ersatztv/ErsatzTV.Infrastructure/Data/Configurations/ChannelConfiguration.cs

using ErsatzTV.Core.Domain;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace ErsatzTV.Infrastructure.Data.Configurations
{
    public class ChannelConfiguration : IEntityTypeConfiguration<Channel>
    {
        public void Configure(EntityTypeBuilder<Channel> builder)
        {
            builder.ToTable("Channel");

            builder.HasIndex(c => c.Number)
                .IsUnique();

            builder.HasMany(c => c.Playouts) // TODO: is this correct, or should we have one to one?
                .WithOne(p => p.Channel)
                .HasForeignKey(p => p.ChannelId)
                .OnDelete(DeleteBehavior.Cascade);

            builder.HasMany(c => c.Artwork)
                .WithOne()
                .OnDelete(DeleteBehavior.Cascade);

            builder.HasOne(i => i.Watermark)
                .WithMany()
                .HasForeignKey(i => i.WatermarkId)
                .OnDelete(DeleteBehavior.SetNull)
                .IsRequired(false);

            builder.HasOne(i => i.FallbackFiller)
                .WithMany()
                .HasForeignKey(i => i.FallbackFillerId)
                .OnDelete(DeleteBehavior.SetNull)
                .IsRequired(false);
        }
    }
}