用于创建模型的对象关系映射
对象-关系映射(ORM)案例场景。
为对象-关系映射创建XM l元数据。
将关系映射到数据库外键。
它不将表关系映射到CMP实体bean关系。
It does not map table relationship to CMP entity bean relationship.
理解这些外键的定义是理解ejb关系映射的关键。
Understanding these foreign-key definitions is key to understanding the mapping of EJB relationships.
对象—关系映射技术允许您将关系数据库映射为对象。
The object relational mapping technology lets you map relational databases to objects.
有关对象关系映射的问题的更多信息，请参见参考资料。
See Resources for more information on issues around object-relational mapping.
JPA是一个用于对象关系映射以及数据支持的简化程序模型。
JPA is a simplified programming model used for object relational mapping and data persistence.
对象关系映射(ORM)解决方案在当今企业应用中广为使用。
Object Relational Mapping (ORM) solutions are widely used in today's enterprise applications.
必须覆盖所有关系映射以确保对获取行为和过渡持久性进行测试。
You must cover all the relationship mappings to make sure fetching behavior and transitive persistence is tested.
无论采取哪种方式，都必须编写或生成代码来进行对象关系映射。
Either way, you have to write or generate code to do the object-relational mapping.
当您仅仅想要使用Hibernate对象关系映射组件时使用。
Use when you only want to use the Hibernate object relational mapping component.
对象关系映射程序对于某些类型的应用程序是重量级的。
Object relational mappers are heavyweight for certain types of applications.
当两个项目之间需要关系映射时，这个特性主要用作一个查询表。
This feature is mainly used as a look up table when relationship mapping is needed between 2 items.
手动编写对象关系映射(ORM)、日志或测试框架的时代已经一去不复返。
Gone are the days of writing your own object-relational mapping (ORM), logging, or testing framework.
但是，只有ProcessServer中的接口映射可以提供关系映射。
But only interface maps in Process Server offer relationship mapping.
简单性是SQLMaps 优于其他框架和对象关系映射工具的最大优点。
Simplicity is the biggest advantage of SQL Maps over other frameworks and object relational mapping tools.
对象Contact是模型所提供的ActiveRecord对象-关系映射。
The object Contact is the ActiveRecord object-relational mapping that the model provides.
对象关系映射是使用遗留模式(可能定义时没有考虑对象模型)时的最佳解决方案。
Object-relational mapping is the best solution when you have a legacy schema, perhaps not defined with an object model in mind.
您可以创建定义这两个逻辑字段间关系的关系映射，然后从映射编辑器对此进行调用。
You can create a relationship map that defines the relationship between these two logical fields and then invoke this from the mapping editor.
Rails将永远不会成为用于企业集成、对象关系映射或全堆栈web服务的工具。
Rails will never be a tool for enterprise integration, object-relational mapping, or full-stack Web services.
“自下而上”方法假设已经有数据库表模式，而需要根据表模式开发一个对象层和对象关系映射。
The “bottom up" approach assumes you already have database table schema and need to develop an object layer and object relational mapping from the table schema.
冗长乏味的JDBC开发导致对象关系映射(ORM)框架的诞生，该框架提供一个数据访问抽象层。
The tedium of JDBC development led to the creation of the object relational mapping (ORM) framework, which provides a data access abstraction layer.
对于习惯于对象关系映射方式(如hibernate)的开发者来说，这显得非常奇怪。
To developers used to the OR mapping approach (with e.g. Hibernate) this may seem very strange.
Hibernate是最流行的对象关系映射(ORM)引擎之一，它提供了数据持久化和查询服务。
Hibernate is one of most popular object-relational mapping (ORM) engines providing data persistence and query services.
用基于 SQL 的模式可以把数据呈现从对象模型映射到关系数据模型，对象关系映射引用了这项技术。
Object relational mapping refers to the technique of mapping the data representation from an object model to a relational data model with a SQL-based schema.
在讨论JACC带来的利弊前，让我们考虑如何将这种关系映射到标准J2EE安全性以及JACC使用。
Let us consider how this maps to standard J2EE security, and then to JACC usage before we look at the trade-offs that come with JACC.
为了应对可能的这种情况，如果在此事务策略中使用对象关系映射(ORM)框架，则应确保使用了版本验证功能。
To deal with this possibility, make sure you use versioning if you are using an object-relational mapping (ORM) framework with this transaction strategy.
考虑这样一个示例：DBA知道问题根源是查询的性能较差，但此查询是由框架生成的，使用了对象关系映射技术。
Consider an example where a DBA knows the problem is a poor-performing query, but that query was generated by a framework, using an object-relational mapping technology.
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