spring-data-jpa

问题 I need to write a search query on multiple tables in database in spring boot web application. It uses spring data jpa. I know we can write native query in spring data jpa using @Query annotation and native = true flag. Is there any way I can write query in repository class and instead of the @Query annotation as the Query is very complex and dynamic. 回答1: You need to do a CustomRepository and add a method with native query. I do that this way: Create your custom repository: public interface

问题 I need to write a search query on multiple tables in database in spring boot web application. It uses spring data jpa. I know we can write native query in spring data jpa using @Query annotation and native = true flag. Is there any way I can write query in repository class and instead of the @Query annotation as the Query is very complex and dynamic. 回答1: You need to do a CustomRepository and add a method with native query. I do that this way: Create your custom repository: public interface

问题 I am working on an application using spring framework and I have run into a problem that I have been unable get past. I am trying to run my integration tests to ensure communication between my database and my application works quite well but I am running into a runtime exception. below is a list of my dependencies in my pom file, my property file and exception report <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springframework.version}

问题 I am working on an application using spring framework and I have run into a problem that I have been unable get past. I am trying to run my integration tests to ensure communication between my database and my application works quite well but I am running into a runtime exception. below is a list of my dependencies in my pom file, my property file and exception report <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springframework.version}

问题 I am working on an application using spring framework and I have run into a problem that I have been unable get past. I am trying to run my integration tests to ensure communication between my database and my application works quite well but I am running into a runtime exception. below is a list of my dependencies in my pom file, my property file and exception report <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springframework.version}

问题 Why does JPA OneToOne (or even OneToMany for that matter) have its orphanRemoval default to false . I mean, wouldn't it be better to force the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities by default & have the user make the choice to not do it explicitly? Would the current behavior of the default being false not result in orphan entries (that might potentially become zombie records) that might lead to bloat of

问题 Why does JPA OneToOne (or even OneToMany for that matter) have its orphanRemoval default to false . I mean, wouldn't it be better to force the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities by default & have the user make the choice to not do it explicitly? Would the current behavior of the default being false not result in orphan entries (that might potentially become zombie records) that might lead to bloat of

问题 I want to use projections in order to return less elements for the same queries. Page<Network> findByIdIn(List<Long> ids); Page<NetworkSimple> findByIdIn(List<Long> ids); Since the queries are created using the name of the method, what options do I have to do the same query but with different name ? 回答1: Spring Data query via method is constructed by convention and you can't change the name and yet expecting a same behavior. You can try to use @Query annotations which doesn't depend on the

问题 I want to use projections in order to return less elements for the same queries. Page<Network> findByIdIn(List<Long> ids); Page<NetworkSimple> findByIdIn(List<Long> ids); Since the queries are created using the name of the method, what options do I have to do the same query but with different name ? 回答1: Spring Data query via method is constructed by convention and you can't change the name and yet expecting a same behavior. You can try to use @Query annotations which doesn't depend on the

问题 I'm using Spring Data in my project. So, I need to intercept some methods (save and delete) only from some entities only. I tried to configure the pointcut for my own repositories interfaces, but without success. The methods wasn't intercepted. So, I found a solution that was to try to use the Spring CrudRepository interfaces into my pointcup. @Aspect @Component @Configurable public class AuditLogAspect { @Pointcut("execution(* org.springframework.data.repository.CrudRepository+.save(*)) || "