如何使用可移植类库和EF Code-first? [英] How to work with Portable Class Library and EF Code-first?

问题描述

我正在做一个Windows Phone应用程序，其中在Azure中运行WebApi.

I'm doing an Windows Phone app where I have a WebApi running in Azure.

我正在为我的模型"项目使用新的便携式类库"(http://msdn.microsoft.com/en-us/library/gg597391.aspx)，这是我的WebApi项目之间共享的原因(这是一个常规的ASp.NET MVC 4项目)和我的Windows Phone项目.

I'm using the new "Portable Class Library" (http://msdn.microsoft.com/en-us/library/gg597391.aspx) for my "Models" project which is of cause shared between my WebApi project (this is a normale ASp.NET MVC 4 project) and my Windows Phone project.

这很好用，并且可以根据需要对模型(POCO)类进行序列化和反序列化.

This works great and the model (POCO) classes are serialized and deserialized just as I want.

现在，我想开始存储一些Models/POCO对象，并希望使用EF Code-first，但这是一个问题，因为我无法将EntityFramework程序集添加到便携式类库"中项目，实际上我也不想这样做，因为在我的Models项目中只需要一小部分(属性).

Now I want to start storing some of my Models/POCO objects and would like to use EF Code-first for that, but that's kind of a problem as I can't add the EntityFramework assembly to my "Portable Class Library" project, and really I would not like to either as I only need a small part (the attributes) in my Models project.

那么，关于如何采用最佳方法的任何建议?

So, any suggestions to how a approach this the best way?

更新: 好吧，看来我实际上可以将EntityFramework程序集添加到项目中，但这并不能真正帮到我，因为我需要使用的属性存在于System.ComponentModel.DataAnnotations中，而该类在Windows Phone上无法使用. 还有建议吗?

UPDATE: Well, it seems like I can actually add the EntityFramework assembly to the project, but that doesn't really help me, as the attributes I need to use lives in System.ComponentModel.DataAnnotations which can't be used on Windows Phone. Any suggestions still?

推荐答案

不要使用属性.请改用fluent API，并为持久性(EF)创建单独的程序集，该程序集将引用您的模型程序集.持久性程序集将由您的WebAPI层使用.

Don't use attributes. Use fluent API instead and create separate assembly for persistence (EF) which will reference your model assembly. Persistence assembly will be use used by your WebAPI layer.

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