v2.5.5

This release includes a big amount of bugfixes.

Specifically, following issues were fixed:

• Embeddable classes are now allowed in inheritance trees 4097
• Removed some object hash collisions caused by entity merging 1465
• Allowed usage of mathematical operators in DQL HAVING clauses 5598
• Fixed cloning of proxies with private properties at multiple inheritance levels 5755
• Entity insertions are correctly cleared when a specific entity is to be cleared 5849
• Corrected hydration of fetch-joins that use composite keys 5762
• Metadata exporters now only export the owning side metadata in a one-to-one relation 5858
• Corrected hydration of JTI entities when NULL is retrieved for a simple_array or json_array field 5989
• Correctly expire L2 cache query caches, based on entity region cache timestamp 6001

Total issues resolved: 18

• 1465: spl_object_hash conflict on Merge
• 4097: DDC-3303: @ORM\Embedded does not work with extending classes
• 4277: DDC-3467: Embeddable in inheritance must currently be protected
• 5598: HAVING clause with variable and *, / math operators
• 5599: Fix #5598 issue with /, * in DQL not translating query components properly
• 5689: Avoid conflicts due to spl_object_hash
• 5755: Error on entity clone for MappedSuperclass fields
• 5762: fetch join using composite key on join entity fails to hydrate correctly
• 5768: Fixes #5755 - Parent class fields are not cloned
• 5776: add functional test and bug fix for issue #5762
• 5849: UnitOfWork#clear() doesn't clear entityInsertions when entityName is passed
• 5850: Clear UnitOfWork#$entityInsertions for specific entityName
• 5858: Exporters should only inspect joinColumns for owning side in bi-directional OneToOne
• 5867: Allow the usage of embedded objects on parent classes
• 5975: Fix hydration after fetch join on entity with composite primary key
• 5989: SimpleObjectHydrator produces wrong values with inheritance table and simple array type
• 6001: Make second level cache query cache rely on entity region timestamp
• 6004: Fix hydration in a joined inheritance with simple array or json array