Govor/Govor.Data/Configurations/MessagesConfiguration.cs

using Govor.Core.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace Govor.Data.Configurations;

public class MessagesConfiguration : IEntityTypeConfiguration<Message>
{
    public void Configure(EntityTypeBuilder<Message> builder)
    {
        builder.HasKey(m => m.Id);

        builder.HasMany(m => m.Reactions)
            .WithOne(r => r.Message)
            .HasForeignKey(r => r.MessageId)
            .OnDelete(DeleteBehavior.Cascade);

        builder.HasMany(m => m.MediaAttachments)
            .WithOne(ma => ma.Message)
            .HasForeignKey(ma => ma.MessageId)
            .OnDelete(DeleteBehavior.Cascade);

        builder.HasMany(m => m.MessageViews)
            .WithOne()
            .HasForeignKey(mv => mv.MessageId)
            .OnDelete(DeleteBehavior.Cascade);

        builder.HasOne(m => m.ReplyToMessage)
            .WithMany()
            .HasForeignKey(m => m.ReplyToMessageId)
            .OnDelete(DeleteBehavior.Restrict); 

        builder.Property(m => m.EncryptedContent)
            .IsRequired();
    }
}