Cascade delete notifications for user

BTCPayServer.Data/Data/NotificationData.cs

@@ -26,7 +26,7 @@ namespace BTCPayServer.Data
             builder.Entity<NotificationData>()
                 .HasOne(o => o.ApplicationUser)
                 .WithMany(n => n.Notifications)
-                .HasForeignKey(k => k.ApplicationUserId);
+                .HasForeignKey(k => k.ApplicationUserId).OnDelete(DeleteBehavior.Cascade);
         }
     }
 }

BTCPayServer.Data/Migrations/20200613234439_CascadeDeleteNotificationsForUser.cs

@@ -0,0 +1,41 @@
+using BTCPayServer.Data;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace BTCPayServer.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20200613234439_CascadeDeleteNotificationsForUser")]
+    public partial class CascadeDeleteNotificationsForUser : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Notifications_AspNetUsers_ApplicationUserId",
+                table: "Notifications");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Notifications_AspNetUsers_ApplicationUserId",
+                table: "Notifications",
+                column: "ApplicationUserId",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Notifications_AspNetUsers_ApplicationUserId",
+                table: "Notifications");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Notifications_AspNetUsers_ApplicationUserId",
+                table: "Notifications",
+                column: "ApplicationUserId",
+                principalTable: "AspNetUsers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+    }
+}

BTCPayServer.Data/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -794,7 +794,8 @@ namespace BTCPayServer.Migrations
                 {
                     b.HasOne("BTCPayServer.Data.ApplicationUser", "ApplicationUser")
                         .WithMany("Notifications")
-                        .HasForeignKey("ApplicationUserId");
+                        .HasForeignKey("ApplicationUserId")
+                        .OnDelete(DeleteBehavior.Cascade);
                 });
 
             modelBuilder.Entity("BTCPayServer.Data.PairedSINData", b =>