这是一个主要的职员表的实体,而迁移外键变成唯一,不允许在表中重复的值。
我需要添加多个数据在exitdetail
实体,所以我创建从员工表到ExitDetailEntity
表的外键引用一个员工,但外键成为唯一键的同时迁移,而不是让重复。
public class EmployeeDetailEntity : Entity
{
[Required]
[StringLength(12)]
public string EmployeeId { get; set; }
[Required]
[StringLength(64)]
public string FirstName { get; set; }
[StringLength(64)]
public string MiddleName { get; set; }
[StringLength(256)]
public string FullName { get; set; }
[StringLength(64)]
public string LastName { get; set; }
}
此表由EmployeeDetail外键参考
public class ExitDetailEntity : Entity
{
public int EmployeeDetailId {get; set; }
public EmployeeDetailEntity EmployeeDetail {get; set; }
public ExitStatusEnum ExitStatus {get; set;}
}
此表由ExitDetil表的引用
public class ExitDetailAdminEntity : Entity
{
public int ExitDetailId {get; set; }
public ExitDetailEntity ExitDetail {get; set; }
public bool HasTaskCompleted {get; set;}
}
这是在exitdetail称为枚举
public enum ExitStatusEnum
{
Active = 0,
Resigned = 1,
Requested = 2,
Cancelled = 3
}
这是exitdetailentity表迁移命令
migrationBuilder.CreateTable(
name: "ExitDetail",
columns: table => new
{
Id = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
CreatedBy = table.Column<string>(maxLength: 32, nullable: false),
CreatedAt = table.Column<DateTime>(nullable: false),
ModifiedBy = table.Column<string>(maxLength: 32, nullable: true),
ModifiedAt = table.Column<DateTime>(nullable: true),
RowVersion = table.Column<byte[]>(rowVersion: true, nullable: true),
IsDeleted = table.Column<bool>(nullable: false),
EmployeeDetailId = table.Column<int>(nullable: false),
RequestStatus = table.Column<int>(nullable: false),
ApprovalStatus = table.Column<int>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_ExitDetail", x => x.Id);
table.ForeignKey(
name: "FK_ExitDetail_EmployeeDetail_EmployeeDetailId",
column: x => x.EmployeeDetailId,
principalTable: "EmployeeDetail",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
这是唯一的指标正在逐步成为现实行
migrationBuilder.CreateIndex(
name: "IX_ExitDetail_EmployeeDetailId",
table: "ExitDetail",
column: "EmployeeDetailId",
unique: true);
这里是我的onmodelcreating方法里面的代码
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<LocationCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<OfficeCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<DivisionCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<RoleCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<TeamCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<FunctionCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<DesignationCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<LevelCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<ShiftCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<RegularizationTypeCodeTable>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder.Entity<EmployeeDetailEntity>().HasQueryFilter(x => !x.IsDeleted);
modelBuilder
.Entity<EmployeeDetailEntity>()
.HasOne(x => x.ManagerRef)
.WithMany()
.OnDelete(DeleteBehavior.Restrict);
modelBuilder
.Entity<EmployeeDetailEntity>()
.HasIndex(x => x.EmployeeId)
.IsUnique();
modelBuilder
.Entity<EmployeeDetailEntity>()
.HasIndex(x => x.DomainName);
}
您需要定义主键对于每个相关的实体,例如:
public class ExitDetailEntity : Entity
{
public int Id {get; set; } //primary key
public int EmployeeDetailId {get; set; }
public EmployeeDetailEntity EmployeeDetail {get; set; }
public ExitStatusEnum ExitStatus {get; set;}
}
然后,所有其他属性将不会是唯一的。
你可以看到:https://docs.microsoft.com/en-us/ef/core/modeling/keys