java - lucene中 boolean 逻辑的正确使用

Question

我对这个问题表示歉意，但这让我有点困惑。

首先，我有一组地址对象，并且我试图通过查询(以伪代码)查找相关的地址对象，该查询看起来像这样

SELECT
WHERE
     Fuzzy(addr1, "address line 1) // = true
AND
     (Fuzzy(addr2, "address line 2") OR
      Fuzzy(addrcity, "address city") OR
      //all the other address fields
     )

本质上，我想返回至少地址行第一粗略匹配的所有实体，并且地址的其他部分之一也有模糊匹配。

我已通过此查询验证数据是否存在:

Query toRun = new FuzzyQuery(new Term("addr1", getLineOne()));

这会返回包含所有正确字段的文档。

我的代码如下:

public List<Address> search() {
    List<Address> results = new ArrayList<>();

    BooleanQuery.Builder queryBuilder = new BooleanQuery.Builder();
    queryBuilder.setMinimumNumberShouldMatch(2);

    BooleanQuery.Builder subQueryBuilder = new BooleanQuery.Builder();
    subQueryBuilder.setMinimumNumberShouldMatch(1);

    if(!getLineOne().equals("")) {
        Query query = new FuzzyQuery(new Term("addr1", getLineOne()));
        queryBuilder.add(query, BooleanClause.Occur.MUST);
    }

    if(!getLineTwo().equals("")) {
        Query query = new FuzzyQuery(new Term("addr2", getLineTwo()));
        subQueryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCity().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcity", getCity()));
        subQueryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCounty().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcounty", getCounty()));
        subQueryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCountry().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcountry", getCountry()));
        subQueryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getPostcode().equals("")) {
        Query query = new FuzzyQuery(new Term("addrpostcode", getPostcode()));
        subQueryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }

    queryBuilder.add(subQueryBuilder.build(), BooleanClause.Occur.MUST);

    try {
        Query toRun = queryBuilder.build();

        List<Document> searchResults = SearchEngine.getInstance(SEARCH_ENGINE)
                .performSearch(toRun, 50);

        searchResults.forEach(result -> {
            results.add(new Address(result));
        });
    } catch (IOException e) {
        e.printStackTrace();
    }


    return results;
}

当向对象提供第一行、第二行和国家/地区时，这会生成如下文本形式的查询:

(+addr1:地址行1~2 +((addr2:地址行2~2 addrcountry:罗马尼亚~2)~1))~2

如上所述，什么也不返回。

我的逻辑哪里出了问题？

Answer 1

您需要摆脱第一个minimumShouldMatch调用。

setMinimumNumberShouldMatch 指定必须匹配的 SHOULD 子句数量。您的 queryBuilder 没有 SHOULD 子句，因此它显然无法匹配其中两个子句，因此您不会得到任何结果。

您只需删除两行 setMinimumNumberShouldMatch 行，即可获得正常运行的查询。或者，您可以使用minimumShouldMatch 逻辑并简化为仅使用一个BooleanQuery，如下所示:

public List<Address> search() {
    List<Address> results = new ArrayList<>();

    BooleanQuery.Builder queryBuilder = new BooleanQuery.Builder();
    queryBuilder.setMinimumNumberShouldMatch(1);

    if(!getLineOne().equals("")) {
        //This is a MUST clause, and so doesn't factor into the minimumShouldMatch
        Query query = new FuzzyQuery(new Term("addr1", getLineOne()));
        queryBuilder.add(query, BooleanClause.Occur.MUST);
    }

    if(!getLineTwo().equals("")) {
        Query query = new FuzzyQuery(new Term("addr2", getLineTwo()));
        queryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCity().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcity", getCity()));
        queryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCounty().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcounty", getCounty()));
        queryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getCountry().equals("")) {
        Query query = new FuzzyQuery(new Term("addrcountry", getCountry()));
        queryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }
    if(!getPostcode().equals("")) {
        Query query = new FuzzyQuery(new Term("addrpostcode", getPostcode()));
        queryBuilder.add(query, BooleanClause.Occur.SHOULD);
    }

    try {
        Query toRun = queryBuilder.build();

        List<Document> searchResults = SearchEngine.getInstance(SEARCH_ENGINE)
                .performSearch(toRun, 50);

        searchResults.forEach(result -> {
            results.add(new Address(result));
        });
    } catch (IOException e) {
        e.printStackTrace();
    }

    return results;
}