我遇到的问题类似于this question中提出的问题,但是采用了建议的解决方案
spring.jackson.default-property-inclusion=NON_NULL
不会阻止HATEOAS渲染具有空属性的链接。这是我的控制器声明
@RestController
@ExposesResourceFor(Customer.class)
public class CustomerController {
// controller methods here
}
和网络配置类
@Configuration
@EnableSpringDataWebSupport
@EnableHypermediaSupport(type = EnableHypermediaSupport.HypermediaType.HAL)
public class DataApiWebConfiguration extends WebMvcConfigurationSupport {
// config here
}
在返回资源的Controller get方法中,我声明了映射,如下所示
@GetMapping(value = "/customers/{id}", produces = MediaTypes.HAL_JSON_VALUE)
然后返回Resource
Optinal<Customer> customer = customerRepository.findById(id);
return customer.map(customerResourceAssembler::toResource).map(ResponseEntity::ok)
.orElse(ResponseEntity.notFound().build());
CustomerResourceAssembler
扩展了SimpleIdentifiableResourceAssembler
,如this spring-hateaos example所示。
但是在响应正文中,我仍然看到使用null属性呈现的链接
"links": [
{
"rel": "self",
"href": "http://localhost:8080/customers/11",
"hreflang": null,
"media": null,
"title": null,
"type": null,
"deprecation": null
}
]
这看起来不像HATEOAS响应,就像在示例中,我在JSON中看到_links
而不是links
答案 0 :(得分:0)
问题出在我的配置类中,我以错误的方式注册了Hibernate5Module,删除了这些行
quill.root.innerHTML = postContent;
并简单地添加了一个豆
@Bean
public MappingJackson2HttpMessageConverter customJackson2HttpMessageConverter() {
MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
ObjectMapper objectMapper = new HibernateAwareObjectMapper();
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
jsonConverter.setObjectMapper(objectMapper);
return jsonConverter;
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(customJackson2HttpMessageConverter());
super.addDefaultHttpMessageConverters(converters);
}
固定输出的
@Bean
public Module hibernate5Module() {
return new Hibernate5Module();
}