问题
I've got a Module A that provides authentication through users, groups and related classes. This module uses org.springframework.data:spring-data-jpa:1.6.0.RELEASE to access this data from a database. Of note might be that Module A uses a custom BaseRepository configured by extending JpaRepositoryFactoryBean, but removing this does not resolve the issue below.
A second Module B also has some classes and repositories to manage, unrelated to the Module A classes, again using spring-data-jpa for storage, but connected to a different database. This project exposes it's repositories via REST using org.springframework.data:spring-data-rest-webmvc:2.1.0.RELEASE. Module B uses the classes in module A for authenticating users, but does not manipulate those class instances nor does it store any references.
The issue I'm having now is that my module B REST APIs work flawlessly when Module A is not present (or with an older version not yet using spring-data-jpa), but when it is I present it breaks on creating self referential links with the below stacktrace:
java.lang.IllegalArgumentException: Cannot create self link for class Document! No persistent entity found!
at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.getSelfLinkFor(PersistentEntityResourceAssembler.java:81) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:64) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:32) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
at org.springframework.data.web.PagedResourcesAssembler.createResource(PagedResourcesAssembler.java:144) ~[spring-data-commons-1.8.0.M1.jar:na]
at org.springframework.data.web.PagedResourcesAssembler.toResource(PagedResourcesAssembler.java:96) ~[spring-data-commons-1.8.0.M1.jar:na]
at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.entitiesToResources(AbstractRepositoryRestController.java:220) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.resultToResources(AbstractRepositoryRestController.java:207) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
at org.springframework.data.rest.webmvc.RepositoryEntityController.getCollectionResource(RepositoryEntityController.java:135) ~[spring-data-rest-webmvc-2.1.0.M1.jar:na]
See also: https://github.com/spring-projects/spring-data-rest/blob/master/spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/PersistentEntityResourceAssembler.java#L80
It looks to be talking to the wrong MappingContext in the RepositoryFactoryBeanSupport, even if my org.springframework.data.repository.support.Repositories contains all the repositoryBeanNames from both Module A and Module B.
Does anyone know how I can enforce the use of a particular MappingContext, perhaps through my extension of RepositoryRestMvcConfiguration?
** Edit **
Here's an GitHub repository illustrating the problem:
https://github.com/timtebeek/dual-data-jpa-rest-webmvc
It's since been reported as a bug on the data-rest project:
https://jira.spring.io/browse/DATAREST-312
回答1:
This happens to me today
I was trying to query a specific Entity
I fix it creating the repository of that class
In your case it'll be
@Repository
public interface DocumentRepository extends JpaRepository<Document, Long> {
}
also doing all the needed configuration to use jpa repositories. Look here
I hope that hepls.
来源：https://stackoverflow.com/questions/23763585/how-to-choose-mappingcontext-in-spring-data-jpa-2x-spring-rest-webmvc