AEM页面导出器未包含多字段组件问题求助

问题场景 #

使用AEM默认模型导出器导出包含多字段组件的页面时，访问homepage.model.json返回的JSON中缺少多字段数据：

carousel: {
    :type: "mysite/components/public/carousel",
    title: "Test title"
}

已尝试操作及局部结果 #

为带多字段的carousel组件创建了自定义模型导出器：

@Model(adaptables = Resource.class,
        defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL,
        resourceType = {"mysite/components/public/carousel"})
@Exporter(name = "jackson", extensions = "json")

public class CarouselModelImpl implements CarouselModel, ComponentModel {

...
@Getter
    private List<CarouselBean> slides;
...
}

此时单独访问组件导出地址homepage/jcr:content/carousel.model.json，能得到包含多字段的正确JSON：

{
    title: "Test title",
    slides: [
    {
        title: "slide title 1",
        description: null,
        ctaLabel: "cta label",
        ctaLink: "#",
        image: "/content/dam/mysite/Rectangle 2.png"
    },
    {
        title: "slide title 2",
        description: null,
        ctaLabel: "cta label",
        ctaLink: "#",
        image: "/content/dam/mysite/image.png"
    }
    ]
}

但访问页面级导出地址homepage.model.json时，多字段内容依然缺失，返回内容和最初一致。

自定义页面导出器遇到的问题 #

尝试创建自定义Page Exporter遍历子资源获取完整JSON，但调用modelFactory.getModelFromResource时modelFactory为null，代码如下：

@Model(adaptables = Resource.class,
        defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL,
        resourceType = {"mysite/components/public/structure/public-page"})
@Exporter(name = "jackson", extensions = "json")
public class PageExporterServlet {

    private static final Logger log = LoggerFactory.getLogger(PageUtils.class);

    @Reference
    private ModelFactory modelFactory;

    @Reference
    private SlingScriptHelper slingScriptHelper;

    @Self
    private Resource resource;

    @Getter
    private String myTitle = "Test";

    @Getter
    Map<String, Object> pageData = new HashMap<>();

    @PostConstruct
    protected void init() {
        try {
            processResource(resource, pageData);
        } catch (Exception e) {
            log.debug(e.getMessage());
        }
    }

    private void processResource(Resource resource, Map<String, Object> pageData) {
        if (resource != null) {
            Iterable<Resource> childResources = resource.getChildren();
            for (Resource childResource : childResources) {
                ComponentModel componentModel = (ComponentModel) modelFactory.getModelFromResource(childResource);
                if (componentModel != null) {
                    pageData.put(childResource.getPath(), componentModel.getData());
                } else {
                    processResource(childResource, pageData);
                }
            }
        }
    }
}

可行解决方案 #

1. 修复ModelFactory空指针问题 #

@Model注解类中，@Reference无法直接完成OSGi服务注入，需改用@Inject配合@OSGiService注解获取ModelFactory：

@Inject
@OSGiService
private ModelFactory modelFactory;

替换原代码中的@Reference private ModelFactory modelFactory;，即可正确注入服务实例。

2. 优化页面资源遍历逻辑 #

调整遍历逻辑，只处理业务组件资源，避免无效递归：

private void processResource(Resource resource, Map<String, Object> pageData) {
    if (resource == null) return;

    // 仅处理业务组件（排除CQ系统组件）
    String resourceType = resource.getValueMap().get("sling:resourceType", String.class);
    if (resourceType != null && !resourceType.startsWith("cq:")) {
        try {
            ComponentModel componentModel = modelFactory.getModelFromResource(resource, ComponentModel.class);
            if (componentModel != null) {
                pageData.put(resource.getName(), componentModel.getData());
            }
        } catch (Exception e) {
            log.error("Failed to load model for resource: {}", resource.getPath(), e);
        }
    }

    // 递归处理子资源
    for (Resource child : resource.getChildren()) {
        processResource(child, pageData);
    }
}

3. 替代方案：使用Core Components页面模型导出器 #

无需自定义代码，直接使用AEM Core Components提供的Page Model Exporter。只需确保页面资源类型继承自Core Components的Page组件，且自定义组件模型实现ComponentExporter接口，即可自动导出所有组件的完整数据（包括多字段）。

内容的提问来源于stack exchange，提问作者Stefanos Karakasis