ef7无法检索子集合的子对象的属性

使用Include后跟ThenInclude孩子的孩子属性.子属性可能不会出现在intellisense中ThenInclude,但只是输入它 - 它将按预期编译和操作.

var reg = _context.Registrations
  .Where(r => r.User.UserName == userName)
  .Include(r => r.Acvitities).ThenInclude(a => a.Task)
  .Include(r => r.Activities).ThenInclude(a => a.SomethingElse)
  .FirstOrDefault();
  return reg;