removing scrobble PK on time, allowing duplicates

Selector.CLI/ScrobbleSaver.cs

@@ -77,7 +77,7 @@ namespace Selector
 
                 logger.LogDebug("Pulling currently stored scrobbles");
 
-                var currentScrobblesPulled = GetDbScrobbles();
+                var currentScrobbles = GetDbScrobbles();
 
                 await aggregateNetworkTask;
                 var scrobbles = runRequests.SelectMany(r => r.Scrobbles);
@@ -89,7 +89,7 @@ namespace Selector
                 RemoveNowPlaying(scrobbles.ToList());
 
                 var nativeScrobbles = scrobbles
-                    .DistinctBy(s => s.TimePlayed?.UtcDateTime)
+                    .DistinctBy(s => new { s.TimePlayed?.UtcDateTime, s.Name, s.ArtistName })
                     .Select(s =>
                     {
                         var nativeScrobble = (UserScrobble)s;
@@ -102,7 +102,7 @@ namespace Selector
                 logger.LogDebug("Identifying difference sets");
                 var time = Stopwatch.StartNew();
 
-                (var toAdd, var toRemove) = ScrobbleMatcher.IdentifyDiffs(currentScrobblesPulled, nativeScrobbles);
+                (var toAdd, var toRemove) = ScrobbleMatcher.IdentifyDiffs(currentScrobbles, nativeScrobbles);
 
                 time.Stop();
                 logger.LogTrace("Finished diffing: {0:n}ms", time.ElapsedMilliseconds);

Selector.Model/ApplicationDbContext.cs

@@ -55,7 +55,6 @@ namespace Selector.Model
                 .WithMany(u => u.Watchers)
                 .HasForeignKey(w => w.UserId);
 
-            modelBuilder.Entity<UserScrobble>().HasKey(s => new { s.UserId, s.Timestamp });
             modelBuilder.Entity<UserScrobble>()
                 .HasOne(w => w.User)
                 .WithMany(u => u.Scrobbles)

Selector.Model/Migrations/20220220213329_scrobble_int_id.Designer.cs

@@ -0,0 +1,461 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Selector.Model;
+
+#nullable disable
+
+namespace Selector.Model.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20220220213329_scrobble_int_id")]
+    partial class scrobble_int_id
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("Npgsql:CollationDefinition:case_insensitive", "en-u-ks-primary,en-u-ks-primary,icu,False")
+                .HasAnnotation("ProductVersion", "6.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles", (string)null);
+
+                    b.HasData(
+                        new
+                        {
+                            Id = "00c64c0a-3387-4933-9575-83443fa9092b",
+                            ConcurrencyStamp = "765f8993-a743-496b-8c8a-e43f532ac862",
+                            Name = "Admin",
+                            NormalizedName = "ADMIN"
+                        });
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<string>("RoleId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("RoleId")
+                        .HasColumnType("text");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("text");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens", (string)null);
+                });
+
+            modelBuilder.Entity("Selector.Model.AlbumLastfmSpotifyMapping", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("LastfmAlbumName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("LastfmArtistName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("SpotifyUri")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("AlbumMapping");
+                });
+
+            modelBuilder.Entity("Selector.Model.ApplicationUser", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("LastFmUsername")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("SaveScrobbles")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("text");
+
+                    b.Property<string>("SpotifyAccessToken")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("SpotifyIsLinked")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("SpotifyLastRefresh")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("SpotifyRefreshToken")
+                        .HasColumnType("text");
+
+                    b.Property<int>("SpotifyTokenExpiry")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers", (string)null);
+                });
+
+            modelBuilder.Entity("Selector.Model.ArtistLastfmSpotifyMapping", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("LastfmArtistName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("SpotifyUri")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("ArtistMapping");
+                });
+
+            modelBuilder.Entity("Selector.Model.TrackLastfmSpotifyMapping", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("LastfmArtistName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("LastfmTrackName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("SpotifyUri")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("TrackMapping");
+                });
+
+            modelBuilder.Entity("Selector.Model.UserScrobble", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("AlbumArtistName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("AlbumName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("ArtistName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("TrackName")
+                        .HasColumnType("text")
+                        .UseCollation("case_insensitive");
+
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Scrobble");
+                });
+
+            modelBuilder.Entity("Selector.Model.Watcher", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("Type")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Watcher");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.HasOne("Selector.Model.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.HasOne("Selector.Model.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Selector.Model.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.HasOne("Selector.Model.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Selector.Model.UserScrobble", b =>
+                {
+                    b.HasOne("Selector.Model.ApplicationUser", "User")
+                        .WithMany("Scrobbles")
+                        .HasForeignKey("UserId");
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Selector.Model.Watcher", b =>
+                {
+                    b.HasOne("Selector.Model.ApplicationUser", "User")
+                        .WithMany("Watchers")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("Selector.Model.ApplicationUser", b =>
+                {
+                    b.Navigation("Scrobbles");
+
+                    b.Navigation("Watchers");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Selector.Model/Migrations/20220220213329_scrobble_int_id.cs

@@ -0,0 +1,110 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Selector.Model.Migrations
+{
+    public partial class scrobble_int_id : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Scrobble_AspNetUsers_UserId",
+                table: "Scrobble");
+
+            migrationBuilder.DropPrimaryKey(
+                name: "PK_Scrobble",
+                table: "Scrobble");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "UserId",
+                table: "Scrobble",
+                type: "text",
+                nullable: true,
+                oldClrType: typeof(string),
+                oldType: "text");
+
+            migrationBuilder.AddColumn<int>(
+                name: "Id",
+                table: "Scrobble",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0)
+                .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn);
+
+            migrationBuilder.AddPrimaryKey(
+                name: "PK_Scrobble",
+                table: "Scrobble",
+                column: "Id");
+
+            migrationBuilder.UpdateData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: "00c64c0a-3387-4933-9575-83443fa9092b",
+                column: "ConcurrencyStamp",
+                value: "765f8993-a743-496b-8c8a-e43f532ac862");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Scrobble_UserId",
+                table: "Scrobble",
+                column: "UserId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Scrobble_AspNetUsers_UserId",
+                table: "Scrobble",
+                column: "UserId",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Scrobble_AspNetUsers_UserId",
+                table: "Scrobble");
+
+            migrationBuilder.DropPrimaryKey(
+                name: "PK_Scrobble",
+                table: "Scrobble");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Scrobble_UserId",
+                table: "Scrobble");
+
+            migrationBuilder.DropColumn(
+                name: "Id",
+                table: "Scrobble");
+
+            migrationBuilder.AlterColumn<string>(
+                name: "UserId",
+                table: "Scrobble",
+                type: "text",
+                nullable: false,
+                defaultValue: "",
+                oldClrType: typeof(string),
+                oldType: "text",
+                oldNullable: true);
+
+            migrationBuilder.AddPrimaryKey(
+                name: "PK_Scrobble",
+                table: "Scrobble",
+                columns: new[] { "UserId", "Timestamp" });
+
+            migrationBuilder.UpdateData(
+                table: "AspNetRoles",
+                keyColumn: "Id",
+                keyValue: "00c64c0a-3387-4933-9575-83443fa9092b",
+                column: "ConcurrencyStamp",
+                value: "b91c880d-e280-4a17-a528-d34fdc35f291");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Scrobble_AspNetUsers_UserId",
+                table: "Scrobble",
+                column: "UserId",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+    }
+}

Selector.Model/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -52,7 +52,7 @@ namespace Selector.Model.Migrations
                         new
                         {
                             Id = "00c64c0a-3387-4933-9575-83443fa9092b",
-                            ConcurrencyStamp = "b91c880d-e280-4a17-a528-d34fdc35f291",
+                            ConcurrencyStamp = "765f8993-a743-496b-8c8a-e43f532ac862",
                             Name = "Admin",
                             NormalizedName = "ADMIN"
                         });
@@ -185,7 +185,7 @@ namespace Selector.Model.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("AlbumMapping");
+                    b.ToTable("AlbumMapping", (string)null);
                 });
 
             modelBuilder.Entity("Selector.Model.ApplicationUser", b =>
@@ -291,7 +291,7 @@ namespace Selector.Model.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("ArtistMapping");
+                    b.ToTable("ArtistMapping", (string)null);
                 });
 
             modelBuilder.Entity("Selector.Model.TrackLastfmSpotifyMapping", b =>
@@ -315,16 +315,16 @@ namespace Selector.Model.Migrations
 
                     b.HasKey("Id");
 
-                    b.ToTable("TrackMapping");
+                    b.ToTable("TrackMapping", (string)null);
                 });
 
             modelBuilder.Entity("Selector.Model.UserScrobble", b =>
                 {
-                    b.Property<string>("UserId")
+                    b.Property<int>("Id")
-                        .HasColumnType("text");
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
 
-                    b.Property<DateTime>("Timestamp")
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
-                        .HasColumnType("timestamp with time zone");
 
                     b.Property<string>("AlbumArtistName")
                         .HasColumnType("text");
@@ -337,13 +337,21 @@ namespace Selector.Model.Migrations
                         .HasColumnType("text")
                         .UseCollation("case_insensitive");
 
+                    b.Property<DateTime>("Timestamp")
+                        .HasColumnType("timestamp with time zone");
+
                     b.Property<string>("TrackName")
                         .HasColumnType("text")
                         .UseCollation("case_insensitive");
 
-                    b.HasKey("UserId", "Timestamp");
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
 
-                    b.ToTable("Scrobble");
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("Scrobble", (string)null);
                 });
 
             modelBuilder.Entity("Selector.Model.Watcher", b =>
@@ -365,7 +373,7 @@ namespace Selector.Model.Migrations
 
                     b.HasIndex("UserId");
 
-                    b.ToTable("Watcher");
+                    b.ToTable("Watcher", (string)null);
                 });
 
             modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
@@ -423,9 +431,7 @@ namespace Selector.Model.Migrations
                 {
                     b.HasOne("Selector.Model.ApplicationUser", "User")
                         .WithMany("Scrobbles")
-                        .HasForeignKey("UserId")
+                        .HasForeignKey("UserId");
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
 
                     b.Navigation("User");
                 });

Selector.Model/UserScrobble.cs

@@ -4,6 +4,7 @@ namespace Selector.Model
 {
     public class UserScrobble: Scrobble
     {
+        public int Id { get; set; }
         public string UserId { get; set; }
         public ApplicationUser User { get; set; }