那我们怎样映射多对多关系呢？
提要与帐户之间存在多对多关系。
There is really a many-to-many relationship between feeds and accounts.
标签的多对多关系的解析的实现？
Implementation of Hashtag many-to-many relationship using parse?
将新参与者添加到给定实例(仅用于多对多关系)。
Add a new participant to a given instance (used for many-to-many relationships only).
JPA支持一对一、一对多、多对一和多对多关系。
JPA supports one-to-one, one-to-many, many-to-one, and many-to-many relationships.
图11中，可以看到如何使用关联表来实现多对多关系。
In Figure 11 you see how to use an associative table to implement a many-to-many relationship.
双向的多对多关系是非常复杂的，在本文中我们不会涉及。
Bidirectional associations are more complex, and we don't cover them in this article.
另一种可能性是限制文档的作用域，以使多对多关系消失。
Another possibility is to limit the scope of the document so that the many-to-many relationship disappears.
在数据库关系图中，添加要在它们之间创建多对多关系的表。
In your database diagram, add the tables that you want to create a many-to-many relationship between.
多对多关系存在于称为categories的元素中。
The many-to-many relationship exists in the element called categories.
标签中的cascade属性用来指明这种多对多关系的联机类型。
The tag's cascade attribute specifies the cascading style to be applied to this association.
因此，基于pub/sub 的服务交互能够支持真正的多对多关系。
Thus, pub/sub-based service interactions can support true many-to-many relationships.
在语义子图层次，描述了每一语义类的对象间的多对多关系及其操作。
While in the level of semantic graph, the model can describe and operate many to many relations of the objects for each class.
一个可能的例外就是“关联表”，用来表示两个表之间的多对多关系。
One possible exception to the rule are the "association tables", used for the many-to-many type of associations between 2 tables.
在语义子图层次，描述了每一语义类的对象间的多对多关系及其操作。
While in the level of semantic graph, the model can describe and operate many to many relations of...
您可以对将一个值映射到多个其他值的查询关系使用一对多或多对多关系。
You can use one-to-many or many-to-many relationships for lookup relationships that map one value to multiple other values.
该问题最简单的解决方案是只要废弃某些多对多关系通常需要通过链接的信息。
The easiest solution to the problem is to simply discard some of the information that would normally need to be linked through a many-to-many relationship.
具体来讲，将创建一个多对多关系，并通过Ajax使用户体验变得自然而有趣。
Specifically, you'll create a many-to-many relationship and use Ajax to make the user experience natural and enjoyable.
另一方面，如果一个作者拥有多本书籍，一本书又有多个作者，就称为多对多关系。
On the other hand, if one author can have multiple books, and one book can also have multiple authors, it's called a many-to-many relation.
除了简单的多对多关系以外，希望您还能从本文了解一些创建多对多关系的出色技巧。
More than the simple mechanics of many-to-many relationships, I hope that you picked up on some of the subtleties of creating them as well.
可能存在对信息的实际约束，该约束证明了分离的逻辑相关的多对多关系的合理性。
There may be practical constrains on information that justify separating logically related many-to-many relationships.
现在数据模型已经就绪，让我们详细查看如何从最终用户的角度创建这些多对多关系。
Now that we have the data model in place, let's take a top-down look at how these many-to-many relationships will be created from the end user's perspective.
之后的“使用Ajax实现多对多关系”教您使用GORM建模越来越复杂的类关系。
Later, in "Many-to-many relationships with a dollop of Ajax," you used GORM to model increasingly sophisticated class relationships.
在Grails的联机文档中，可以找到一对一和多对多关系的示例，请参阅参考资料。
You can find examples of one-to-one and many-to-many relationships in the online Grails documentation; see Resources.
您可能需要使用一个联接表设置一个多对多关系，这需要几个联接来确定某个电影的演员。
You would probably need to set up a many-to-many relationship with a join table, requiring several joins to determine the actors for a particular movie.
<many-to-many>标签中的class属性用来指明多对多关系中的目标类。
The <many-to-many> tag's class attribute specifies the target class for the many-to-many association.
事实是，一旦我完成了所有的问题，这是一个伟大的方式来表示两个实体类型的多对多关系。
The truth is that once I hashed out all the issues, this is a great way to represent two entity types in many-to-many relationship.
有时候，概念数据建模期间表达的关系（特别是多对多关系）在逻辑模型中被显示为实体本身。
Sometimes, relationships expressed during conceptual data modeling (in particular many-to-many relationships) are shown in the logical model as entities themselves.
如果您有关系数据库数据的建模经验，那么您就会知道不同关系实体之间的多对多关系随时会出现。
If you have some experience modeling data for relational databases, you know that many-to-many relationships between different relational entities appear all the time.
当一个维度和一个事实之间有一个隐式的多对多关系时会出现PartialKeyJoins。
Partial Key Joins occur when there is an implicit many to many relationship between a dimension and a fact.
应用推荐