我正在为我的一个搜索应用程序将 solr 从 5.4.3 迁移到 8.11，并成功升级到 7.7.3。但是对于进一步的升级，响应数据的顺序比以前发生了变化。在这里，我尝试将 FunctionScoreQuery 与 DoubleValuesSource 一起使用，因为 CustomScoreQuery 在 7.7.3 中已弃用并在 8 中删除。
下面是我的代码片段（现在我使用的是 solr 8.5.2 和 Lucene 8.5.2）
public class CustomQueryParser extends QParserPlugin {
@Override
public QParser createParser(final String qstr, final SolrParams localParams, final SolrParams params,
final SolrQueryRequest req) {
return new MyParser(qstr, localParams, params, req);
}
private static class MyParser extends QParser {
private Query innerQuery;
private String queryString;
public MyParser(final String qstr, final SolrParams localParams, final SolrParams params,
final SolrQueryRequest req) {
super(qstr, localParams, params, req);
if (qstr == null || qstr.trim().length() == 0) {
this.queryString = DEFAULT_SEARCH_QUERY;
setString(this.queryString);
} else {
this.queryString = qstr;
}
try {
if (queryString.contains(":")) {
final QParser parser = getParser(queryString, "edismax", getReq());
this.innerQuery = parser.parse();
} else {
final QParser parser = getParser(queryString, "dismax", getReq());
this.innerQuery = parser.parse();
}
} catch (final SyntaxError ex) {
throw new RuntimeException("Error parsing query", ex);
}
}
@Override
public Query parse() throws SyntaxError{
final Query query = new MyCustomQuery(innerQuery);
final CustomValuesSource customValuesSource = new CustomValuesSource(queryString,innerQuery);
final FunctionScoreQuery fsq = FunctionScoreQuery.boostByValue(query, customValuesSource.fromFloatField("score"));
return fsq;
}
}
}
public class MyCustomQuery extends Query {
@Override
public Weight createWeight(final IndexSearcher searcher, final ScoreMode scoreMode, final float boost) throws IOException {
Weight weight;
if(query == null){
weight = new ConstantScoreWeight(this, boost) {
@Override
public Scorer scorer(final LeafReaderContext context) throws IOException {
return new ConstantScoreScorer(this,score(),scoreMode, DocIdSetIterator.all(context.reader().maxDoc()));
}
@Override
public boolean isCacheable(final LeafReaderContext leafReaderContext) {
return false;
}
};
}else {
weight = searcher.createWeight(query,scoreMode,boost);
}
return weight;
}
}
public class CustomValuesSource extends DoubleValuesSource {
@Override
public DoubleValues getValues(final LeafReaderContext leafReaderContext,final DoubleValues doubleValues) throws IOException {
final DoubleValues dv = new CustomDoubleValues(leafReaderContext);
return dv;
}
class CustomDoubleValues extends DoubleValues {
@Override
public boolean advanceExact(final int doc) throws IOException {
final Document document = leafReaderContext.reader().document(doc);
final List<IndexableField> fields = document.getFields();
for (final IndexableField field : fields) {
// total_score is being calculated with my own preferences
document.add(new FloatDocValuesField("score",total_score));
//can we include the **score** here?
this custom logic which includes score is not even calling.
}
}
}
我尝试了很长时间，但还没有找到一个可行的例子。任何人都可以帮助我并在这里救我。
谢谢你，沙马拉。