问题描述
我想使用 Spring Data Rest 的 RestResource 注解.如您所知，它默认公开所有 CRUD 方法.但我只需要 findAll 方法.一种方法是将所有其他方法的导出值设置为 false，如下所示:
I want to use RestResource annotation of spring data rest. As you know it exposes ALL CRUD methods by default. But I only need findAll method. One way is to set exported value of all other methods to false like this:
@RestResource(path="questions")
public interface QuestionRepository extends CRUDRepository<Question,Long> {
@RestResource(exported = false)
void delete(Long id);
@RestResource(exported = false)
void create(Question q);
....
}
但我不喜欢这样.还有其他更简单的方法可以避免这种冶金吗?
But I don't like this. Is there any other simpler way so I can avoid this metallurgy?
推荐答案
您可以通过定义一个实现 Repository 的中间通用接口来实现这一点，并公开例如所有带有注释的 PagingAndSortingRepository 方法
You can achieve this by defining an intermediate generic interface which implements Repository, and expose, for example, all PagingAndSortingRepository methods annotated with
@RestController(exported = false).
借助该来源:https://spring.io/blog/2011/07/27/fine-tuning-spring-data-repositories/，这是我的解决方案:
With the help of that source : https://spring.io/blog/2011/07/27/fine-tuning-spring-data-repositories/, here's my solution :
首先，将 RepositoryDetectionStrategy 设置为 ANNOTATED，以便公开的唯一存储库是那些带注释的 @RepositoryRestResource.这可以通过:
First of all, set the RepositoryDetectionStrategy to ANNOTATED so the only repositories exposed are those annotated @RepositoryRestResource. This can be done with :
@Component
public class SpringRestConfiguration extends
RepositoryRestConfigurerAdapter {
@Override
public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {
config.setRepositoryDetectionStrategy(RepositoryDetectionStrategy.RepositoryDetectionStrategies.ANNOTATED);
}
}
定义您的通用 Rest 存储库.它必须只实现 Repository 接口，它是空的，而不是 CrudRepository 或 PagingAndSortingRepository，因此您可以准确控制将公开哪些方法，并且公开的方法不取决于您正在使用或将使用的 Spring Data 版本.
Define your generic Rest repository. It has to implement only Repository interface, which is empty, and not CrudRepository or PagingAndSortingRepository, so you can control exactly which methods will be exposed, and the methods exposed doesn't depends on the Spring Data version you're using, or will use.
要保证非公开，您必须使用 @RestResource(exported=false) 注释每个方法.这有点烦人，但一劳永逸(你可以复制粘贴，我采用 CrudRepository 和 PagingAndSorting 中定义的所有 te 方法):
To garantee the non-exposition you have to annotate with @RestResource(exported=false) each method. It's a bit annoying but done once for all (you can just copy-paste, I take all te methods define in CrudRepository and PagingAndSorting) :
@RepositoryRestResource
@NoRepositoryBean
public interface RestRepositoryMethodExportedFalse<T, ID extends Serializable>
extends Repository<T, ID> {
/**
* Returns all entities sorted by the given options.
*
* @param sort
* @return all entities sorted by the given options
*/
@RestResource(exported = false)
Iterable<T> findAll(Sort sort);
/**
* Returns a {@link Page} of entities meeting the paging restriction
* provided in the {@code Pageable} object.
*
* @param pageable
* @return a page of entities
*/
@RestResource(exported = false)
Page<T> findAll(Pageable pageable);
/**
* Saves a given entity. Use the returned instance for further operations as
* the save operation might have changed the entity instance completely.
*
* @param entity
* @return the saved entity
*/
@RestResource(exported = false)
<S extends T> S save(S entity);
/**
* Saves all given entities.
*
* @param entities
* @return the saved entities
* @throws IllegalArgumentException
* in case the given entity is {@literal null}.
*/
@RestResource(exported = false)
<S extends T> Iterable<S> save(Iterable<S> entities);
/**
* Retrieves an entity by its id.
*
* @param id
* must not be {@literal null}.
* @return the entity with the given id or {@literal null} if none found
* @throws IllegalArgumentException
* if {@code id} is {@literal null}
*/
@RestResource(exported = false)
T findOne(ID id);
/**
* Returns whether an entity with the given id exists.
*
* @param id
* must not be {@literal null}.
* @return true if an entity with the given id exists, {@literal false}
* otherwise
* @throws IllegalArgumentException
* if {@code id} is {@literal null}
*/
@RestResource(exported = false)
boolean exists(ID id);
/**
* Returns all instances of the type.
*
* @return all entities
*/
@RestResource(exported = false)
Iterable<T> findAll();
/**
* Returns all instances of the type with the given IDs.
*
* @param ids
* @return
*/
@RestResource(exported = false)
Iterable<T> findAll(Iterable<ID> ids);
/**
* Returns the number of entities available.
*
* @return the number of entities
*/
@RestResource(exported = false)
long count();
/**
* Deletes the entity with the given id.
*
* @param id
* must not be {@literal null}.
* @throws IllegalArgumentException
* in case the given {@code id} is {@literal null}
*/
@RestResource(exported = false)
void delete(ID id);
/**
* Deletes a given entity.
*
* @param entity
* @throws IllegalArgumentException
* in case the given entity is {@literal null}.
*/
@RestResource(exported = false)
void delete(T entity);
/**
* Deletes the given entities.
*
* @param entities
* @throws IllegalArgumentException
* in case the given {@link Iterable} is {@literal null}.
*/
@RestResource(exported = false)
void delete(Iterable<? extends T> entities);
/**
* Deletes all entities managed by the repository.
*/
@RestResource(exported = false)
void deleteAll();
}
然后，只需在最终存储库中扩展您的自定义中间存储库，并使用您的示例唯一地覆盖您要公开的方法(您将获得自动完成，因此可以快速完成):
Then, just extends your custom intermediate repository in your final repositories, and override uniquely the method you want to expose, with your example (you get auto-completion so it's quickly done) :
@RestResource(path="questions")
public interface QuestionRepository extends RestRepositoryMethodExportedFalse<Question,Long>{
/**
* Here is the only method I expose
*/
@RestResource(exported = true)
@Override
Question findOne(Long id);
}
最好使用将默认值设置为 false 的参数，但在此之前，这是我找到的唯一安全的方法.
A parameter to set the default value of exported to false would be prefered, but until this is possible, here is the only safe way I find.
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