问题描述
我在使用Entity Framework 4.1 Code First的ASP.NET MVC 3应用程序中遇到了一个有趣的错误。我有三个类/表依次连接。有一个邀请引用了一个项目，然后引用公司。 当我加载公司并保存一切都很好。项目相同然而，当邀请被编辑和保存时，它会清除公司中的字段。他们都只是空白！
当我编辑项目时，我需要显示公司的一些信息，所以我明确地加载了 .Include（x => x.Company）。当我编辑邀请，我不需要公司，所以我没有打扰包括它。
我会认为，如果对象不是那么EF应该不会有什么理由把它标记为已编辑的，对吗？
中查找内部的更改检测，认为 MainContact 在公司中作为新实体，并将其放入中添加状态上下文。
I'm running into an interesting bug in my ASP.NET MVC 3 application using Entity Framework 4.1 Code First. I have three classes/tables that are joined in sequence. There's an Invitation that has a reference to a Project which then has a reference to Company.
When I load a company and save it everything is fine. Same for projects. However when the invitation gets edited and saved, it wipes out the fields in the company. They're all just blank!
When I edit the project, I need to show some info from the company, so I'm explicitly loading that with .Include(x => x.Company). When I edit the invitation though, I don't need the company so I haven't bothered including it.
I'd think that if the object wasn't ever loaded, then there shouldn't be any reason for EF to flag it as edited, right?
Find which thinks to identify the MainContact in company as a new entity and puts it into Added state into the context.
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