fa6e9f7..19bac16dd 100644
--- a/src/Readarr.Api.V1/Books/BookResource.cs
+++ b/src/Readarr.Api.V1/Books/BookResource.cs
@@ -49,7 +49,7 @@ namespace Readarr.Api.V1.Books
                 return null;
             }
 
-            var selectedEdition = model.Editions?.Value.Where(x => x.Monitored).SingleOrDefault();
+            var selectedEdition = model.Editions?.Value?.SingleOrDefault(x => x.Monitored);
 
             var title = selectedEdition?.Title ?? model.Title;
             var authorTitle = $"{model.Author?.Value?.Metadata?.Value?.SortNameLastFirst} {title}";
@@ -120,7 +120,7 @@ namespace Readarr.Api.V1.Books
 
         public static List<Book> ToModel(this IEnumerable<BookResource> resources)
         {
-            return resources.Select(ToModel).ToList();
+            return resources?.Select(ToModel).ToList();
         }
     }
 }
diff --git a/src/Readarr.Api.V1/Books/EditionResource.cs b/src/Readarr.Api.V1/Books/EditionResource.cs
index 8e76b4130..b142e74d6 100644
--- a/src/Readarr.Api.V1/Books/EditionResource.cs
+++ b/src/Readarr.Api.V1/Books/EditionResource.cs
@@ -109,7 +109,7 @@ namespace Readarr.Api.V1.Books
 
         public static List<Edition> ToModel(this IEnumerable<EditionResource> resources)
         {
-            return resources.Select(ToModel).ToList();
+            return resources?.Select(ToModel).ToList();
         }
     }
 }