我正在使用带有Solr 4.4.0和Spring 3.2.4.RELEASE的spring-data-solr 1.0.0.RELEASE编写基于Spring MVC的Search API.
我能够运行基本查询但无法找到任何好的示例如何返回得分和距离:结果中的geodist().
我知道我可以使用查询来获取Solr的结果
http://localhost:8983/solr/events/select?q=*:*&spatial=true&pt=51.435872%2C-0.427529&sfield=position&d=20&facet=true&facet.mincount=1&facet.limit=-1&facet.field=categoryIds&fl=score,*,distance:geodist()&sort=geodist()+asc
但我不知道如何使用spring-data-solr从Solr返回得分和距离属性.我试过以下代码
FacetQuery search = new SimpleFacetQuery(); Criteria conditions;// = new Criteria(); if(StringUtils.isNotBlank(searchCriteria.getSearchString())) conditions = new Criteria(EventDocument.FIELD_EVENT).contains(searchCriteria.getSearchString()); if(searchCriteria.isLocationKnown()){ conditions.and(new Criteria(EventDocument.FIELD_POSITION).within(new GeoLocation(searchCriteria.getLatitude(), searchCriteria.getLongitude()), new Distance(searchCriteria.getDistance(), Distance.Unit.MILES))); conditions.and(new Criteria(CommonParams.FL).is("score,distance:geodist(),*")); } else{ conditions.and(new Criteria(CommonParams.FL).is("score,*")); } search.addCriteria(conditions); FacetPage page = solrTemplate.queryForFacetPage(search, EventDocument.class);
但得到以下例外:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.data.solr.UncategorizedSolrException: undefined field fl; nested exception is org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException: undefined field fl org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:948) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) javax.servlet.http.HttpServlet.service(HttpServlet.java:728) root cause org.springframework.data.solr.UncategorizedSolrException: undefined field fl; nested exception is org.apache.solr.client.solrj.impl.HttpSolrServer$RemoteSolrException: undefined field fl org.springframework.data.solr.core.SolrTemplate.execute(SolrTemplate.java:122) org.springframework.data.solr.core.SolrTemplate.executeSolrQuery(SolrTemplate.java:330) org.springframework.data.solr.core.SolrTemplate.query(SolrTemplate.java:326) org.springframework.data.solr.core.SolrTemplate.queryForFacetPage(SolrTemplate.java:285) com.johnstonpress.api.repository.EventDocumentRepositoryImpl.search(EventDocumentRepositoryImpl.java:72) com.johnstonpress.api.service.SearchEventServiceImpl.search(SearchEventServiceImpl.java:106) com.johnstonpress.api.controller.EventsSearchController.searchEvents(EventsSearchController.java:124) com.johnstonpress.api.controller.EventsSearchController.search(EventsSearchController.java:68) sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:601) org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) javax.servlet.http.HttpServlet.service(HttpServlet.java:621) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
感谢您的关注和帮助!
要设置fl
你必须使用query.addProjectionOnField(String fieldname)
.
SimpleQuery query = new SimpleQuery(conditions); query.addProjectionOnField("*"); query.addProjectionOnField("score");
要映射score
到EventDocument
您必须添加属性如下.
@Indexed(value = "score", readonly = true) private Float score;
不幸的是,似乎存在一个问题,geodist()
这可能是由spring数据solr创建空间查询的方式引起的.为此打开DATASOLR-130.
距离可以使用要求SolrCallback
以及SolrTemplate
自己设定的空间paramters.
SimpleQuery query = new SimpleQuery(conditions); query.addProjectionOnField("*"); query.addProjectionOnField("distance:geodist()"); DefaultQueryParser qp = new DefaultQueryParser(); final SolrQuery solrQuery = qp.constructSolrQuery(query); solrQuery.add("sfield", "store"); solrQuery.add("pt", GeoConverters.GeoLocationToStringConverter.INSTANCE.convert(new GeoLocation(45.15, -93.85))); solrQuery.add("d", GeoConverters.DistanceToStringConverter.INSTANCE.convert(new Distance(5))); List<EventDocument> result = template.execute(new SolrCallback<List<EventDocument>>() { @Override public List<EventDocument> doInSolr(SolrServer solrServer) throws SolrServerException, IOException { return template.getConverter().read(solrServer.query(solrQuery).getResults(), EventDocument.class); } });
更轻松的是提供所需的参数geodist()
.
SimpleQuery query = new SimpleQuery(conditions); query.addProjectionOnField("*"); query.addProjectionOnField("distance:geodist(store," + GeoConverters.GeoLocationToStringConverter.INSTANCE.convert(new GeoLocation(45.15, -93.85)) + ")"); Page<EventDocument> result = template.queryForPage(query, EventDocument.class);
希望有所帮助!