Case_accounting/CaseAccounting/CaseAccountingDataBaseImplement/Models/Contract.cs

using CaseAccountingContracts.BindingModels;
using CaseAccountingContracts.ViewModels;
using CaseAccountingDataModels.Models;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CaseAccountingDataBaseImplement.Models
{
    public class Contract : IContractModel
    {
        public int Id { get; set; }

        [Required]
        public string Service { get; set; } = string.Empty;

        [Required]
        public decimal Coast { get; set; }

        [Required]
        public DateTime Date { get; set; }

        [Required]
        public int UserId { get; set; }

        public virtual User User { get; set; } = new();

        [ForeignKey("ContractId")]
        public virtual List<LawyerContracts> LawyerContracts { get; set; } = new();

        [ForeignKey("ContractId")]
        public virtual List<DealContract> DealContracts { get; set; } = new();

        public static Contract? Create(ContractBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            return new Contract()
            {
                Id = model.Id,
                Service = model.Service,
                Coast = model.Coast,
                Date = model.Date,
                UserId = model.UserId
            };
        }

        public void Update(ContractBindingModel? model)
        {
            if (model == null)
            {
                return;
            }
            Service = model.Service;
            Coast = model.Coast;
            Date = model.Date;
        }

        public ContractViewModel GetViewModel => new()
        {
            Id = Id,
            Service = Service,
            Coast = Coast,
            Date = Date,
            UserId = UserId
        };
    }
}