Nexus.Reader/src/NexusReader.Infrastructure/Persistence/AppDbContext.cs

using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using NexusReader.Domain.Entities;

namespace NexusReader.Infrastructure.Persistence;

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

    public DbSet<SemanticKnowledgeCache> SemanticKnowledgeCache => Set<SemanticKnowledgeCache>();
    public DbSet<Ebook> Ebooks => Set<Ebook>();

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        modelBuilder.Entity<SemanticKnowledgeCache>(entity =>
        {
            entity.HasKey(e => e.ContentHash);
            entity.HasIndex(e => e.ContentHash).IsUnique();
        });

        modelBuilder.Entity<Ebook>(entity =>
        {
            entity.HasOne(e => e.User)
                .WithMany(u => u.Ebooks)
                .HasForeignKey(e => e.UserId)
                .OnDelete(DeleteBehavior.Cascade);
        });
    }
}