使用Cloudant客户端搜索API不会返回所有预期结果

时间:2017-10-03 20:11:51

标签: java lucene cloudant

我是Cloudant的新手,但已经在DB2上用SQL开发了一段时间。我遇到了一个问题,我认为我正在使用Lucene查询引擎和Cloudant索引从我的查询中返回结果,但只有三分之二的预期字段返回数据。不返回数据的字段是数组。我们的应用程序运行Java并使用IBM的Bluemix和WebSphere Liberty Profile执行。我打包了cloudant-client-2.8.0.jar和cloudant-HTTP-2.8.0.jar文件来访问cloudant数据库。我们有许多查询正在运行,因此连接本身很好。

以下是我访问Cloudant API的代码:

....
Search searchSaaSData = ServiceManagerSingleton.getInstance().getSaaSCapabilitiesDatabase().search("versioning-ddoc/versioning-indx").includeDocs(true);

SearchResult<DocTypeInfo> result = searchSaaSData.querySearchResult(this.getJsonSelector(deliverableId), DocTypeInfo.class);
....

这是this.getJsonSelector代码:

private String getVersioningSearch(String deliverableId) {
    String query = "";
    if (deliverableId != null && !deliverableId.isEmpty()) {
        // Search based on deliverableId
        query += "(";
        query += "deliverableId:\"" + deliverableId + "\"" + ")";
    }

    logger.log(Level.INFO, "Search query is: " + query);
    // The query is simple, will look like this: 
    // deliverableId:"0B439290AB5011E6BE74C84817AAB206")

    return query;
}

从上面的java代码中我可以看到,我使用java对象DocTypeInfo.class来保存从搜索返回的数据。这是班级:

public class DocTypeInfo {
    private final String docType;
    private final String version;
    private String isPublishedForReports;

    public DocTypeInfo(String docType, String version) {
        this.docType = docType;
        this.version = version;
    }

    /**
     * @return the docType
     */
    private String getDocType() {
        return docType;
    }

    /**
     * @return the version
     */
    private String getVersion() {
        return version;
    }

    /**
     * @return the isPublishedForReports
     */
    public String getIsPublishedForReports() {
        return isPublishedForReports;
    }

    /**
     * @param isPublishedForReports the isPublishedForReports to set
     */
    public void setIsPublishedForReports(String isPublishedForReports) {
        this.isPublishedForReports = isPublishedForReports;
    }       

}

我使用Cloudant仪表板设置了设计文档和索引,如下所示:

{
"_id": "_design/versioning-ddoc",
"_rev": "22-0e0c0ccfc2b5fe7245352da7e5b1ebd3",
"views": {},
"language": "javascript",
"indexes": {
  "versioning-indx": {
  "analyzer": {
    "name": "perfield",
    "default": "standard",
    "fields": {
      "deliverableId": "whitespace",
      "docType": "standard",
      "version": "standard",
      "isPublishedForReports": "keyword"
    }
  },
  "index": "function (doc) {
               index(\"deliverableId\", doc.deliverableId, {\"store\":true, \"boost\":1.0});
   index(\"docType\", doc.docType, {\"store\":true, \"boost\":1.0});
   index(\"version\", doc.version, {\"store\":true, \"boost\":1.0});
   if (Array.isArray(doc.publishSettings)) {
     for (var i in doc.publishSettings) {
       if (doc.publishSettings[i].options) {
         for (var j in doc.publishSettings[i].options) {
           index(\"isPublishedForReports\", doc.publishSettings[i].options[j].optionId, {\"store\":true, \"boost\":1.0});
           }
         }
       }
     }
   }"
  }
  }
 }

当我执行搜索时,会填充docType和version字段,但isPublishedForReports字段始终为null或不返回。当我在Cloudant仪表板中针对索引运行查询时,我可以看到返回了isPublishedForReports值,我不知道它为什么没有填充在对象中?也许我误解了这些是如何构建的?

这是我查询数据库的屏幕截图,我可以看到我想要的结果: enter image description here

请帮忙! -Doug

1 个答案:

答案 0 :(得分:1)

我认为您正在访问docs中每行的result.rows属性,而不是fields属性。当您使用.includeDocs(true)运行搜索时,您会看到类似于以下内容的结果:

{
  "total_rows":3,
  "bookmark":"g1AAA",
  "rows":[
    {
      "id":"263a81ea76528dead3a4185df3676f62",
      "order":[
        1.0,
        0
      ],
      "fields":{
        "docType":"xxx",
        "deliverableId":"yyy",
        "isPublishedForReports":"pu_1_2"
      },
      "doc":{
        "_id":"263a81ea76528dead3a4185df3676f62",
        "_rev":"3-116dd3831c182fb13c12b05a8b0996e4",
        "docType":"xxx",
        "deliverableId":"yyy",
        "publishSettings":[...]
      }
    }
    ...
  ]
} 

注意如何在fields属性中查看您在搜索索引中定义的字段以及doc属性中的完整文档。完整文档不包含isPublishedForReports

要获取isPublishedForReports属性,您需要访问fields属性:

for (SearchResult<DocTypeInfo>.SearchResultRow row : result.getRows()) {
   ...
   row.getFields().getIsPublishedForReports()
   ...
}

此外,如果您不需要整个文档,则可以设置.includeDocs(false)并仅访问fields属性。