c# - 为 ID EF Core 3.1 创建的重复外键和列

Question

ef core 3.1 为另一个表中的 id 字段创建重复列时遇到问题。我目前有一个继承自 IdentityUser 的 ApplicationUser 实体，以及一个将 ApplicationUser id 存储为 UserId 的属性实体。

 public class Property
    {
        public Guid PropertyId { get; set; }
        public string Name { get; set; }
        public string Description { get; set; }
        public Guid AddressId { get; set; }
        public Address PropertyAddress { get; set; }
        public bool IsHome { get; set; }
        public string UserId { get; set; }
        public ApplicationUser User { get; set; }
    }

public class ApplicationUser : IdentityUser
    {
        public IEnumerable<Property> properties { get; set; }
    }

public class PropertyConfig : IEntityTypeConfiguration<Property>
    {
        public void Configure(EntityTypeBuilder<Property> builder)
        {
            builder.HasKey(p => p.PropertyId);
            builder.HasOne(p => p.PropertyAddress).WithOne();
            builder.HasOne(p => p.User).WithMany(p => p.properties).HasForeignKey(f => f.UserId).OnDelete(DeleteBehavior.Restrict);
        }
    }

 public class ApplicationUserConfig : IEntityTypeConfiguration<ApplicationUser>
    {
        public void Configure(EntityTypeBuilder<ApplicationUser> builder)
        {
            builder.ToTable("User");
            builder.HasKey(p => p.Id);
            builder.HasMany<Property>().WithOne(p => p.User).HasForeignKey(f => f.UserId);
        }
    }

以上是我的类(class)，我已经运行了生成此属性表的迁移。

migrationBuilder.CreateTable(
                name: "Property",
                columns: table => new
                {
                    PropertyId = table.Column<Guid>(nullable: false),
                    Name = table.Column<string>(nullable: true),
                    Description = table.Column<string>(nullable: true),
                    AddressId = table.Column<Guid>(nullable: false),
                    IsHome = table.Column<bool>(nullable: false),
                    UserId = table.Column<string>(nullable: true),
                    ApplicationUserId = table.Column<string>(nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_Property", x => x.PropertyId);
                    table.ForeignKey(
                        name: "FK_Property_Address_AddressId",
                        column: x => x.AddressId,
                        principalTable: "Address",
                        principalColumn: "AddressId",
                        onDelete: ReferentialAction.Cascade);
                    table.ForeignKey(
                        name: "FK_Property_User_ApplicationUserId",
                        column: x => x.ApplicationUserId,
                        principalTable: "User",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Restrict);
                    table.ForeignKey(
                        name: "FK_Property_User_UserId",
                        column: x => x.UserId,
                        principalTable: "User",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Restrict);
                });

如您所见，它正在创建一个 UserId 列和正确的外键。但它也产生了一个 ApplicationUserId，我无法弄清楚是什么导致了它。
任何的想法？
任何帮助，将不胜感激。

Answer 1

在您流畅的 API 配置中

public void Configure(EntityTypeBuilder<ApplicationUser> builder) {
    builder.HasMany<Property>()
        .WithOne(p => p.User)
        .HasForeignKey(f => f.UserId);
}

您只是说 ApplicationUser 之间存在一对多关系。和 Property实体，而不是从多方面涉及哪些成员。确实， Property之间可能存在多个关联。 ApplicationUser .
为了让它工作，通过像这样调整你的配置来指定两端涉及的成员

public void Configure(EntityTypeBuilder<ApplicationUser> builder) {
    builder.HasMany(u => u.properties)
        .WithOne(p => p.User)
        .HasForeignKey(f => f.UserId);
}