Question

索引中的每个项目都有一个名为TYPE的字段。这是"Document", "Blog" or "Forum"

用户可以选择要搜索的TYPE，但是如果搜索“文档”，我需要添加范围查询，以便仅在"Document"字段属于STARTDATE字段时才返回using (var searcher = new IndexSearcher(_directory, false)) { var analyzer = new StandardAnalyzer(Version.LUCENE_29); BooleanQuery booleanQuery = new BooleanQuery(); BooleanQuery innerTypeFilterQuery = new BooleanQuery(); long today = Convert.ToInt64(LuceneDate.Today().Value); foreach (string filterItem in filterItems) { TermQuery filterItemQuery = new TermQuery(new Term("Type", filterItem)); innerTypeFilterQuery.Add(filterItemQuery, Occur.SHOULD); if (filterItem == "Document") { innerTypeFilterQuery.Add(NumericRangeQuery.NewLongRange("StartDate", null, today, true, true), Occur.MUST); } } if (innerTypeFilterQuery.Clauses.Count > 0) { booleanQuery.Add(innerTypeFilterQuery, Occur.MUST); } Sort sort = new Sort(new SortField(LuceneGeneric.IndexFields.StartDate, Lucene.Net.Search.SortField.LONG, true)); var hits = searcher.Search(booleanQuery, null, LuceneContentWidgetResult.HITS_LIMIT, sort).ScoreDocs; var results = _mapLuceneContentWidgetSearchResultsToDataList(hits, searcher); analyzer.Close(); searcher.Dispose(); return results; }类型有效范围

{{1}}

我的查询如下：

{+（Type：Document + StartDate：[* TO 20141022000000]类型：BlogPost类型：ForumQuestion类型：ForumIdea类型：ForumIdeaList类型：ForumDiscussion）}

Answer 1

这取决于你想要达到的目标。

我们假设您有一份文件：

title=foo
date=100 // using numeric value for simplicity

这是两种查询类型的真值表（全部以BooleanQuery形式完成）

   query                      |   doc match result
-------------------------------------------------------------------------------------
title:foo +date:[80 TO 150]   | true (both matched)
title:foo +date:[10 TO 20]    | false (date hasn't matched even though title matched)
title:boo +date:[80 TO 150]   | true (date matched but title hasn't)
title:boo +date:[10 TO 20]    | false (none matched)
-------------------------------------------------------------------------------------
title:foo date:[80 TO 150]    | true (both matched)
title:foo date:[10 TO 20]     | true (date hasn't matched but title matched)
title:boo date:[80 TO 150]    | true (date matched but title hasn't)
title:boo date:[10 TO 20]     | false (none matched)

如您所见，前4个表行的日期为MUST，后4行的日期为SHOULD。

Q＆GT;我不确定在哪里添加，我是否需要向innerTypeFilterQuery添加另一个布尔查询 A＆GT;再次，请解释您想要的匹配结果类型，但如果上述真值表的任何结果满足您的要求，您可以将其添加到同一查询中。

编辑：我认为您的查询应如下所示：

+((Type:Document +StartDate:[* TO 20141022000000]) Type:BlogPost Type:ForumQuestion Type:ForumIdea Type:ForumIdeaList Type:ForumDiscussion)

所以是的，你需要一个单独的布尔查询来包装Document约束。

Lucene Nested布尔等效于OR

1 个答案: