EntityFramework linq查询中的System.NotImplementedException? [英] System.NotImplementedException in EntityFramework linq query?

问题描述

代码:

var query = await _messageGroupRepository.GetAll()
                .Include(x => x.Users)
                .Where(x => x.Users.Any(y => y.Id == 1))
                .OrderByDescending(x => x.Date)
                .Take(5)
                .ToListAsync();

结果: System.NotImplementedException

解决方案?

推荐答案

欢迎使用StackOverflow. NotImplementedException 通常用作尚未实现的方法中的占位符(顾名思义).它很少与生产代码一起出现，而且我认为我从未在成熟的框架或库(如LINQ)中见过它.

Welcome to StackOverflow. The NotImplementedException is typically used as a placeholder in methods which are not yet implemented (as the name suggests). It should rarely occur with production code and I don't think I have ever seen it in a mature framework or library (like LINQ).

在您的情况下，我猜想它是引发异常的存储库中的GetAll()方法(但是您可以检查stacktrace)，因为它是那里唯一的非LINQ方法.

In your case, I would guess that it is the GetAll() method on your repository which throws the exception (but you can check the stacktrace), as it is the only non-LINQ method there.

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