我在.NET Core和EF Core 3.0中拥有其余的API,我遇到了一个奇怪的问题。以下是我的实体。
[Table(name: "BizObjects")]
public class BizObject
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
[Required]
[StringLength(06)]
public int Id { get; set; }
public string Category { get; set; } //FK
[MaxLength(2)]
public int ItemIncrement { get; set; }
[MaxLength(2)]
public int SubItemIncrement { get; set; }
public virtual BizObjectT BizObjectT { get; set; }
}
[Table(name: "BizObjectsT")]
public class BizObjectT
{
[StringLength(02)]
public string Lang { get; set; }
public string Text { get; set; }
#region Primary Key derived from Foreign key for Config tabels
[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
[ForeignKey(name: "BizObjectId")]
[Required]
public int BizObjectId { get; set; }
public virtual BizObject BizObject { get; set; }
#endregion
}
这是我的DbContext。
public class ApplicationContext : DbContext, IDisposable
{
public ApplicationContext(DbContextOptions options)
: base(options: options) { }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<BizObject>()
.HasOne<BizObjectT>(s => s.BizObjectT)
.WithOne(g => g.BizObject)
.HasForeignKey<BizObjectT>(s => s.BizObjectId);
}
public DbSet<BizObject> BizObjects { get; set; }
public DbSet<BizObjectT> BizObjectsT { get; set; }
}
现在,一切正常。我能够创建迁移并将其部署到数据库。我的外键在API中可以正常工作。
但是我遇到的问题是SQL Server。在这里,我无法在实现的关系窗口中找到外键主表。即使尝试手动添加FK,我也看不到该表的状态。
我不确定问题出在哪里,任何建议都会有很大帮助。
谢谢。
更新1:
这里是实体生成的迁移。
public partial class initial : Migration
{
protected override void Up(MigrationBuilder migrationBuilder)
{
migrationBuilder.CreateTable(
name: "BizObjects",
columns: table => new
{
Id = table.Column<int>(maxLength: 6, nullable: false),
Category = table.Column<string>(nullable: true),
ItemIncrement = table.Column<int>(maxLength: 2, nullable: false),
SubItemIncrement = table.Column<int>(maxLength: 2, nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_BizObjects", x => x.Id);
});
migrationBuilder.CreateTable(
name: "BizObjectsT",
columns: table => new
{
BizObjectId = table.Column<int>(nullable: false),
Lang = table.Column<string>(maxLength: 2, nullable: true),
Text = table.Column<string>(nullable: true)
},
constraints: table =>
{
table.PrimaryKey("PK_BizObjectsT", x => x.BizObjectId);
table.ForeignKey(
name: "FK_BizObjectsT_BizObjects_BizObjectId",
column: x => x.BizObjectId,
principalTable: "BizObjects",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
}
protected override void Down(MigrationBuilder migrationBuilder)
{
migrationBuilder.DropTable(
name: "BizObjectsT");
migrationBuilder.DropTable(
name: "BizObjects");
}
}
奇怪的是,如果我更改数据库名称,它将起作用。但仅适用于前几张桌子。
假设我有10个表要迁移,而这个[[BizObject是第一个表,那么更改数据库名称后,SQL将引用BizObject,但没有其他表的引用,这是随机的。
供参考:
Rest API配置:
今天,我将使用SQL Server和SSMS的新版本检查所有这一切,稍后将在此处发布更新...
[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
[ForeignKey(name: "BizObjectId")]
[Required]
public int BizObjectId { get; set; }
public virtual BizObject BizObject { get; set; }
不应该是这样:
[Required] public int BizObjectId { get; set; } [ForeignKey(name: "BizObjectId")] public virtual BizObject BizObject { get; set; }
参见:EF Core Doc我还删除了
[Key]
属性,因为我非常确定它不能同时是键和外键-如果愿意,可以添加唯一索引。或者,如果确实将其用作PK(1:1),则应删除[DatabaseGenerated]
属性,因为在子记录中它不能由DB生成。