Dotnet 5.0在不包含的情况下引用子实体

public class Blog
{
    public int Id { get; set; }
    public string Title { get; set; }
    public List<Post> Posts { get; set; }
}

public class Post
{
    public int Id { get; set; }
    public string Title { get; set; }
    public string Content { get; set; }
}

public class BlogSummary
{
    public int BlogId { get; set; }
    public string BlogTitle { get; set; }
    public List<PostSummary> Posts { get; set; }
}

public class PostSummary
{
    public int PostId { get; set; }
    public string PostTitle { get; set; }
}

// 在DbContext中使用投影
var blogSummaries = context.Blogs
    .Select(b => new BlogSummary
    {
        BlogId = b.Id,
        BlogTitle = b.Title,
        Posts = b.Posts.Select(p => new PostSummary
        {
            PostId = p.Id,
            PostTitle = p.Title
        }).ToList()
    })
    .ToList();

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Blog>()
        .HasMany(b => b.Posts)
        .WithOne(p => p.Blog)
        .HasForeignKey(p => p.BlogId)
        .OnDelete(DeleteBehavior.Cascade)
        .AsNoTracking(); // 关闭延迟加载
}

var blogs = context.Blogs
    .Include(b => b.Posts)
    .ToList();

var blog = context.Blogs.Find(blogId);
context.Entry(blog).Collection(b => b.Posts).Load();