delete orphan plex media sources (#85)

* delete orphan plex media sources

* fix plex db warning on startup

ErsatzTV.Infrastructure/Data/Repositories/MediaSourceRepository.cs

@@ -107,14 +107,19 @@ namespace ErsatzTV.Infrastructure.Data.Repositories
                 .Map(Optional);
         }
 
-        public Task<Option<PlexMediaSource>> GetPlexByLibraryId(int plexLibraryId)
+        public async Task<Option<PlexMediaSource>> GetPlexByLibraryId(int plexLibraryId)
         {
-            using TvContext context = _dbContextFactory.CreateDbContext();
-            return context.PlexMediaSources
+            int? id = await _dbConnection.QuerySingleAsync<int?>(
+                @"SELECT L.MediaSourceId FROM Library L
+                INNER JOIN PlexLibrary PL on L.Id = PL.Id
+                WHERE L.Id = @PlexLibraryId", new { PlexLibraryId = plexLibraryId });
+            
+            await using TvContext context = _dbContextFactory.CreateDbContext();
+            return await context.PlexMediaSources
                 .Include(p => p.Connections)
                 .Include(p => p.Libraries)
-                .Where(p => p.Libraries.Any(l => l.Id == plexLibraryId))
-                .SingleOrDefaultAsync()
+                .OrderBy(p => p.Id)
+                .SingleOrDefaultAsync(p => p.Id == id)
                 .Map(Optional);
         }
 

ErsatzTV.Infrastructure/Migrations/20210319010444_Delete_OrphanPlexMediaSources.cs

@@ -0,0 +1,16 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace ErsatzTV.Infrastructure.Migrations
+{
+    public partial class Delete_OrphanPlexMediaSources : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder) =>
+            migrationBuilder.Sql(
+                @"DELETE FROM MediaSource WHERE Id NOT IN
+                (SELECT Id FROM LocalMediaSource UNION ALL SELECT Id FROM PlexMediaSource)");
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+        }
+    }
+}

ErsatzTV.Infrastructure/Migrations/TvContextModelSnapshot.cs

@@ -14,7 +14,7 @@ namespace ErsatzTV.Infrastructure.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "5.0.3");
+                .HasAnnotation("ProductVersion", "5.0.4");
 
             modelBuilder.Entity(
                 "ErsatzTV.Core.Domain.Artwork",