Spring 当跟随rel链接时,HAL使用单数名词而不是复数名词链接
我正在使用Spring Boot(2.1.1)自动创建我的Spring 当跟随rel链接时,HAL使用单数名词而不是复数名词链接,spring,spring-data-rest,spring-hateoas,hal-json,Spring,Spring Data Rest,Spring Hateoas,Hal Json,我正在使用Spring Boot(2.1.1)自动创建我的JpaRepository接口的HAL REST API 在大多数情况下,这些接口是空的,例如: public interface ProjectRepository extends JpaRepository<Project, Long> {} public interface ProtocolRepository extends JpaRepository<Protocol, Long> {} 但当我遵循该
JpaRepository
接口的HAL REST API
在大多数情况下,这些接口是空的,例如:
public interface ProjectRepository extends JpaRepository<Project, Long> {}
public interface ProtocolRepository extends JpaRepository<Protocol, Long> {}
但当我遵循该链接时,会生成所有其他链接:
...
"_links": {
"self": {
"href": "http://localhost:8080/admin/project/1"
},
"project": {
"href": "http://localhost:8080/admin/project/1"
}
...
}
...
链接中的错误是使用了单数名词project
,而不是复数形式projects
由于这些链接是自动生成的,因此不清楚如何更改此行为。在调试Spring内部构件时,我发现
PersistentEntityResourcesAssembler
使用DefaultSelfLinkProvider
的实例来创建自链接。
当我调试该类时,我意识到当为Hibernate代理的对象生成自链接时,该类无法正常工作
因此,我尝试用自己的SelfLinkProvider
-接口实现来替换DefaultSelfLinkProvider
这可以通过BeanPostProcessor
完成:
@Bean
public BeanPostProcessor entityManagerBeanPostProcessor()
{
return new BeanPostProcessor()
{
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException
{
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException
{
if (bean instanceof SelfLinkProvider)
{ return new HibernateSelfLinkProvider((SelfLinkProvider) bean); }
return bean;
}
};
}
而HibernateSelfLinkProvider
是一个围绕SelfLinkProvider
的简单包装器:
public class HibernateSelfLinkProvider implements SelfLinkProvider
{
private final SelfLinkProvider selfLinkProvider;
public HibernateSelfLinkProvider(SelfLinkProvider selfLinkProvider)
{
this.selfLinkProvider = selfLinkProvider;
}
@Override
public Link createSelfLinkFor(Object instance)
{
instance = Hibernate.unproxy(instance);
return selfLinkProvider.createSelfLinkFor(instance);
}
}
Hibernate.unproxy()
的好处在于,如果给定对象不是代理对象,它将保持不变
通过此添加,我获得了正确的链接:“http://localhost:8080/admin/projects/1“
。
但我不确定这是否是修改行为的最佳场所
public class HibernateSelfLinkProvider implements SelfLinkProvider
{
private final SelfLinkProvider selfLinkProvider;
public HibernateSelfLinkProvider(SelfLinkProvider selfLinkProvider)
{
this.selfLinkProvider = selfLinkProvider;
}
@Override
public Link createSelfLinkFor(Object instance)
{
instance = Hibernate.unproxy(instance);
return selfLinkProvider.createSelfLinkFor(instance);
}
}