Entity framework 使用EF Codefirst的查找表

我想先用EF代码创建Resource和RelatedResources表，如下所示：

Table Resource
int Id
string ResourceName
int Category

Table RelatedResource
int ResourceId
int RelatedResourceId

我试了一下，但是 错误：类型“Models.ResourceRelated”的属性“ResourceId”上的ForeignKeyAttribute无效。在依赖类型“Models.ResourceRelated”上找不到导航属性“Resource”。名称值应为有效的导航属性名称

public class ResourceRelated
    {
        [ForeignKey("Resource")]
        public int ResourceId { get; set; }
        public virtual Resource Resoure { get; set; }
        public virtual ICollection<Resource> RelatedResource { get; set; }
    }

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好心的忠告

如果您想要RelatedResource表，那么就需要多对多关系。您可以通过下一种方式实现这一点

public class Resource
{
    public int ResourceId { get; set; }
    public string ResourceName { get; set; }
    public int Category { get; set; }

    [InverseProperty("Resoure")]
    public virtual ICollection<RelatedResource> RelatedResource { get; set; }
    [InverseProperty("ResourceRelated")]
    public virtual ICollection<RelatedResource> ResourceRelated { get; set; }
}

public class RelatedResource
{
    [Key]
    [Column(Order = 1)]
    [ForeignKey("Resoure")]
    public int ResourceId { get; set; }
    [Key]
    [Column(Order = 2)]
    [ForeignKey("ResourceRelated")]
    public int ResourceRelatedId { get; set; }

    public virtual Resource Resoure { get; set; }
    public virtual Resource ResourceRelated { get; set; }
}

但若您想要有资源树，那个么就不需要RelatedResource表

public class Resource
{
    public int ResourceId { get; set; }
    public string ResourceName { get; set; }
    public int Category { get; set; }
    public int? ResourceRelatedId { get; set; }

    public Resource ResourceRelated { get; set; }
    [ForeignKey("ResourceRelatedId")]
    public virtual ICollection<Resource> RelatedResource { get; set; }
}

---

我想获取：Select*from dbo.ResourceDetails，其中ResourceId在Select rr.RelatedResourceId from dbo.ResourceDetails rd内部连接dbo.RelatedResource rr On rd.ResourceId=rr.ResourceId rd.id=1

internal class ResourceConfiguration : EntityTypeConfiguration<Resource>
{
    public ResourceConfiguration()
    {
        HasMany(s => s.ResourceRelated).WithMany(c => c.RelatedResource)
            .Map(cs => { 
                cs.MapLeftKey("ResourceId"); 
                cs.MapRightKey("RelatedResourceId");
                cs.ToTable("RelatedResource"); }
            );
    }
}

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    ///other configuration code
    modelBuilder.Configurations.Add(new ResourceConfiguration());
}

public class Resource
{
    public int ResourceId { get; set; }
    public string ResourceName { get; set; }
    public int Category { get; set; }
    public int? ResourceRelatedId { get; set; }

    public Resource ResourceRelated { get; set; }
    [ForeignKey("ResourceRelatedId")]
    public virtual ICollection<Resource> RelatedResource { get; set; }
}