Fixed: Edge case where import fails due to DB relationship mismatch

Closes #3243

src/NzbDrone.Core.Test/MediaFiles/EpisodeImport/Specifications/SameFileSpecificationFixture.cs

@@ -3,6 +3,7 @@
 using FluentAssertions;
 using Marr.Data;
 using NUnit.Framework;
+using NzbDrone.Core.Datastore;
 using NzbDrone.Core.MediaFiles;
 using NzbDrone.Core.MediaFiles.EpisodeImport.Specifications;
 using NzbDrone.Core.Parser.Model;
@@ -92,5 +93,18 @@ public void should_be_reject_if_file_size_is_the_same()
 
             Subject.IsSatisfiedBy(_localEpisode, null).Accepted.Should().BeFalse();
         }
+
+        [Test]
+        public void should_be_accepted_if_file_cannot_be_fetched()
+        {
+            _localEpisode.Episodes = Builder<Episode>.CreateListOfSize(1)
+                .TheFirst(1)
+                .With(e => e.EpisodeFileId = 1)
+                .With(e => e.EpisodeFile = new LazyLoaded<EpisodeFile>((EpisodeFile)null))
+                .Build()
+                .ToList();
+
+            Subject.IsSatisfiedBy(_localEpisode, null).Accepted.Should().BeTrue();
+        }
     }
 }

src/NzbDrone.Core/MediaFiles/EpisodeImport/Specifications/SameFileSpecification.cs

@@ -30,6 +30,16 @@ public Decision IsSatisfiedBy(LocalEpisode localEpisode, DownloadClientItem down
                 return Decision.Accept();
             }
 
+            var episodeFile = episodeFiles.First().Value;
+
+            if (episodeFile == null)
+            {
+                var episode = localEpisode.Episodes.First();
+                _logger.Trace("Unable to get episode file details from the DB. EpisodeId: {0} EpisodeFileId: {1}", episode.Id, episode.EpisodeFileId);
+
+                return Decision.Accept();
+            }
+
             if (episodeFiles.First().Value.Size == localEpisode.Size)
             {
                 _logger.Debug("'{0}' Has the same filesize as existing file", localEpisode.Path);