c# - 如何使 Entity Framework 6 使用 SQL SEQUENCE 中的默认值

Question

我创建了以下 SQL 序列

CREATE SEQUENCE SEQ_ORDENES_TRABAJO as int START WITH 1 INCREMENT BY 1 MINVALUE 1 CYCLE ;

在此表中使用的是允许“Consecutivo”字段使用该 SEQUENCE

CREATE TABLE [adm].[OrdenesTrabajo](
    [Id] [uniqueidentifier] NOT NULL,
    [Consecutivo] [int] NOT NULL,
    [FechaIngreso] [datetime] NOT NULL,
    [RemolcadorId] [uniqueidentifier] NOT NULL,
    [Justificacion] [nvarchar](1000) NOT NULL,
    [Prioridad] [smallint] NOT NULL,
    [EstadoMantenimientoId] [uniqueidentifier] NOT NULL,
    [Usuario] [nvarchar](50) NOT NULL,
 CONSTRAINT [PK_adm.OrdenesTrabajo] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [adm].[OrdenesTrabajo] ADD  CONSTRAINT [OT_consecutivoConstraint]  DEFAULT (NEXT VALUE FOR [SEQ_ORDENES_TRABAJO]) FOR [Consecutivo]
GO

这是匹配该表的 Entity Framework 类

[Table("adm.OrdenesTrabajo")]
public class OrdenTrabajo
{
    [Key]
    public Guid Id { get; set; }

    [Required]
    public Int32 Consecutivo { get; set; }

    [Required]
    public DateTime FechaIngreso { get; set; }

    [Required]
    public Guid RemolcadorId { get; set; }

    [Required]
    [MaxLength(1000)]
    public String Justificacion { get; set; }

    [Required]
    public Int16 Prioridad { get; set; }

    [Required]
    public Guid EstadoMantenimientoId { get; set; }

    [Required]
    public String Usuario { get; set; }

    [ForeignKey("RemolcadorId")]
    public Equipo Remolcador { get; set; }

    [ForeignKey("EstadoMantenimientoId")]
    public EstadoMantenimiento EstadoMantenimiento { get; set; }
}

当我使用在 INSERT 命令中省略“Consecutivo”字段的脚本时，它按预期工作并从 SEQUENCE 中获取值。

如何让 Entity Framework 6 在插入实体时使用“Consecutivo”列的默认值？

创建带有 INSERT 子句的存储过程并从 Entity Framework 调用它是我唯一的选择吗？

Answer 1

原来我需要的是一行指定DatabaseGenerated列

    [Required]
    [DatabaseGenerated(DatabaseGeneratedOption.Computed)]
    public Int32 Consecutivo { get; set; }