什么是NHibernate的HasOne和参考之间的区别？ [英] What are the differences between HasOne and References in nhibernate?

问题描述

之间有什么 HasOne的差异（）和引用（）在NHibernate的？

What are the differences between HasOne() and References() in nhibernate?

推荐答案

HasOne 创建表你们之间的一个一对一的映射。 引用创建一个典型的关系多到一的关系。

HasOne creates a one-to-one mapping between tables for you. References creates a typical relational many-to-one relationship.

更多定义的：

• 一对一关系意味着，当一个记录存在于一个表，它必须（或可以）具有在其它引用的表1和至多一个记录。 例：的用户表，选项表（一个用户有一组固定的选项）
• 一个多对1关系意味着当一个记录存在于一个表，它可以具有在另一表中的多个相关记录。 例如：的用户表和购买表（一个用户可以做很多购买）

• a one-to-one relationship means that when one record exists in one table, it must (or can) have one and at most one record in the other referenced table. Example: User table and Options table (one user has one fixed set of options)
• a many-to-one relationship means that when one records exists in one table, it can have many related records in another table. Example: User table and Purchase table (one user can do many purchases).

注意：的，我说的的表的，你可以放心地替换成的类或实体的，如你所愿，使用FluentNH时，可以很容易地使用它们互换。

Note: where I say table you can replace that safely with class or entity as you wish, when using FluentNH it's easy to use them interchangeably.

这是更$ P $在这个fluentnhibernate维基文章 pcisely解释说。

This is more precisely explained in this fluentnhibernate wiki article.

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