rdt-client/server/RdtClient.Data/Data/DataContext.cs

using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using RdtClient.Data.Models.Data;

namespace RdtClient.Data.Data;

public class DataContext : IdentityDbContext
{
    public DataContext(DbContextOptions options) : base(options)
    {
    }

    public DbSet<Download> Downloads { get; set; }
    public DbSet<Setting> Settings { get; set; }
    public DbSet<Torrent> Torrents { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
            
        var cascadeFKs = builder.Model.GetEntityTypes()
                                .SelectMany(t => t.GetForeignKeys())
                                .Where(fk => !fk.IsOwnership && fk.DeleteBehavior == DeleteBehavior.Cascade);

        foreach (var fk in cascadeFKs)
        {
            fk.DeleteBehavior = DeleteBehavior.Restrict;
        }
    }
}