using AutomobilePlantContracts.BindingModels; using AutomobilePlantContracts.ViewModels; using AutomobilePlantDataModels.Models; using System.ComponentModel.DataAnnotations.Schema; using System.ComponentModel.DataAnnotations; namespace AutomobilePlantDatabaseImplement.Models { public class Car : ICarModel { public int Id { get; private set; } [Required] public string CarName { get; private set; } = string.Empty; [Required] public double Price { get; private set; } private Dictionary? _carComponents = null; [NotMapped] public Dictionary CarComponents { get { if (_carComponents == null) { _carComponents = Components.ToDictionary(recPC => recPC.ComponentId, recPC => (recPC.Component as IComponentModel, recPC.Count)); } return _carComponents; } } [ForeignKey("CarId")] public virtual List Components { get; set; } = new(); [ForeignKey("CarId")] public virtual List Orders { get; set; } = new(); public static Car? Create(AutomobilePlantDatabase context, CarBindingModel model) { var components = context.Components; return new Car() { Id = model.Id, CarName = model.CarName, Price = model.Price, Components = model.CarComponents.Select(x => new CarComponent { Component = context.Components.First(y => y.Id == x.Key), Count = x.Value.Item2 }).ToList() }; } public void Update(CarBindingModel model) { CarName = model.CarName; Price = model.Price; } public CarViewModel GetViewModel => new() { Id = Id, CarName = CarName, Price = Price, CarComponents = CarComponents }; public void UpdateComponents(AutomobilePlantDatabase context, CarBindingModel model) { var carComponents = context.CarComponents.Where(rec => rec.CarId == model.Id).ToList(); if (carComponents != null && carComponents.Count > 0) { // удалили те, которых нет в модели context.CarComponents.RemoveRange(carComponents.Where(rec => !model.CarComponents.ContainsKey(rec.ComponentId))); context.SaveChanges(); // обновили количество у существующих записей foreach (var updateComponent in carComponents) { updateComponent.Count = model.CarComponents[updateComponent.ComponentId].Item2; model.CarComponents.Remove(updateComponent.ComponentId); } context.SaveChanges(); } var car = context.Cars.First(x => x.Id == Id); foreach (var pc in model.CarComponents) { context.CarComponents.Add(new CarComponent { Car = car, Component = context.Components.First(x => x.Id == pc.Key), Count = pc.Value.Item2 }); context.SaveChanges(); } _carComponents = null; } } }