在这种情况下如何设置与fluent api的一对一关系?(EF6) [英] How to set the one-to-one relationship with fluent api in this case? (EF6)

问题描述

我有这两个实体:

    public partial class Ficheros
        {
            public Guid Idfichero { get; set; }
            public long Iddocumento { get; set; }
            public byte[] Fichero { get; set; }

            public virtual Documentos IddocumentoNavigation { get; set; }
        }

public partial class Documentos
    {
        public Documentos()
        {
            ElementosDocumentos = new HashSet<ElementosDocumentos>();
        }

        public long Iddocumento { get; set; }
        public string Nombre { get; set; }
        public long? IdtipoDocumento { get; set; }
        public string Codigo { get; set; }
        public decimal? Espacio { get; set; }
        public string Unidades { get; set; }
        public long? Bytes { get; set; }

        public virtual ICollection<ElementosDocumentos> ElementosDocumentos { get; set; }
        public virtual Ficheros Ficheros { get; set; }
        public virtual DocumentosTipos IdtipoDocumentoNavigation { get; set; }
    }

在数据库中，IDFichero 是一个唯一标识符，而在 Documentos 中，IDDocumento 是一个大的 int 自动增量.主表是 Documentos，它只有一个 fichero，它是必需的.

In the database, IDFichero is an uniqueidentifier and in Documentos the IDDocumento is a big int autoincrement. The main table is Documentos, that has one and only one fichero, and it is requiered.

我看到的例子，它会让我认为 IDFichero 是 IDDocumento，但要在数据库中存储文件，我需要 ID 是唯一标识符.

The examples that I have seen, it would make me that IDFichero was IDDocumento, but to store a file in the database I need that the ID is a uniqueidentifier.

谢谢.

推荐答案

你用 EF 术语描述的关系是一对一的 FK 关联，需要两端，Documentos 是 principal 和 Ficheros 从属.

The relationship you are describing in EF terms is one-to-one FK association with both ends required, Documentos being the principal and Ficheros the dependent.

EF 不支持此类关联的显式 FK，因此首先要删除 Ficheros.Iddocumento 属性:

EF does not support explicit FK for this type of association, so start by removing the Ficheros.Iddocumento property:

public partial class Ficheros
{
    public Guid Idfichero { get; set; }
    public byte[] Fichero { get; set; }

    public virtual Documentos IddocumentoNavigation { get; set; }
}

然后使用以下流畅的配置:

then use the following fluent configuration:

modelBuilder.Entity<Documentos>()
    .HasRequired(e => e.Ficheros)
    .WithRequiredPrincipal(e => e.IddocumentoNavigation)
    .Map(m => m.MapKey("Iddocumento"));

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