Hibernate
/
hibernate-orm
mirror of https://github.com/hibernate/hibernate-orm
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

fix doc because @AnyKeyJavaClass seems to be required

This commit is contained in:
Gavin 2023-06-01 00:34:55 +02:00 committed by Christian Beikov
parent 4a716b1b81
commit ee0b22f189
2 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
documentation/src/main/asciidoc/introduction/Advanced.adoc
View File

@ -584,6 +584,7 @@ class Order {
... ...
@Any @Any
@AnyKeyJavaClass(UUID.class) //the foreign key type
@JoinColumn(name="payment_id") // the foreign key column @JoinColumn(name="payment_id") // the foreign key column
@Column(name="payment_type") // the discriminator column @Column(name="payment_type") // the discriminator column
// map from discriminator values to target entity types // map from discriminator values to target entity types
@ -612,6 +613,21 @@ There are a number of annotations which are useful to express this sort of compl
Of course, `@Any` mappings are disfavored, except in extremely special cases, since it's much more difficult to enforce referential integrity at the database level. Of course, `@Any` mappings are disfavored, except in extremely special cases, since it's much more difficult to enforce referential integrity at the database level.
There's also currently some limitations around querying `@Any` associations in HQL.
This is allowed:
[source,hql]
----
from Order ord
join CashPayment cash
on id(ord.payment) = cash.id
----
[CAUTION]
====
Polymorphic association joins for `@Any` mappings are not currently implemented.
====
[[bytecode-enhancer]] [[bytecode-enhancer]]
=== Using the bytecode enhancer === Using the bytecode enhancer

1
hibernate-core/src/main/java/org/hibernate/annotations/Any.java
View File

@ -42,6 +42,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
* class Order { * class Order {
* ... * ...
* @Any * @Any
* @AnyKeyJavaClass(UUID.class) //the foreign key type
* @JoinColumn(name="payment_id") //the foreign key column * @JoinColumn(name="payment_id") //the foreign key column
* @Column(name="payment_type") //the discriminator column * @Column(name="payment_type") //the discriminator column
* @AnyDiscriminatorValue(discriminator="CASH", entity=CashPayment.class) * @AnyDiscriminatorValue(discriminator="CASH", entity=CashPayment.class)