Explanation about detached entities, why occurs the”Detached Entity Passed to Persist” error occurs and how to prevent it.
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Learn how to group multiple constraints under a single, custom annotation to reduce code duplication and improve readability
Learn how to use JPA Specifications to query a table based on one of its associated entities.
Learn about Hibernate’s PropertyValueException. In particular, the “not-null property references a null or transient value” error message.
A quick and practical guide to distinct queries in HQL.
Explore several ways to subtract days from a date object.