Learn how to ignore fields using the JPA @Transient annotation in Java. We'll demonstrate proper usage of the @Transient annotation. We'll also look at its relationship with Java's built-in transient keyword.
When persisting Java objects into database records using an Object-Relational Mapping (ORM) framework, we often want to ignore certain fields. If the framework is compliant with the Java Persistence API (JPA), we can add the @Transient annotation to these fields.
In this tutorial, we'll demonstrate proper usage of the @Transient annotation. We'll also look at its relationship with Java's built-in transient keyword.
There is generally some confusion over the relationship between the @Transient annotation and Java's built-in transient keyword. The transient keyword is primarily meant for ignoring fields during Java object serialization, but it also prevents these fields from being persisted when using a JPA framework.
In other words, the transient keyword has the same effect as the @Transient annotation when saving to a database. However, the @Transient annotation does not affect Java object serialization.
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