spring data rest mongodb java.lang.IllegalArgumentException: PersistentEntity 不能为空

Question

我正在尝试通过 SDR 访问 mongodb 集合。目前使用以下版本

    <spring.version>4.1.9.RELEASE</spring.version>
    <spring-data-rest>2.4.4.RELEASE</spring-data-rest>
    <spring-data-mongodb>1.8.4.RELEASE</spring-data-mongodb>

我的仓库看起来像

@RepositoryRestResource
@PreAuthorize("hasAuthority('ROLE_USER')")
public interface LinksRepository extends MongoRepository<Link, String> {
Page<Link> findAllByUsefulURLRegex(@Param("regex") String regex, Pageable p);

我的模型定义如下

@Document(collection = "links")
public class Link {
    public Link() {}
    @Id
    private String id;

当我点击http://localhost:9090/api/links 时，我得到以下异常

java.lang.IllegalArgumentException: PersistentEntity must not be null!
    at org.springframework.util.Assert.notNull(Assert.java:112)
    at org.springframework.data.rest.webmvc.PersistentEntityResource$Builder.<init>(PersistentEntityResource.java:139)
    at org.springframework.data.rest.webmvc.PersistentEntityResource$Builder.<init>(PersistentEntityResource.java:122)
    at org.springframework.data.rest.webmvc.PersistentEntityResource.build(PersistentEntityResource.java:114)
    at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.wrap(PersistentEntityResourceAssembler.java:102)
    at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:83)
    at org.springframework.data.rest.webmvc.PersistentEntityResourceAssembler.toResource(PersistentEntityResourceAssembler.java:45)
    at org.springframework.data.web.PagedResourcesAssembler.createResource(PagedResourcesAssembler.java:182)
    at org.springframework.data.web.PagedResourcesAssembler.toResource(PagedResourcesAssembler.java:115)
    at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.entitiesToResources(AbstractRepositoryRestController.java:127)
    at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.toResources(AbstractRepositoryRestController.java:88)
    at org.springframework.data.rest.webmvc.AbstractRepositoryRestController.toResource(AbstractRepositoryRestController.java:110)
    at org.springframework.data.rest.webmvc.RepositorySearchController.executeSearch(RepositorySearchController.java:185)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:775)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:705)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:965)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:856)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)

稍微挖掘一下，我发现 MongoMappingContext 没有应有的 Link 类（我猜）

我花了几个小时试图弄清楚但没有运气。我没有使用 spring boot，感觉可能是 ObjectMapper 的问题，但我不知道，我的域和设置很简单......非常感谢任何帮助。

提前致谢。

Answer 1

在花费了 不公平 大量的时间来调试它之后，我设法通过以下配置使其工作，而我这边没有任何代码更改：

    <spring.version>4.1.8.RELEASE</spring.version>
    <spring-data-rest>2.3.2.RELEASE</spring-data-rest>
    <spring-data-mongodb>1.8.0.RELEASE</spring-data-mongodb>
    <spring-data-jpa>1.9.0.RELEASE</spring-data-jpa>

它可能与其他组合一起使用。请注意。