foreign key association的意思|示意

To represent the above foreign key relationship in Ruby on Rails, you will have to create an association between the models.

你需要在模型之间创建关联才能够在Ruby on Rails中表示外键。

Each one-to-one association is buried as a foreign key in the table of either class.

每个一对一的关联在表中任一类中充当外键。

For this example, consider the creation of a foreign key for every association end to occur with a multiplicity of "one". As a consequence, two things may occur.

具体到本例，考虑所有关联结尾的外键的建立都带有多重性“1”。

When we are able to relate without ambiguity any association end to a foreign key, we can apply the correspondence to specify to which primary key the foreign key refers.

当我们能够清楚无二义地联系任何关联结尾和外键时，我们可以把通讯应用于指明外键指向的是哪个主键。

Each one-to-many association is buried as a foreign key in the table of the many class.

每个一对多的关联在表中多个类中充当外键。

A one-to-one association is mapped to a foreign key buried in one of the tables (no matter which)?

一个一对一关联被映射到表中的一个外键(无所谓哪个)？