Hibernate

723bebcd-f7f3-4008-ad46-1af407bc610f

Hibernate

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Updated5/1/2026

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22 linked nodes

PERTAIN_TOSolution

annotate fields(ex: id) with `sequenceGenerator` not the Entity or class — @Entity @Table(name = "ENTITY") public class ENTITY extends PanacheEntityBase. Tension: those values are inconsistent. Outcome: @Id @SequenceGenerator(name = "ID_SEQ", sequenceName = "ID_SEQ", allocationSize =100) public Integer id;.

PERTAIN_TOProblem

ERROR: relation "aircraft.aircraft" does not exist — When using postman to send a get request to retrieve all aircraft objects. Tension: I believe it stems from my entity design but I am not sure how to go about fixing it. Outcome: you don't have a table/view called 'aircraft' in the schema 'aircraft'.

PERTAIN_TOSolution

set this property in the application.properties file — This can be because the table is not present in your schema in the database. Tension: if the table does not exist then it will create or if the table exists then alter the table. Outcome: spring.jpa.hibernate.ddl-auto= update.

PERTAIN_TOSolution

Use separate entities with one-to-one relations instead of trying to create PersonExtra and PersonBasic with the same primary key

PERTAIN_TOSolution

Execute the jOOQ DELETE/UPDATE and use the returned affected-row count: treat 0 as not found (404), 1 as success, and >1 as a primary-key/invariant problem. Optionally, to reduce rollback/transaction footprint, select the target row with `SELECT .. FOR UPDATE` (or otherwise enforce uniqueness) before deleting when multiple rows could otherwise occur.

PERTAIN_TORootCause

Before persisting the JSON string, Hibernate validates its length against the defined column size (e.g., `VARCHAR(2000)`) — persisting the JSON string. Tension: If the content exceeds this limit, it throws a `Data too long for column` exception. Outcome: Hibernate validates its length against the defined column size.

PERTAIN_TOProblem

Outcome: Use `LONGTEXT` to handle large JSON.

PERTAIN_TOSolution

Use `LONGTEXT` to handle large JSON. Tension: Data too long for column 'value'. Outcome: ALTER TABLE your_table MODIFY COLUMN value LONGTEXT.

PERTAIN_TOAnswer

so-79607411

PERTAIN_TOProblem

Everytime, I encounter the following error — public OrderView createOrder(PostOrderRequest request). Outcome: Removing `orderId(UUID.randomUUID())` from order Builder works like a charm.

PERTAIN_TOSolution

Removing `orderId(UUID.randomUUID())` from order Builder works like a charm. — The error occurs because the `@Id` field (`orderId`) is annotated with `@GeneratedValue(strategy = GenerationType.AUTO)`. Tension: Hibernate automatically generates the value for this field. Outcome: Removing `orderId(UUID.randomUUID())` from order Builder works like a charm.

PERTAIN_TOAnswer

so-79388359

PERTAIN_TORootCause

@OneToOne(fetch = FetchType.LAZY, mappedBy = "person", cascade = CascadeType.DETACH). Tension: changing the CascadeTypes or adding @OnDelete(onDeleteAction=SET_NULL), but nothing is working.

PERTAIN_TOProblem

Either the RfidTag will also get deleted (which I do not want) or I get an error like: org.hibernate.TransientObjectException — If I delete a Person that has an RfidTag. Tension: the assigned RfidTag should not get deleted, it should remain in the database, but the value for person_id should be set to NULL.

PERTAIN_TOAnswer

so-79345946

PERTAIN_TORootCause

the starter guide has references to `URL`, `USER` variables — from the imports, suggests these are available from: `org.hibernate.cfg.AvailableSettings.*`. Tension: However, they are actually located in an inherited class: `org.hibernate.cfg.JdbcSettings`. Outcome: `import org.hibernate.cfg.JdbcSettings._`.

PERTAIN_TOProblem

Unable to get java.sql.Driver from DriverManager — When I try to initiate the database. Tension: I have written a Scala+AKKA api using Scala 3. Outcome: This fixed the above issue, so I'm marking this as resolved.

PERTAIN_TOSolution

This then allowed me to set my config like this: — The starter guide has references to `URL`, `USER` variables when setting the config. Tension: `URL`, `USER` and `PASS` are deprecated. Outcome: `import org.hibernate.cfg.JdbcSettings._`.

PERTAIN_TOAnswer

so-79278011

PERTAIN_TORootCause

or unsaved-value mapping was incorrect. Tension: org.hibernate.StaleObjectStateException. Outcome: Pass custom annotation settings to SequenceStyleGenerator.

PERTAIN_TOProblem

updated from Spring Boot 3.3.6 to version 3.4.0. Tension: musterMetadatenRepository.saveAndFlush(musterEntity); // crashes here. Outcome: org.springframework.orm.ObjectOptimisticLockingFailureException: Row was updated or deleted by another transaction.

PERTAIN_TOAnswer

so-79578099

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