Why Are My Update Statements Not Flushing in Spring Data JPA?

Update Statements Not Flushing?

Spring Data JPA's @Query annotation allows for custom queries to be executed. In the provided code snippet, an @Modifying query is used to update an Admin entity. However, the changes made through this query are not being persisted to the database.

The Role of Flushing

By default, the EntityManager does not automatically flush changes. This means that the changes made through an @Modifying query will only be reflected in the EntityManager's local cache, but they will not be persisted to the database until the EntityManager is explicitly flushed.

Solution: Force Flushing

To ensure that changes made through @Modifying queries are persisted to the database, add the clearAutomatically = true option to the @Modifying annotation. This will force the EntityManager to flush changes automatically after each write operation, ensuring that the database is updated immediately.

Modified Query:

<code class="java">@Modifying(clearAutomatically = true)
@Transactional
@Query("UPDATE Admin SET firstname = :firstname, lastname = :lastname, login = :login, superAdmin = :superAdmin, preferenceAdmin = :preferenceAdmin, address =  :address, zipCode = :zipCode, city = :city, country = :country, email = :email, profile = :profile, postLoginUrl = :postLoginUrl WHERE id = :id")
public void update(@Param("firstname") String firstname, @Param("lastname") String lastname, @Param("login") String login, @Param("superAdmin") boolean superAdmin, @Param("preferenceAdmin") boolean preferenceAdmin, @Param("address") String address, @Param("zipCode") String zipCode, @Param("city") String city, @Param("country") String country, @Param("email") String email, @Param("profile") String profile, @Param("postLoginUrl") String postLoginUrl, @Param("id") Long id);</code>

Additional Considerations:

• Using Transaction Management: Transactions ensure that changes made to the database are atomic and consistent. Surround calls to @Modifying queries with a transaction to ensure that the updates are persisted successfully.
• Using Flush Method: The AndFlush method can also be used to explicitly flush changes to the database. This method can be used after executing any query that modifies the database.

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