Aem 无法将模型类改编为SlingHttpServletRequest

我试图在我的模型类中注入资源。当我使用注解

@Model（adapteables={SlingHttpServletRequest.class，Resource.class}）时遇到的问题

我将对象获取为null，而仅使用Resource.Class我将获取对象（navigationItems）。下面是我的课程片段。你能告诉我修理它的步骤吗

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.resource.Resource;
import org.apache.sling.models.annotations.Model;
import org.apache.sling.models.annotations.Optional;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.inject.Named;
import java.util.List;

@Model(adaptables =  { SlingHttpServletRequest.class, Resource.class })
public class Header {
    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Inject
    @Optional
    @Named("navitems")
    private Resource navigationItems;

    List<SiteNavigation> siteNavigationList;

    @PostConstruct
    protected void init() {
        logger.info("In init method of header model.");
        siteNavigationList = getSiteNavigationListItems(getNavigationItems());
    }

    private List<SiteNavigation> getSiteNavigationListItems(final Resource navigationItems, final Resource columnFourItems) {
        return null;
    }

    public Resource getNavigationItems() {
        return navigationItems;
    }
}

---

此问题通过@Via注释解决。下面是我使用的代码片段

@Inject
    @Via("resource")
    @Named("navitems")
    private Resource navigationItems;

---

代码中有3个指针：

虽然sling9支持多个适配器，但最好是SlingHttpServetRequest对象。它位于更高的层，并包裹大多数其他对象

建议将您的注入器设置为比通用@Inject更多的注入器

始终指定将模型与特定资源类型关联。有利于碎片的导出，sling关联更紧密，可读性更好 这将是我对您的吊索型号的代码：

@Model(adaptables = SlingHttpServletRequest.class, resourceType = "myprj/components/content/header",
  defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class Header {

  @ChildResource
  private Resource navitems; // Keeping resource name and attribute name identical reduces @Named annotation

---

request.getResource（）

是否提供了错误的资源？添加了

@Inject-SlingHttpServletRequest请求request.getResource（）

中的code>为我提供了正确的节点路径，该节点是头节点<代码>/conf/myprj/settings/wcm/templates/homepage/structure/jcr:content/root/header

@Model(adaptables = SlingHttpServletRequest.class, resourceType = "myprj/components/content/header",
  defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
public class Header {

  @ChildResource
  private Resource navitems; // Keeping resource name and attribute name identical reduces @Named annotation