AX.FireTrainingSys/FireTrainingSys/EntityConfigurations/Template/TemplateOrganizationConfig.cs

using AX.FireTrainingSys.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace AX.FireTrainingSys.EntityConfigurations
{
    public class TemplateOrganizationConfig : IEntityTypeConfiguration<TemplateOrganization>
    {
        public void Configure(EntityTypeBuilder<TemplateOrganization> entity)
        {
            entity.Property(e => e.Id)
                .IsUnicode(false);

            entity.HasKey(e => e.Id);

            entity.HasMany(e => e.Children)
                .WithOne(e => e.Parent)
                .HasForeignKey(e => e.ParentId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasMany(e => e.FireForces)
                .WithOne(e => e.Organization)
                .HasForeignKey(e => e.OrganizationId)
                .OnDelete(DeleteBehavior.Cascade);
        }
    }
}