实体框架中的性能问题

Question

我有一些数据库模型：

 public class SomeEntity
    {
        [Key]
        public int Id { get; set; }
        public Schedule Schedule { get; set; }
        public ICollection<Address> Addresses { get; set; }
        public ICollection<Phone> Phones { get; set; }
        public ICollection<Email> Emails { get; set; }
    }

和

public class Schedule
{
    [Key]
    public int id { get; set; }
    public ICollection<TimeRange> Monday { get; set; }
    public ICollection<TimeRange> Tuesday { get; set; }
    public ICollection<TimeRange> Wednesday { get; set; }
    public ICollection<TimeRange> Thursday { get; set; }
    public ICollection<TimeRange> Friday { get; set; }
    public ICollection<TimeRange> Saturday { get; set; }
    public ICollection<TimeRange> Sunday { get; set; }
}

当我跑：

 var entity = _dbContext.SomeEntity
                .Include(p => p.Addresses)
                .Include(p => p.Emails)
                .Include(p => p.Phones)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Monday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Tuesday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Wednesday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Thursday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Friday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Saturday)
                .Include(p => p.Schedule)
                .ThenInclude(s => s.Sunday)
            return entity;

执行需要很长时间。我怎样才能解决这个问题？

Answer 1

你有太多的包括。目前没有选项可以直接对其进行优化（包括过滤器将在下一版本的ef核心2.1中）。如果您确实需要所有这些数据，则应使用rawquery。