Sitecore Search Predicate Builder具有增强功能的多个关键字搜索无法正常工作 [英] Sitecore Search Predicate Builder multiple keyword search with boosting not working as desired
问题描述
我有具有以下字段的站点核心页面/lucene文档:
I have sitecore pages / lucene documents with the following fields:
- 标题
- 文件名
- 内容
- 文件内容
我正在搜索这些文件,并且具有以下要求:
I'm creating a search for these and have the following requirements:
- 应该首先返回在 title 字段中包含整个短语的匹配项.
- 在 filename 字段中包含整个短语的命中应返回第二个.
- 在 content 中包含整个短语的命中应返回第三
- 在文件内容中包含整个短语的命中应返回第四
- 在 title字段中包含 all 个关键字(任意顺序)的命中应返回第五个
- 在 filename字段中包含 all 个关键字(任意顺序)的命中应返回第六个
- 在 content 中包含 all 个关键字(任意顺序)的命中应返回第七个.
- 在文件内容中包含 all 个关键字(任意顺序)的命中应返回第八.
- Hits containing the whole phrase in the title field should be returned first.
- Hits containing the whole phrase in the filename field should be returned second.
- Hits containing the whole phrase in the content should be returned third
- Hits containing the whole phrase in the file contents should be returned fourth
- Hits containing all of the keywords (in any order) in the title field should be returned fifth
- Hits containing all of the keywords (in any order) in the filename field should be returned sixth
- Hits containing all of the keywords (in any order) in the content should be returned seventh.
- Hits containing all of the keywords (in any order) in the file contents should be returned eighth.
这就是我所拥有的:
public static Expression<Func<T, bool>> GetSearchTermPredicate<T>(string searchTerm)
where T : ISearchableItem
{
var actualPhrasePredicate = PredicateBuilder.True<T>()
.Or(r => r.Title.Contains(searchTerm).Boost(2f))
.Or(r => r.FileName.Contains(searchTerm).Boost(1.5f))
.Or(r => r.Content.Contains(searchTerm))
.Or(r => r.DocumentContents.Contains(searchTerm));
var individualWordsPredicate = PredicateBuilder.False<T>();
foreach (var term in searchTerm.Split(' '))
{
individualWordsPredicate
= individualWordsPredicate.And(r =>
r.Title.Contains(term).Boost(2f)
|| r.FileName.Contains(term).Boost(1.5f)
|| r.Content.Contains(term)
|| r.DocumentContents.Contains(term));
}
return PredicateBuilder.Or(actualPhrasePredicate.Boost(2f),
individualWordsPredicate);
}
实际短语部分似乎运行良好.标题中带有完整短语的匹配将首先返回.但是,如果我从词组的中间删除一个单词,则不会返回任何结果.
The actual phrase part seems to work well. Hits with the full phrase in the title are returned first. However, if I remove a word from the middle of the phrase, no results are returned.
即我有一个标题为英格兰足球队令人恐惧"的页面,但是当我搜索英格兰足球队令人恐惧"时,找不到该页面.
i.e. I have a page with a title "The England football team are dreadful", but when I search with "The football team are dreadful", it doesn't find the page.
注意:页面上可以附加文档,所以我也想增加文件名,但不如页面标题那么高.
Note: pages can have documents attached to them, so I want to boost the filenames too but not as highly as the page title.
推荐答案
我设法将其与以下各项配合使用:
I managed to get this to work with the following:
public static Expression<Func<T, bool>> GetSearchTermPredicate<T>(string searchTerm)
where T : ISearchableItem
{
var actualPhraseInTitlePredicate = PredicateBuilder.True<T>()
.And(r => r.Title.Contains(searchTerm));
var actualPhraseInFileNamePredicate = PredicateBuilder.True<T>()
.And(r => r.FileName.Contains(searchTerm));
var actualPhraseInContentPredicate = PredicateBuilder.True<T>()
.And(r => r.Content.Contains(searchTerm));
var actualPhraseInDocumentPredicate = PredicateBuilder.True<T>()
.And(r => r.DocumentContents.Contains(searchTerm));
var terms = searchTerm.Split(' ');
var titleContainsAllTermsPredicate = PredicateBuilder.True<T>();
foreach (var term in terms)
titleContainsAllTermsPredicate
= titleContainsAllTermsPredicate.And(r => r.Title.Contains(term).Boost(2f));
var fileNameAllTermsContains = PredicateBuilder.True<T>();
foreach (var term in terms)
fileNameAllTermsContains
= fileNameAllTermsContains.And(r => r.FileName.Contains(term));
var contentContainsAllTermsPredicate = PredicateBuilder.True<T>();
foreach (var term in terms)
contentContainsAllTermsPredicate
= contentContainsAllTermsPredicate.And(r => r.Content.Contains(term));
var documentContainsAllTermsPredicate = PredicateBuilder.True<T>();
foreach (var term in terms)
documentContainsAllTermsPredicate
= documentContainsAllTermsPredicate.And(r => r.DocumentContents.Contains(term));
var predicate = actualPhraseInTitlePredicate.Boost(3f)
.Or(actualPhraseInFileNamePredicate.Boost(2.5f))
.Or(actualPhraseInContentPredicate.Boost(2f))
.Or(actualPhraseInDocumentPredicate.Boost(1.5f))
.Or(titleContainsAllTermsPredicate.Boost(1.2f))
.Or(fileNameAllTermsContains.Boost(1.2f))
.Or(contentContainsAllTermsPredicate)
.Or(documentContainsAllTermsPredicate);
return predicate;
}
显然有很多代码,但是我认为分离谓词对于提高工作效率更有意义.
It's obviously quite a bit more code, but I think separating the predicates makes more sense for boosting to work effectively.
先前代码的主要问题有两个方面:
The main issue with the previous code was two fold:
-
PredicateBuilder.Or(actualPhrasePredicate.Boost(2f), individualWordsPredicate)
似乎不包含谓词Or'd.在结果联接谓词上执行.ToString()
时,该表达式不包含individualWordsPredicate
的任何内容
- 修复后,它仍然不起作用,这是因为我在
individualWordsPredicate
中使用了PredicateBuilder.False<T>()
.当看表达式时,它基本上是产生(False AND Field.Contains(keyword))
,当然,它永远不会评估为true.使用.True<T>()
修复此问题.
PredicateBuilder.Or(actualPhrasePredicate.Boost(2f), individualWordsPredicate)
doesn't seem to include the predicate being Or'd. When doing a.ToString()
on the resulting joined predicate, the expression didn't contain anything for theindividualWordsPredicate
- After fixing that it still didn't work, and this was because I was using
PredicateBuilder.False<T>()
for theindividualWordsPredicate
. When looking at the expression it was basically producing(False AND Field.Contains(keyword))
which of course will never evaluate to true. Using.True<T>()
fixed this.
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