EF Core Second level ThenInclude missworks

本文介绍了EF Core Second level ThenInclude missworks的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

假设首先使用这些模型：

Assume having these models first:

方法有一个 OriginalCode OriginalCode 有多个 Mutant s Mutant 有很多 ParseSubTree s

Method that has one OriginalCode OriginalCode that has many Mutants Mutant that has many ParseSubTrees

现在查询方法我希望另一个被加载。所以我有以下内容：

Now when querying on Method I want the other being loaded. So I have the following:

Method targetMethod = dBContext.Methods .Include(me => me.OriginalCode) .ThenInclude(oc => oc.Mutants) .FirstOrDefault(me => me.Id == id);

，下一步是另外包含 ParseSubTree 。但问题是我无法访问它。请参阅下图：

and the next step is to include additionally the ParseSubTree. But the thing is that I can't access it. See the following Image:

问题是mu是一个列表而不是一个对象引用！

the problem is "mu is a list instead of being an object reference"!

我的错误在哪里！

TG。

推荐答案

这是一个已知的Intellisense问题，其中包含 ThenInclude 重载对于集合类型导航属性，由在容错案例＃8237中完成缺少lambda参数的成员跟踪 Roslyn GitHub问题。

This is a known Intellisense issue with the ThenInclude overload for collection type navigation properties, tracked by the Completion missing members of lambda parameter in fault tolerance case #8237 Roslyn GitHub issue.

在修复之前，只需输入属性的名称，它就会成功编译并按预期工作。

Until it gets fixed, simply type the name of the property and it will compile successfully and work as expected.

.ThenInclude(mu => mu.ParseSubTrees)