C# 在集合中的每个实体中包括映射表

我有以下表格：

public class Author
{
    public int Id { get; set; }

    [Required]
    public string Name { get; set; }

    public ICollection<Book> Books { get; set; } = new List<Book>();
}

public class Book
{
    public int Id { get; set; }

    [Required]
    public string Title { get; set; }

    public int AuthorId { get; set; }

    public Author Author { get; set; }

    public ICollection<BookBorrower> BookBorrowers { get; set; } = new List<BookBorrower>();
}

public class BookBorrower
{
    public int Id { get; set; }

    public int BookId { get; set; }

    public Book Book { get; set; }

    public int BorrowerId { get; set; }

    public Borrower Borrower { get; set; }

    public DateTime StartDate { get; set; }

    public DateTime? EndDate { get; set; }

    public bool IsBookReturned { get; set; } = false;
}

作者包含其所有的书，但每本书都不包括其bookbookers属性

author.Books.BookBorrowers.Count // that's zero but I have enities in those table for those book.

您需要使用，例如：

var author = await _db.Authors
            .Include(a => a.Books)
            .ThenInclude(b => b.BookBorrowers) //Add this line
            .FirstOrDefaultAsync(a => a.Id == id);

---

您还可以执行

.Include（“Books.bookbookers”）

在one@Chronicle是的，但是这种方法没有类型安全性，所以我永远不会推荐它。天哪，非常感谢你。。。。事实上，我试过使用thenclude，但根据intellisens的说法，没有这样的属性，但当我填写属性的全名时，它就起作用了；o

var author = await _db.Authors
            .Include(a => a.Books)
            .ThenInclude(b => b.BookBorrowers) //Add this line
            .FirstOrDefaultAsync(a => a.Id == id);