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/