DB Cleanup

SVSim.Database/Migrations/20260525203838_AddOwnedEntryUniqueIndexes.cs

@@ -0,0 +1,38 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace SVSim.Database.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddOwnedEntryUniqueIndexes : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_OwnedItemEntry_ViewerId_ItemId",
+                table: "OwnedItemEntry",
+                columns: new[] { "ViewerId", "ItemId" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_OwnedCardEntry_ViewerId_CardId",
+                table: "OwnedCardEntry",
+                columns: new[] { "ViewerId", "CardId" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_OwnedItemEntry_ViewerId_ItemId",
+                table: "OwnedItemEntry");
+
+            migrationBuilder.DropIndex(
+                name: "IX_OwnedCardEntry_ViewerId_CardId",
+                table: "OwnedCardEntry");
+        }
+    }
+}

SVSim.Database/Migrations/SVSimDbContextModelSnapshot.cs

@@ -2228,6 +2228,9 @@ namespace SVSim.Database.Migrations
 
                             b1.HasIndex("CardId");
 
+                            b1.HasIndex("ViewerId", "CardId")
+                                .IsUnique();
+
                             b1.ToTable("OwnedCardEntry");
 
                             b1.HasOne("SVSim.Database.Models.ShadowverseCardEntry", "Card")
@@ -2263,6 +2266,9 @@ namespace SVSim.Database.Migrations
 
                             b1.HasIndex("ItemId");
 
+                            b1.HasIndex("ViewerId", "ItemId")
+                                .IsUnique();
+
                             b1.ToTable("OwnedItemEntry");
 
                             b1.HasOne("SVSim.Database.Models.ItemEntry", "Item")

SVSim.Database/SVSimDbContext.cs

@@ -126,6 +126,21 @@ public class SVSimDbContext : DbContext
         modelBuilder.Entity<PackConfigEntry>().OwnsMany(p => p.Banners);
         modelBuilder.Entity<Viewer>().OwnsMany(v => v.PackOpenCounts);
 
+        // OwnedCardEntry and OwnedItemEntry use composite PK (ViewerId, Id) where Id is auto-
+        // generated, which silently permits multiple rows per (Viewer, Card) or (Viewer, Item).
+        // The intended semantic is one row per pair with Count as multiplicity — enforce that as
+        // a unique index so any future find-or-add that forgets to .Include the collection (and
+        // therefore re-creates a row that already exists in the DB) crashes loudly at SaveChanges
+        // instead of silently duplicating ownership rows.
+        modelBuilder.Entity<Viewer>().OwnsMany(v => v.Cards, b =>
+        {
+            b.HasIndex("ViewerId", "CardId").IsUnique();
+        });
+        modelBuilder.Entity<Viewer>().OwnsMany(v => v.Items, b =>
+        {
+            b.HasIndex("ViewerId", "ItemId").IsUnique();
+        });
+
         modelBuilder.Entity<CardCosmeticReward>(b =>
         {
             b.HasKey(r => new { r.CardId, r.Type, r.CosmeticId });