我为 PDF 文档实现了一个简单的添加工具。我首先创建一个包含所有文档的主文档 (SolrInputDocument)。它获取作者、文件哈希、关键字、'content_type=document' 等字段。

之后我为每个页面生成一个 SolrInputDocument，这个对象得到一个像 'parentID_p01' 这样的 id，页面作为一个字段值，'content_type=page' usw。

最后，我使用 addChildDocument() 将所有页面文档添加到我的主文档中。

现在我的问题是，如何在所有文档的所有页面中执行给定单词的搜索，例如:

Document1.pdf 'this is my doc1 title' [2 matches]
    [Page 14] 'Example phrase for special a <em>word</em> given by.... 
    [Page 55] 'another <em>word</em> for this test

Document2.pdf 'doc2 title' [X matches]
    [Page 1] 'given <em>word</em> in this text 
    [Page 2] '<em>words</em> hit more than fists
    [Page 99] 'some <em>words</em> of wisdom

我的第一个想法是使用“text:word~”进行简单搜索，然后按父文档分组，但我没有找到好的方法:-(

似乎嵌套文档对 solr 来说有点新，我没有找到 SolrJ 的简单解决方案。

提前致谢

最佳答案

我在 solr 上创建了以下格式的父子关系数据。其中一个 insurance_accounts 有多人的车辆保险。一个人可以拥有多辆车，如汽车、自行车等。我将人作为父文件，将车辆作为子文件。

<insurance_accounts>
            <person>
                <firstname>John</firstname>
                <lastname>Jones</lastname>
                ...other details...
                <cars>
                    <car>
                        <make>honda</make>
                        <model>accord</model>
                    </car>
                    <car>
                        <make>Nissan</make>
                        <model>Maxima</model>
                    </car>
                </cars>
                <bikes>
                    <bike>
                        <make>yamaha</make>
                        <model>passion</model>
                    </bike>
                    <bike>
                        <make>Peugeot</make>
                        <model>Vivacity</model>
                    </bike>
                </bikes>
            </person>
            <person>
                ...
            </person>
          </insurance_accounts>

在下面的 java 代码中，我使用 solrj 4.9 创建文档并在 SOLR 上运行搜索查询。我已经处理了 QueryResponse 以显示所需的结果并给出了 solr 查询 URL。

您可以从给定的代码片段中获取帮助，让我知道它是否有效。

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.LinkedHashMap;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.impl.HttpSolrServer;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;

public class SolrNestedSearch {

    static final String SOLR_URL = "http://localhost:8983/solr/collection1";

    public static void main ( String[] args ) throws Exception {

        HttpSolrServer solr = new HttpSolrServer( SOLR_URL );

        // Docs to submit
        Collection<SolrInputDocument> batch = new ArrayList<SolrInputDocument>();

        // Parent Doc 1, a person mamed John Jones
        SolrInputDocument person1 = new SolrInputDocument();
        person1.addField( "id",            "john_jones" );
        person1.addField( "content_type",  "person"     );
        // "_t" suffix tells Solr that it's text
        person1.addField( "first_name_t",  "John"       );
        person1.addField( "last_name_t",   "Jones"      );
        // states and history used in edismax examples
        person1.addField( "states_t",      "California Nevada Idaho Maine" );
        person1.addField( "history_t",     "safe accident accident accident accident accident" );

        // child docs, the vehicles he owns
        SolrInputDocument p1_car1 = new SolrInputDocument();
        p1_car1.addField( "id",            "jj_car1"    );
        p1_car1.addField( "content_type",  "car"        );
        // For cars "make" is an alias for "manufacturer"
        p1_car1.addField( "make_t",        "Honda"      );
        p1_car1.addField( "model_t",       "Accord"     );

        SolrInputDocument p1_car2 = new SolrInputDocument();
        p1_car2.addField( "id",            "jj_car2"    );
        p1_car2.addField( "content_type",  "car"        );
        p1_car2.addField( "make_t",        "Nissan"     );
        p1_car2.addField( "model_t",       "Maxima"     );

        SolrInputDocument p1_bike1 = new SolrInputDocument();
        p1_bike1.addField( "id",           "jj_bike1"   );
        p1_bike1.addField( "content_type", "bike"       );
        p1_bike1.addField( "make_t",       "Yamaha"     );
        p1_bike1.addField( "model_t",      "Passion"    );

        SolrInputDocument p1_bike2 = new SolrInputDocument();
        p1_bike2.addField( "id",           "jj_bike2"   );
        p1_bike2.addField( "content_type", "bike"       );
        p1_bike2.addField( "make_t",       "Peugeot"    );
        p1_bike2.addField( "model_t",      "Vivacity"   );

        // Add children to parent
        person1.addChildDocument( p1_car1  );
        person1.addChildDocument( p1_car2  );
        person1.addChildDocument( p1_bike1 );
        person1.addChildDocument( p1_bike2 );

        // Add parent to batch
        batch.add( person1 );


        // Parent Doc 2, person mamed Satish Smith
        SolrInputDocument person2 = new SolrInputDocument();
        person2.addField( "id",           "satish_smith" );
        person2.addField( "content_type", "person"       );
        person2.addField( "first_name_t", "Satish"       );
        person2.addField( "last_name_t",  "Smith"        );
        person2.addField( "states_t",     "California Texas California Maine Vermont Connecticut" );
        person2.addField( "history_t",    "safe safe safe safe safe safe safe safe accident" );

        // Vehicles (child docs)
        SolrInputDocument p2_car1 = new SolrInputDocument();
        p2_car1.addField( "id",            "ss_car1"     );
        p2_car1.addField( "content_type",  "car"         );
        p2_car1.addField( "make_t",        "Peugeot"     );
        p2_car1.addField( "model_t",       "iOn"         );
        SolrInputDocument p2_bike1 = new SolrInputDocument();
        p2_bike1.addField( "id",           "ss_bike1"    );
        p2_bike1.addField( "content_type", "bike"        );
        p2_bike1.addField( "make_t",       "Honda"       );
        p2_bike1.addField( "model_t",      "Spree"       );
        // link objects and add to batch
        person2.addChildDocument( p2_car1  );
        person2.addChildDocument( p2_bike1 );
        batch.add( person2 );

        System.out.println( "Adding batch of " + batch.size() + " parent docs" );

        // Submit as a group
        solr.add( batch );
        solr.commit();



        Map<String,String> params = new LinkedHashMap<>();
        params.put( "parent_filter", "content_type:person" );
        params.put( "defType", "edismax" );
        params.put( "qf", "history_t states_t^100" );
        doQuery(solr,
                "eDismax3: Drivers matching accidents and/or California, and all of their vehicles, boost on State",
                "California accident report",
                "{!parent which=$parent_filter}",
                "*,[child parentFilter=$parent_filter]",
                params );

    }


    static void doQuery( HttpSolrServer solr, String description, String queryStr, String optFilter,
            String optFields, Map<String,String>extraParams ) throws Exception
    {
        SolrQuery q = new SolrQuery( queryStr );
        if ( null!=optFilter ) {
            q.addFilterQuery( optFilter );
        }
        if ( null!=optFields ) { 
            q.setParam( "fl", optFields );   
        }
        else {
            q.addField( "*" );  
        }
        if ( null!=extraParams ) {
            for ( Entry<String,String> param : extraParams.entrySet() ) {
                q.set( param.getKey(), param.getValue() );
            }
        }

        // Run and show results
        QueryResponse rsp = solr.query( q );
        SolrDocumentList docs = rsp.getResults();
        long numFound = docs.getNumFound();
        System.out.println( "Matched: " + numFound );
        int docCounter = 0;
        for (SolrDocument doc : docs) {
            docCounter++;
            System.out.println( "Doc # " + docCounter );
            for ( Entry<String, Object> field : doc.entrySet() ) {
                String name = field.getKey();
                Object value = field.getValue();
                System.out.println( "\t" + name + "=" + value );
            }
            List<SolrDocument> childDocs = doc.getChildDocuments();
            if ( null!=childDocs ) {
                for ( SolrDocument child : childDocs ) {
                    System.out.println( "\tChild doc:" );
                    for ( Entry<String, Object> field : child.entrySet() ) {
                        String name = field.getKey();
                        Object value = field.getValue();
                        System.out.println( "\t\t" + name + "=" + value );
                    }
                }
            }
        }

        System.out.println( "Query URL:" );
        System.out.println( SOLR_URL + "/select?" + q );
    }
}

关于java - 在 Solr(J) 中搜索嵌套文档，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27983644/