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所以我试图从 EF 覆盖 DbSet，但它没有像我想象的那样工作。

成员“IQueryable.Provider”尚未在“RequestedDocumentDbSet”类型上实现

我只想覆盖RemoveandRemoveRange方法。这不可能吗？我必须覆盖所有内容吗？

如果是这样，是否有更好的解决方案来做到这一点？

这是 2 个对象的模型：

public class RequestedDocument
{
    [DataMember]
    public int Id { get; set; }

    [ForeignKey("UploadedDocument")]
    [DataMember]
    public int? UploadedDocumentId { get; set; }

    public UploadedDocument UploadedDocument { get; set; }

    //some other properties
}

public class UploadedDocument
{
    public int Id { get; set; }
    public Byte[] Bytes { get; set; }

    [DataMember]
    [NotMapped]
    public string FileName { get; set; }
}


    public class RequestedDocumentDbSet : DbSet<RequestedDocument>
    {
        private readonly ApplicationDbContext _context;

        public RequestedDocumentDbSet()
        {
        }

        public RequestedDocumentDbSet(ApplicationDbContext context):base()
        {
            _context = context;
        }

        public override RequestedDocument Remove(RequestedDocument entity)
        {
            if (entity.UploadedDocumentId != null)
            {
                UploadedDocument uploadedDocument =  new UploadedDocument {Id = entity.UploadedDocumentId.Value};

               // base.Attach()
            }
            return base.Remove(entity);
        }
    }

我的数据库上下文依次如下所示：

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public RequestedDocumentDbSet RequestedDocuments { get; set; }
    public DbSet<UploadedDocument> UploadedDocuments { get; set; }
}

如您所见，RequestedDocument对UploadedDocument.

我需要覆盖的原因是，我可以删除一个子对象，而无需将其加载到内存中，也不必在整个地方提供此代码，而是在一个集中的地方提供。

我想要的是每次 aRequestedDocument被删除时也UploadedDocument被删除。

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