An object-relational mapping (ORM) case scenario.
对象-关系映射(ORM)案例场景。
See Resources for more information on issues around object-relational mapping.
有关对象关系映射的问题的更多信息，请参见参考资料。
However, for many years, many popular DBMSs have been hybrid object-relational.
不过，许多年来，很多流行的DBMS都是对象和关系的混合体。
Either way, you have to write or generate code to do the object-relational mapping.
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。
The object Contact is the ActiveRecord object-relational mapping that the model provides.
对象Contact是模型所提供的ActiveRecord对象-关系映射。
Gone are the days of writing your own object-relational mapping (ORM), logging, or testing framework.
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。
The query syntax is part of Erlang itself, while the data model is akin to an object-relational DBMS.
查询语法是Erlang的一部分，数据模型类似于对象-关系数据库管理系统。
It does not store documents as plain text and does not map XML to relational or object-relational tables.
它不将文档存储为纯文本，也不将XML映射到关系或对象关系表。
I'll start by describing what an object-relational mapper (ORM) is and how to create a one-to-many relationship.
我将首先介绍什么是对象关系映射器(object - relationalmapper,ORM)，以及如何创建一对多关系。
The service persists order information in a relational database using an object-relational mapping framework.
服务使用ORM框架将订单信息持久化到关系数据库里。
You can think of XMLBeans as an object-relational (or) mapper — but for XML files rather than relational databases.
可以将XMLBeans看作对象-关系(OR)映射器，但这是针对XML文件而非关系数据库而言的。
Hibernate is one of most popular object-relational mapping (ORM) engines providing data persistence and query services.
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。
It goes further by mentioning that it could be any type of database: relational (object-relational) or non-relational.
并且还进一步提到可以是任何类型的数据库：关系(对象-关系)或非关系的。
Django comes with its own object-relational mapper (ORM) library that supports dynamic database access through a Python object interface.
Django提供了自己的对象关系型数据映射组件(object - relationalmapper,orm)库，它可以通过Python对象接口支持动态数据库访问。
Rails USES the ActiveRecord library to handle database access and object-relational mapping between database tables and Ruby object models.
Rails使用activerecord库处理数据库访问及数据库表与Ruby对象模型之间的对象关系映射。
Part 1 of this two-article series covers several basic best practices for Hibernate and object-relational mapping (ORM) tools in general.
本系列包含两篇文章，第1部分讨论了Hibernate和其他对象-关系映射(ORM)工具的几个基本最佳实践。
Follows the named-query style, targeted to match or exceed the capabilities of existing object-relational mappers and persistence solutions.
遵从命名查询的风格，目标是等同或超过现有对象-关系映射器和持久化解决方案的功能。
then why can't we use XML as our first class data and programming model, given all the problems we learned the hard way with object-relational or OX mapping?
那么，考虑到我们在使用对象关系或OX映射的过程中发现的种种问题，为什么我们不能使用XML作为首选数据与编程模型呢？
This article assumes that you're familiar with basic EJB 3.0 and object-relational (or) mapping concepts (see Resources for more information on both subjects).
本文假设您熟悉EJB 3.0基本概念和对象关系(OR)映射基本概念。(若需了解这两个主题的更多信息，请参阅参考资料)。
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.
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。
Another limitation of local transactions is that you cannot use them with traditional object-relational mapping (ORM) frameworks such as Hibernate, TopLink, or OpenJPA.
本地事务的另一个限制是不能将它们与传统的关系对象映射(ORM)框架，比如Hibernate、TopLink或OpenJPA，一起使用。
Unfortunately, because of this, we could not reuse the code we were using from EJB2 CMP ORM, so we needed to manually code the object-relational mapping for the JDBC queries.
不幸的是，我们因此不能重用在 EJB2CMPORM 中使用的代码，所以我们需要手动地编写用于JDBC查询的对象关系映射。
Stonebraker was looking to achieve this capability by applying OO principles in working on an object-relational DBMS (ORDBMS), which resulted in the emergence of Illustra in 1994.
Stonebraker 寻求通过在处理对象关系型 DBMS (ORDBMS) 时应用OO原则来实现该功能，这引发了 1994 年 Illustra的出现。
Proper care must be taken to ensure that object-relational database mappings are correct, and ideally the code should be designed to minimize the changes necessary when requirements change.
必须注意确保对象到关系数据库映射的正确性，理想情况下，应该将代码设计成在需求变更时所需的更改最小。
The Session object provides the programmer with a transient storage layer, much like those found in traditional object-relational mapping tools, and also serves as a link to a particular workspace.
Session对象为程序员提供了一个临时的存储层，它非常像传统的对象关系映射工具中可以看到的层，而且还可以将它看作到特定工作区的连接。
Learning from past support issues, you've noticed that you receive many frantic customer calls related to a problem stemming from incorrect JVM versions and incorrect object-relational mapping (ORM).
从过去的支持问题中，您注意到许多急切的客户电话都与错误的JVM版本和错误的对象关系映射(ORM)所导致的问题有关。
Object-relational mapping for creating models
用于创建模型的对象关系映射
Object-relational mapping is the best solution when you have a legacy schema, perhaps not defined with an object model in mind.
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。
The JPA simplifies object relational mapping and data persistence.
jpa简化了对象关系性映射和数据持续性。
Object Relational Mapping (ORM) solutions are widely used in today's enterprise applications.
对象关系映射(ORM)解决方案在当今企业应用中广为使用。
应用推荐