chapter-organizer/Data/Configurations/EventDefinitionConfiguration.cs

using Core.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;

namespace Data.Configurations
{
    public class EventDefinitionConfiguration : IEntityTypeConfiguration<EventDefinition>
    {
        public void Configure(EntityTypeBuilder<EventDefinition> builder)
        {
            builder.HasKey(e => e.Id);

            // Indexes
            builder.HasIndex(e => e.Name).IsUnique();
            builder.HasIndex(e => e.EventFormat);

            // Constraints
            builder.Property(e => e.Name)
                .IsRequired()
                .HasMaxLength(128);

            builder.Property(e => e.ShortName)
                .HasMaxLength(50);

            builder.Property(e => e.Description)
                .HasMaxLength(1000);

            builder.Property(e => e.Theme)
                .HasMaxLength(500);

            builder.Property(e => e.Eligibility)
                .IsRequired()
                .HasMaxLength(200);

            builder.Property(e => e.SemifinalistActivity)
                .HasMaxLength(500);

            builder.Property(e => e.Documentation)
                .HasMaxLength(500);

            // Value conversions for enums
            builder.Property(e => e.EventFormat)
                .HasConversion<string>()
                .HasMaxLength(50);
        }
    }
}