Fixed: Don't die on movie refresh when collection has been deleted from TMDB

Fixes #8664

src/NzbDrone.Core/Movies/Collections/AddMovieCollectionService.cs

@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using FluentValidation;
-using FluentValidation.Results;
 using NLog;
 using NzbDrone.Common.EnsureThat;
 using NzbDrone.Core.Exceptions;
@@ -42,6 +39,12 @@ namespace NzbDrone.Core.Movies.Collections
             }
 
             newCollection = AddSkyhookData(newCollection);
+
+            if (newCollection == null)
+            {
+                return null;
+            }
+
             newCollection = SetPropertiesAndValidate(newCollection);
 
             _logger.Info("Adding Collection {0}[{1}]", newCollection.Title, newCollection.TmdbId);
@@ -63,10 +66,7 @@ namespace NzbDrone.Core.Movies.Collections
             {
                 _logger.Error("TmdbId {0} was not found, it may have been removed from TMDb.", newCollection.TmdbId);
 
-                throw new ValidationException(new List<ValidationFailure>
-                                              {
-                                                  new ValidationFailure("TmdbId", $"A collection with this ID was not found.", newCollection.TmdbId)
-                                              });
+                return null;
             }
 
             collection.ApplyChanges(newCollection);

src/NzbDrone.Core/Movies/Collections/MovieCollectionService.cs

@@ -122,6 +122,11 @@ namespace NzbDrone.Core.Movies.Collections
 
                 var collection = FindByTmdbId(collectionTmdbId);
 
+                if (collection == null)
+                {
+                    continue;
+                }
+
                 _repo.Delete(collection.Id);
 
                 _eventAggregator.PublishEvent(new CollectionDeletedEvent(collection));

src/NzbDrone.Core/Movies/RefreshMovieService.cs

@@ -144,8 +144,11 @@ namespace NzbDrone.Core.Movies
                     RootFolderPath = _folderService.GetBestRootFolderPath(movie.Path).TrimEnd('/', '\\', ' ')
                 });
 
-                movieMetadata.CollectionTmdbId = newCollection.TmdbId;
-                movieMetadata.CollectionTitle = newCollection.Title;
+                if (newCollection != null)
+                {
+                    movieMetadata.CollectionTmdbId = newCollection.TmdbId;
+                    movieMetadata.CollectionTitle = newCollection.Title;
+                }
             }
 
             movieMetadata.AlternativeTitles = _titleService.UpdateTitles(movieInfo.AlternativeTitles, movieMetadata);