So, I have 3 @Entity classes class Campaign { @Id private long campaignId; //Other fields @OneToMany(mappedBy = "campaign",cascade=CascadeType.ALL) private Set<Question> questions; } class Question { @Id private long questionId; //Other fields @OneToMany(mappedBy = "question",cascade=CascadeType.ALL) private Set<Choices> choices; @ManyToOne(fetch=FetchType.LAZY) @JoinColumn(name="CAMPAIGN_ID") private…
I am trying to use this query in springboot so I can display the results in a webpage. I know that this query works because I tested it in postgresql and it gave me the right results. But JPA is…
I'm working on a spring boot project example and I have already created the database but when I configure the database, it doesn't seem to work. It doesn't give me an error though but when I execute the application, nothing…
I am using Springboot JPAs to generate a MySql8 table. It works fine unless I try to use the columndefinition in the Column annotation. @Column(columnDefinition = "boolean default false") private Boolean example; I tried replacing boolean with TINYINT but MySql8…
When I ran spring-boot-2.7, there is no issue. However when I changed code and tailored it to spring-boot-3.0, there is java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest Could someone help me to download the source code and run on your computer? After run it, and…
I have a problem about deploying all spring boot microservices to Kubernetes. I use minikube to open kubernetes dashboard through all these commands shown below. 1 ) minikube start 2 ) minikube dashboard Next, I run kubectl apply -f k8s…
I have a spring-boot application running inside a docker container & its working fine. But the thing is application log file is empty inside the docker container. In logback-spring.xml log path has been configured to /var/log. When I go to…
I have a working setup of Spring boot application connecting to Postgres DB in docker. The same Spring boot application throws an exception when I move it to another docker container. The Postgres docker was unchanged. What might be wrong…
I have a repository class that includes functions with native PostgreSQL queries. Queries are all alike and have the same fashion with below one. @Repository public interface MyEntityRepository extends JpaRepository<MyEntity, Long>, JpaSpecificationExecutor<MyEntity> { ... @Query(value = "SELECT * FROM my_entity…
`HTTP Status 500 – Internal Server Error Type Exception Report Message Request processing failed: java.lang.NullPointerException: Cannot invoke "com.example.repository.StudentRepository.save(Object)" because "this.studentRepository" is null Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception jakarta.servlet.ServletException: Request processing…