CODEWITHSUNDEEP
spring-data-rest
ivan
ivan

Reputation: 11

findBy URI not working in Spring Data Rest

By default, in Spring Data Rest the @Id of the entity is not exposed. In line with the REST rules, we're supposed to use the URI of the resource to refer to it. Given this assumption, the findBy queries should work if you pass a URI to them, but they don't.

For example, say I have a one-to-many relationship between Teacher and Student. I want to find students by teacher. 

List<Student> findByTeacher(Teacher teacher)

http://localhost:8080/repositories/students/search/findByTeacher?teacher=http://localhost:8080/repositories/teachers/1

This doesn't work because the framework is attempting to convert the teacher URI to a Long. I get this error that says "Failed to convert from type java.lang.String to type java.lang.Long".

Am I missing something?

Upvotes: 1

Views: 1463

Answers (2)

JR Utily
JR Utily

Reputation: 1842

See https://jira.spring.io/browse/DATAREST-502

Depending of your version of Spring Data, it would work as you want or not. If you are with Spring Data 2.4, you need to pass the URI. If you are with a previous version, you need to pass the id.

Upvotes: 1

Stackee007
Stackee007

Reputation: 3244

  1. You could expose @Id s by configuring web intializer

    //Web intializer @Configuration public static class RespositoryConfig extends RepositoryRestMvcConfiguration { @Override protected void configureRepositoryRestConfiguration( RepositoryRestConfiguration config) { config.exposeIdsFor(Teacher.class); } }

  2. Its good to change List to Page

    List findByTeacher(Teacher teacher)

to

Page<Student> findByTeacher(@Param("teacher) Teacher teacher, Pageable pageable);

Also note @Param annotation is required along with Pageable. The latter is required because return type "Page"

3.Latest snapshots, not milestones work fine

Upvotes: 2

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