Creating the domain class is only half the battle.
创建域类只是成功的一半。
The BlogPost is a domain class specific to our system.
BlogPost是我们系统特定的一个领域类。
In a Grails application, you'd create a domain class for each.
在Grails应用程序中，要为每个元素创建一个域类。
Next, I'll add a tiny bit of behavior to my User domain class.
接下来，我要添加一点点的行为给我的user域类。
Every domain class pairs up with a controller based on the name.
每个域类根据名称与一个控制器配对。
Here is part of a domain class diagram for a deal capture application.
下面是一个交易描述应用程序的部分领域类图。
In this case, the feature and county columns aren't represented in the domain class.
在这种情况下，feature与county列未表示在域类中。
Grails looks for the constraints declarations in the same directory as our domain class.
Grails在领域类相同的目录下查找约束声明。
We refine the domain class model to capture the perspective at this level of abstraction.
我们修改域类模型以捕获在这个抽象层次上的角度。
Table per Type (TPT): This approach suggests a separate table for each domain class.
这个方式，推荐给每一个领域类创建一个单独的表。
That way every new domain class created already has the fields and event closures in place.
这样，新创建域类时它们就有适当的字段和事件闭包。
When asked for the domain class name, enter com.jasonrudolph.ejb3example.entity.EmployeeBean.
当询问领域类名时，输入com.jasonrudolph.ejb3example.entity.EmployeeBean。
You should see the files added (both the domain class and the corresponding integration test).
此时应该看到添加的文件(域类和对应的集成测试)。
As you can see, the unit test for a domain class now (with Grails 1.1) extends GrailsUnitTestCase.
可以看到，现在对一个域类的单元测试(在Grails 1.1中)扩展了GrailsUnitTestCase。
Using auto completion is a fast way to remember what queries are available for a certain domain class.
使用自动完成是记住什么查询可用于特定域类的快捷方法。
This is where you can put the static constraints block that would normally be in the domain class.
该文件中可以放置本应该位于域类中的静态constraints块。
Grails gives you a place to store commonly used methods that transcend any single domain class: services.
Grails为您提供了保存常用方法的位置，并且超越了任何单个的域类：即服务。
Looking back at the source code of the User domain class in Listing 1, clearly no validate method is defined.
回头看一下清单1中user域类的源代码，很明显其中没有定义任何validate方法。
In this version, the domain class (in yellow) includes an interface that defines the semantics of a schedule item.
在此版本中，域类(黄色部分)包含了一个定义日程项目语义的界面。
In the subsequent articles, I made changes to the domain class and never had you go back and regenerate the views.
在随后的文章中，我更改了domain类，但是从未让您再回过头来生成视图。
Note that the GenericDaoHibernateImpl class defines only one constructor that takes a domain class as its argument.
注意，GenericDaoHibernateImpl类仅定义一个构造函数，该构造函数接受域类作为其参数。
For the purposes of this discussion, I prefix all query names with the short (unqualified) name of the domain class.
出于讨论目的，我为所有查询名称都加了域类的短(非限定)名称作为前缀。
The first strategy I'll demonstrate for mapping your domain class to a legacy table is using a static mapping block.
我将示范的第一个将域类映射到遗留表的策略是使用静态mapping块。
This means that every time you create, update, or delete a domain class, the Lucene index is updated accordingly.
这就意味着每当您创建、更新或删除一个domain类时，Lucene索引都会相应更新。
Theses clone classes must have the same name than the Domain class (in a different package) and inherits from LazyGwtPojo.
这些克隆类必须使用和域类本身一样的名字（但两者在不同的包中），并且继承LazyGwtPojo。
For example, when you save a domain class to a mock table, the id field is populated as it would be in a live application.
例如，当您将一个域类保存到模拟表在中时，会像在实际应用程序中一样填充id字段。
In addition to timestamping your domain class, you can tap into four event hooks: beforeInsert, befortUpdate, beforeDelete, and onLoad.
除了给域类添加时间戳，还可以引入4 个事件挂钩：beforeInsert、befortUpdate、beforeDelete和onload。
This method instructs Grails to metaprogram the validation methods onto the specified domain class as it would normally during run time.
此方法指示Grails将验证方法元编程到指定的域类上，就像通常在运行时所做的一样。
This time, however, the failure isn't due to the lack of metaprogramming on a domain class. It's due to the lack of dependency injection.
但是，这次失败并不是因为域类上缺少元编程，而是因为缺少依赖性注入。
Or do you move all the validation code into the services tier, removing it from the domain class that should be the owner of that knowledge?
或者您可以将所有验证代码移入到服务层，然后从应当是该知识所有者的域类中删除它吗？
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