Question

我在ASP.NET（Core 1.0）MVC框架中有以下模型。我正在使用Entity Framework Core。我想创建一个表＆＃34; Deliveries＆＃34;使用同一个表中的两个外键地址（一个接收地址和一个下拉地址）。我的实施是错误的，所以我想问你是否知道：

如何声明这些属性
如何为这些键设置onupdate和ondelete操作？

ApplicationDbContext.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using JBCoreApp.Models;
using Microsoft.EntityFrameworkCore.Metadata;

namespace JBCoreApp.Data
{
    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
            : base(options)
        {
        }

        public DbSet<Country> Countries { get; set; }
        public DbSet<AddressType> AddressTypes { get; set; }
        public DbSet<Address> Addresses { get; set; }
        public DbSet<Profile> Profiles { get; set; }
        public DbSet<VehicleType> VehicleTypes { get; set; }
        public DbSet<LicenseCategory> LicenseCategories { get; set; }
        public DbSet<Driver> Drivers { get; set; }
        public DbSet<DriverLicense> DriverLicenses { get; set; }
        public DbSet<Priority> Priorities { get; set; }
        public DbSet<Sender> Senders { get; set; }
        public DbSet<Status> Statuses { get; set; }
        public DbSet<Vehicle> Vehicles { get; set; }
        public DbSet<Delivery> Deliveries { get; set; }
        public DbSet<DeliveryStatus> DeliveryStatus { get; set; }

        protected override void OnModelCreating(ModelBuilder builder)
        {
            base.OnModelCreating(builder);
            // Customize the ASP.NET Identity model and override the defaults if needed.
            // For example, you can rename the ASP.NET Identity table names and more.
            // Add your customizations after calling base.OnModelCreating(builder);

            builder.Entity<Delivery>()
                .HasOne(a => a.DropOffAddress)
                .WithOne()
                .HasForeignKey<Address>(a => a.Id)
                .OnDelete(DeleteBehavior.Restrict);


            builder.Entity<Delivery>()
                .HasOne(a => a.PickUpAddress)
                .WithOne()
                .HasForeignKey<Address>(a=> a.Id)
                .OnDelete(DeleteBehavior.Restrict);


        }
    } 
}

Address.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace JBCoreApp.Models
{
    [Table("Addresses")]
    public class Address
    {
        public Address()
        {

        }
        [Key]
        public int Id { get; set; }

        public int ProfileId { get; set; }
        public Profile Profile { get; set; }

        public int TypeId { get; set; }
        [ForeignKey("TypeId")]
        public AddressType AddressType { get; set; }

        public string Street { get; set; }
        public string StreetNumber { get; set; }
        public string PostCode { get; set; }
        public string City { get; set; }

        public string CountryId { get; set; }
        public Country Country { get; set; }

        public string Notes { get; set; }
    }
}

Delivery.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Threading.Tasks;

namespace JBCoreApp.Models
{
    [Table("Deliveries")]
    public class Delivery
    {
        public Delivery()
        {

        }

        [Key]
        public int Id { get; set; }

        [Required]
        public int SenderId { get; set; }
        public Sender Sender { get; set; }

        [Required]
        public int VehicleTypeId { get; set; }
        public VehicleType VehicleType { get; set; }

        [Required]
        public int PriorityId { get; set; }
        public Priority Priority { get; set; }

        public int DriverId { get; set; }
        public Driver Driver { get; set; }

        [ForeignKey("PickUpAddressId")]
        public Address PickUpAddress { get; set; }
        public int PickUpAddressId { get; set; }

        [ForeignKey("DropOffAddressId")]
        public Address DropOffAddress { get; set; }
        public int DropOffAddressId { get; set; }

        public DateTime PickUpDateTime { get; set; }
        public DateTime DropOffDateTime { get; set; }
        public DateTime Deadline { get; set; }

        public string Description { get; set; }
        public string Price { get; set; }

        [Timestamp]
        public Byte[] TimeStamp { get; set; }
    }
}

代码优先迁移：引用实体框架核心

0 个答案: