DiunaBI/WebAPI/AppDbContext.cs

using Microsoft.EntityFrameworkCore;
using WebAPI.Models;

namespace WebAPI;

public class AppDbContext : DbContext
{
    public DbSet<User> Users { get; init; }
    public DbSet<Layer> Layers { get; init; }
    public DbSet<Record> Records { get; init; }
    public DbSet<ProcessSource> ProcessSources { get; init; }
    // public DbSet<DataInbox> DataInbox { get; set; }

    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<ProcessSource>().HasKey(x => new
        {
            x.LayerId,
            x.SourceId
        });
    }

    private static readonly LoggerFactory MyLoggerFactory =
        new(new[] {
            new Microsoft.Extensions.Logging.Debug.DebugLoggerProvider()
        });

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseLoggerFactory(MyLoggerFactory);
    }
}