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Question

我们使用solr版本3.5来搜索推文,我使用WordDelimiterFactory以下设置,以便能够搜索@username或#hashtags:

<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="0" splitOnNumerics="0" preserveOriginal="1" handleAsChar="@#"/>

我看到了以下补丁,但这似乎没有像我预期的那样工作,我错过了什么？

https://issues.apache.org/jira/browse/SOLR-2059

但是搜索@username也#hashtag只返回用户名的结果,或者只返回hastag的结果.我怎样才能做到这一点？

整个字段类型:

<fieldType name="textnostem" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true">
  <analyzer type="index">
    <charFilter class="solr.HTMLStripCharFilterFactory"/>
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"
            />
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"/>
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>

<fieldType name="textnostem" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true">
  <analyzer type="index">
    <charFilter class="solr.HTMLStripCharFilterFactory"/>
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"
            />
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"/>      
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

<fieldType name="textnostem" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true">
  <analyzer type="index">
    <charFilter class="solr.HTMLStripCharFilterFactory"/>
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"
            handleAsChar="@#"
            />
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.WhitespaceTokenizerFactory"/>
    <filter class="solr.StopFilterFactory"
            ignoreCase="true"
            words="stopwords.txt"
            enablePositionIncrements="true"
            />
    <filter class="solr.WordDelimiterFilterFactory" 
            generateWordParts="1" 
            generateNumberParts="1" 
            catenateWords="1" 
            catenateNumbers="1" 
            catenateAll="0" 
            splitOnCaseChange="0" 
            splitOnNumerics="0"
            preserveOriginal="1"
            handleAsChar="@#"
            />      
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

Answer 1

好的,所以阅读你提到的SOLR-2059补丁,看起来他们已经用handleAsChar属性替换了WordDelimiterFactory上的types属性.以下是分析器,Tokenizers和Token Filters Solr Wiki页面中该属性的规范:

types ="wdfftypes.txt"允许为此过滤器自定义标记化.该文件应存在于solr/conf目录中,条目的格式为(不含引号)"%=> ALPHA"或"\ u002C => DIGIT".允许的类型有:LOWER,UPPER,ALPHA,DIGIT,ALPHANUM,SUBWORD_DELIM.

那么如果我们采用这个文档,再加上SOLR-2059的文件示例,我建议如下:

<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="0" splitOnNumerics="0" preserveOriginal="1" types="twittertypes.txt"/>

然后按如下所示定义twittertypes.txt文件,并将其放在与Solr实例中的schema.xml文件相同的文件夹中(可能是conf文件夹).

 # A customized type mapping for WordDelimiterFilterFactory
 # the allowable types are: LOWER, UPPER, ALPHA, DIGIT, ALPHANUM, SUBWORD_DELIM
 #    
 # the default for any character without a mapping is always computed from 
 # Unicode character properties

 # Map the $, %, '.', and ',' characters to DIGIT 
 # This might be useful for financial data.
 @ => ALPHA
 \u0023 => ALPHA

请注意,您需要将Unicode字符(UTF-8)用于哈希符号,因为它在文本文件中被视为注释.

根据所有文档,这应该解决您的问题并将#和@符号视为字母字符,这将提供您正在寻找的行为.