问题描述
假设我有一个名为1台产品数据库。所以，我通过数据库优先的方法，并创建VS 2012的EF模型复数和单数选项。
Suppose that I have a database with 1 table named Products. So, I go through the Db First approach and create an EF model in VS 2012 with pluralize and singularize option.
因此，其型号为我创建了一个产品实体，并且默认的命名约定这个实体映射到 dbo.Products 表。
So, the model creates a Product entity for me, and default naming convention maps this entity to the dbo.Products table.
现在我想改变这种行为。其实我是想创建一个自定义的公约地图产品型号实体到 dbo.Products 表。
Now I want to change this behavior. In fact I want to create a custom convention to map ProductModel entity to the dbo.Products table.
这是可能的？如果是这样，怎么样？
Is this possible?! If so, how?
更新：我的目标做...
你知道，当你从更新数据库模型，如果会导致你的模型的变化，自动生成的实体将被覆盖。
As you know, whenever you update your model from database, if it causes a change in your model, the auto-generated entities will be over written.
从另一方面，我想补充的数据注解属性的实体属性，这样我可以用它们来塑造自己的看法，并希望简单地用我的工作一样的DbContext以下插入：
From the other hand, I want to add data annotation attributes to entity properties so that I can use them to shape my views and want to simply work with my DbContext like the following insert:
public ActionResult Create(Product product)
{
if (ModelState.IsValid)
{
db.Products.Add(product);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(product);
}
问题是，我的应用程序的分析未完成和数据库的变化倍至倍。所以，我需要从数据库更新模型，并在此之后，我的所有属性都会删除。
the problem is that my application analysis isn't completed and the database changes times to times. So, I need to update the model from the database and after that, all my attributes will removed.
所以我决定创建一个产品型号类，并复制产品 codeS到它，并通它的意见，视图模型。然后，我whene要查询我的分贝，我会得到一个异常，说， dbo.ProductModels 名称未在数据库中存在...
So I decided to create a ProductModel class and copy the Product codes to it, and pass it the views as view model. Then, whene I want to query my db, I'll get an exception which says that the dbo.ProductModels name is not exist in the db...
在此先感谢
推荐答案
默认情况下，数据库优先的方法总是一个表名映射到同一名称的实体（可能是复数/ singularized）。目前在EF没有规定由公约或工具来调整的。您可以更改/调整/自定义模型 - 但是如果你重新生成，这些更改将丢失。我不知道任何工具/脚本/黑客以某种方式preserve这些变化，并从数据库中重新生成模型后，再应用它们。
By default, a database-first approach will always map a table name to an entity of the same name (possibly pluralized/singularized). There is currently no provision in EF to tweak that by conventions or tooling. You can change/adapt/customize your model - but if you regenerate it, those changes are lost. I'm not aware of any tools/scripts/hacks to somehow "preserve" those changes and re-apply them after regenerating the model from the database.
如果您需要扩展生成的我建议使用的事实，这些都是部分类 - 你可以的延长的在第二个物理文件生成的类：
If you need to extend the generated I'd suggest using the fact that those are partial classes - you can extend the generated class in a second physical file :
在一个单独的文件中写入此，例如 ProductExtension.cs ：
Write this in a separate file, e.g. ProductExtension.cs:
public partial class Product
{
// add your custom methods etc. here
}
这弥补该类这些各种文件将被C＃编译器为你一起合并到一个班
Those various files that make up that class will be merged together into one class by the C# compiler for you.
如果你需要数据的注释添加到现有生成的类，则可以使用MetadataType（..）属性as在这太问题显示其答案的：
If you need to add data annotations to existing generated classes, you can use the MetadataType(..) attribute as shown in this SO question and its answers:
在一个单独的文件中写入此，例如 ProductExtension.cs ：
Write this in a separate file, e.g. ProductExtension.cs:
[MetadataType(typeof(ProductMetaData))]
public partial class Product
{
}
，然后定义元数据/数据注释为你的产品类另一个文件， ProductMetadata.cs ，就像这样：
public class ProductMetaData
{
[Required]
public int RequestId {get;set;}
//...
}
这篇关于如何界定是否EF 5自定义命名约定的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！