这一关联还处理一对一和一对多关联。
One-to-one and one-to-many associations are handled by this relation as well.
一个一对多关联被映射到“many ”表的一个外键。
A one-to-many association is specifically mapped to a foreign key in the "many" table.
在一对多关联的情况下，你的转换在所有“ many ”表中建立了一个外键。
In the case of one-to-many relations, your transformation creates a foreign key in every "many" table.
如果使用默认懒加载(lazy)配置的一对多关联，并在表示层中执行同一行代码，size变量的值为0。
If the same line of code executes in the presentation tier, the value of size variable is 0 if the default lazy fetching configuration for one-to-many associations is in use.
这称为一对多关系：一个航线能够与多个旅行关联。
This is called a one-to-many relationship: one airline can have many trips associated with it.
这称为一对多关系：一个航线能够与多个旅行关联。
This is called a one-to-many relationship: one airline can have many trips associated with it.
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