ef-code-first 与 tinyint 主键迁移的一对多关系失败

Question

我正在使用 Entity Framework Code-First，我是新手。这是我的模型：

public class Tbl_Organization_Type
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public byte fld_organization_type_id { get; set; }

    [MaxLength(100)]
    public string fld_organization_type_name { get; set; }

    public byte? fld_sort { get; set; }

    public ICollection<Tbl_Organization> Tbl_Organization { get; set; }

}



public class Tbl_Organization
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public long fld_organization_id { get; set; }
    public long? fld_organization_parent_id_ref { get; set; }

    [StringLength(500)]
    public string fld_organization_name { get; set; }

    [StringLength(200)]
    public string fld_organization_address { get; set; }

    [ForeignKey("fld_location_id_ref")]
    public Tbl_Personnel_Location Tbl_Personnel_Location { get; set; }

    [ForeignKey("fld_organization_type_id_ref")]
    public Tbl_Organization_Type Tbl_Organization_Type { get; set; }
}

当我添加 ( add-migration personnel_1 -context PersonnelDbContext ) 它给了我以下错误：

The relationship from 'Tbl_Organization.fld_organization_type_id' to 'Tbl_Organization_Type.Tbl_Organization' with foreign key properties {'fld_organization_type_id_ref' : Nullable} cannot target the primary key {'fld_organization_type_id' : byte} because it is not compatible.

Configure a principal key or a set of compatible foreign key properties for this relationship.

Answer 1

这看起来不像是正确的模型（fld_organization_type_id_ref 未显示或输入错误）。 IAC，该字段需要与 Tbl_Organization_Type （字节）的主键类型相同。尝试：

public class Tbl_Organization
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public long fld_organization_id { get; set; }
    public byte? fld_organization_type_id_ref { get; set; }  // This FK needs to match referenced PK type 
    // Are you missing or not showing fld_location_id_ref

    [StringLength(500)]
    public string fld_organization_name { get; set; }

    [StringLength(200)]
    public string fld_organization_address { get; set; }

    [ForeignKey("fld_location_id_ref")]
    public Tbl_Personnel_Location Tbl_Personnel_Location { get; set; }

    [ForeignKey("fld_organization_type_id_ref")]
    public Tbl_Organization_Type Tbl_Organization_Type { get; set; }
}

同样，您需要 show/define 字段 fld_location_id_ref 并将类型与引用匹配 table Tbl_Personnel_Location.

ef-code-first 与 tinyint 主键迁移的一对多关系失败

ef-code-first one-to-many relation with tinyint primary key migration fails

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