程序包 org.babyfish.jimmer.sql

枚举类 DissociateAction

java.lang.Object

java.lang.Enum<DissociateAction>

org.babyfish.jimmer.sql.DissociateAction

所有已实现的接口:

Serializable, Comparable<DissociateAction>, Constable

public enum DissociateAction
extends Enum<DissociateAction>

Configuration for many-to-one (or one-to-one) associations directly based on foreign keys.

In the following two cases, the parent object will disassociate from the child objects:

• When the parent object is deleted (either physically or logically)
• When the user overrides the parent object using a save command, the collection of child objects in the saved data structure is specified, but does not contain some child objects that already exist in the database, the exists child objects will be deleted (either physically or logically). In this case, each child object will dissociate the grandchild objects.

嵌套类概要

从类继承的嵌套类/接口 java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

枚举常量概要

枚举常量

枚举常量	说明
CHECK	If the deleted parent object has some child objects, throw an exception to prevent the operation.
DELETE	For physical deletion, if the deleted parent object has some child objects, physically delete child objects too.
LAX	Do nothing.
NONE	The default option, it is equivalent to LAX or CHECK according to the global configuration `jimmer.default-dissociate-action-checking`
SET_NULL	If the deleted parent object has some child objects, clear foreign key of child objects.

方法概要

修饰符和类型	方法	说明
static DissociateAction	valueOf(String name)	返回带有指定名称的该类的枚举常量。
static DissociateAction[]	values()	返回包含该枚举类的常量的数组， 顺序与声明这些常量的顺序相同

从类继承的方法 java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

NONE

public static final DissociateAction NONE

The default option, it is equivalent to LAX or CHECK according to the global configuration `jimmer.default-dissociate-action-checking`

LAX

public static final DissociateAction LAX

Do nothing.

For physical deletion, if the foreign key constraint exists, `on delete cascade` is required

This argument can be used config the database-level cascade deletion for foreign key in entity table, for foreign key in middle table, please view JoinTable.cascadeDeletedBySource() and JoinTable.cascadeDeletedByTarget()

CHECK

public static final DissociateAction CHECK

If the deleted parent object has some child objects, throw an exception to prevent the operation.

SET_NULL

public static final DissociateAction SET_NULL

If the deleted parent object has some child objects, clear foreign key of child objects.

DELETE

public static final DissociateAction DELETE

For physical deletion, if the deleted parent object has some child objects, physically delete child objects too.

For logical deletion, if the deleted parent object has some child objects, logically delete child objects too.

Notes: If you hope the child objects should be deleted by database through "on delete cascade" option of foreign key of constraint, please don't let ORM to delete them and LAX should be used

方法详细资料

values

public static DissociateAction[] values()

返回包含该枚举类的常量的数组， 顺序与声明这些常量的顺序相同

返回:

包含该枚举类的常量的数组，顺序与声明这些常量的顺序相同

valueOf

public static DissociateAction valueOf(String name)

返回带有指定名称的该类的枚举常量。 字符串必须与用于声明该类的枚举常量的 标识符完全匹配。（不允许有多余 的空格字符。）

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类没有带有指定名称的常量

NullPointerException - 如果参数为空值