In reality, it's up to you to decide whether you want your classes to maintain strict referential integrity (in other words, have all deletes cascade) or to allow a looser relationship.

实际上，您可以自己决定是否希望类保持严格的引用完整性(换句话说，所有删除操作都是级联的)或者允许更松散的关系。

youdao

In reality, it's up to you to decide whether you want your classes to maintain strict referential integrity (in other words, have all deletes cascade) or to allow a looser relationship.

实际上，您可以自己决定是否希望类保持严格的引用完整性(换句话说，所有删除操作都是级联的)或者允许更松散的关系。

youdao