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= 6.4 Migration Guide
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:toc:
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:toclevels: 4
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:docsBase: https://docs.jboss.org/hibernate/orm
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:versionDocBase: {docsBase}/6.4
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:userGuideBase: {versionDocBase}/userguide/html_single/Hibernate_User_Guide.html
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:javadocsBase: {versionDocBase}/javadocs
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This guide discusses migration to Hibernate ORM version 6.4. For migration from
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earlier versions, see any other pertinent migration guides as well.
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* link:{docsBase}/6.3/migration-guide/migration-guide.html[6.3 Migration guide]
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* link:{docsBase}/6.2/migration-guide/migration-guide.html[6.2 Migration guide]
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* link:{docsBase}/6.1/migration-guide/migration-guide.html[6.1 Migration guide]
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* link:{docsBase}/6.0/migration-guide/migration-guide.html[6.0 Migration guide]
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2023-10-12 22:12:11 -04:00
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[[soft-delete]]
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== Soft Delete
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6.4 adds support for soft deletes, using the new `@SoftDelete` annotation.
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See the link:{userGuideBase}#soft-delete[User Guide] for details.
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In previous versions, support for soft-deletes was somewhat implementable using
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a combination of any or all of event-listeners, filters, `@Where`, etc.
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Applications using such implementations are encouraged to switch.
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[[custom-tenant-identifier-type]]
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== Custom tenant identifier type
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The `CurrentTenantIdentifierResolver` and `MultiTenantConnectionProvider` SPIs were generified to support custom tenant identifier types.
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Both types now accept a type parameter that represents the tenant identifier type.
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Methods that were accepting or returning a tenant identifier value of type `String` were changed to use the type variable.
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Applications can migrate by specifying the type parameter `<String>` when extending `CurrentTenantIdentifierResolver`
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or one of the `MultiTenantConnectionProvider` subtypes.
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[[IdGeneratorStrategyInterpreter]]
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== Removed IdGeneratorStrategyInterpreter
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`IdGeneratorStrategyInterpreter` has been deprecated since 6.0 and has been removed to simplify id generator internals.
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