prs/prs.classes/Entities/Bill/BillLine.cs

using System;
using InABox.Core;

namespace Comal.Classes
{
    public class BillLineLink : EntityLink<BillLine>
    {
        [NullEditor]
        public override Guid ID { get; set; }
    }

    [UserTracking(typeof(Bill))]
    public class BillLine : Entity, IPersistent, IRemotable, IOneToMany<Bill>, ITaxable, ILicense<AccountsPayableLicense>
    {
        [EntityRelationship(DeleteAction.Cascade)]
        [NullEditor]
        public BillLink BillLink { get; set; }

        [EntityRelationship(DeleteAction.SetNull)]
        [NullEditor]
        public PurchaseOrderItemLink OrderItem { get; set; }

        [MemoEditor]
        public string Description { get; set; }

        [RequiredColumn]
        public TaxCodeLink TaxCode { get; set; }

        [DoubleEditor(Summary = Summary.Sum)]
        public double ExTax { get; set; }

        [DoubleEditor(Editable = Editable.Hidden)]
        public double TaxRate { get; set; }

        [DoubleEditor(Editable = Editable.Hidden, Summary = Summary.Sum)]
        public double Tax { get; set; }

        [DoubleEditor(Summary = Summary.Sum)]
        public double IncTax { get; set; }

        protected override void Init()
        {
            base.Init();
            BillLink = new BillLink();

            TaxCode = new TaxCodeLink(() => this);
            
            OrderItem = new PurchaseOrderItemLink();
        }

        static BillLine()
        {
            LinkedProperties.Register<BillLine, TaxCodeLink, double>(x => x.TaxCode, x => x.Rate, x => x.TaxRate);            
        }
    }
}