javaspringspring-boottransactionshibernate-5.x

Hibernate Query executed in @RestController out of @Transactional context

i'm writing an application in spring boot 2.0 and in i have a response of an Entity JPA Mapped with nested object dependency.

I load and an entity that is returned to the @RestController and included in response service.

I've noticed that a query executed by hibernate when the object is in controller (out of transactions boundaries) to get nested objects (Lazy defined object reference)

How can it be possibile?

Solution

  • in spring boot Open Session in View is enabled by default.

    you have to disable it in application.properties

    spring.jpa.open-in-view=false

    Because jackson could also try to serialize referenced Lazy defined objects, you need to add jackson datatype for hibernate5 (because you are using spring boot 2)

    @Bean
public Module hibernate5Module() {
    return new Hibernate5Module();
}

    and in your pom.xml

    <dependency>
        <groupId>com.fasterxml.jackson.datatype</groupId>
        <artifactId>jackson-datatype-hibernate5</artifactId>
</dependency>

    without version because it will be taken by spring-boot parent