如何在SOLR查询中排除字段

问题描述

我有一个SOLR查询，该查询应获取除一个字段外的所有我存储的字段.
假设我有 20 个字段，是否需要对要在
中获取的 19 个字段进行硬编码&fl=[f],[f],[f],....[f]'
还是有办法做类似
的事情&fl=*,![f]'

I have a SOLR query which should fetch all the fields I store, except one field.
Say I have 20 fields, do I need to hard code the 19 fields I want to fetch in the
&fl=[f],[f],[f],....[f]'
Or is there a way to do something similar to
&fl=*,![f]'

[f]代表字段名称.

推荐答案

不幸的是，通过查询字符串删除字段名称的能力仍然是一项突出的改进请求.有关更多详细信息，请参见 SOLR-3191 .

Unfortunately the ability to remove a field name via the query string is still an outstanding improvement request. Please see SOLR-3191 for more details.

在实施此改进之前，您需要在fl参数中指定所有19个字段.但是，您可以更新默认的/select requestHandler，以定义要作为默认设置返回的19个字段，该字段将应用于所有查询，除非在查询字符串中将其覆盖.

Until this improvement is implemented, you will need to specify all 19 fields in the fl parameter. However, you could update your default /select requestHandler to define the 19 fields that you want to return as a default setting that would be applied to all queries unless it was overridden in the query string.

这是来自示例solrconfig.xml的默认/select requestHandler的修改版本:

Here is a modified version of the default /select requestHandler from the example solrconfig.xml:

  <requestHandler name="/select" class="solr.SearchHandler">
    <!-- default values for query parameters can be specified, these
     will be overridden by parameters in the request
     -->
    <lst name="defaults">
      <str name="echoParams">explicit</str>
      <int name="rows">10</int>
      <str name="df">text</str>
      <!-- Only showing 3 fields for this example -->
      <str name="fl">field1,field2,field3</str>
    </lst>
  </requestHandler>

有关这些默认设置和requestHandler配置的更多详细信息，请参考 RequestHandlers和SearchComponents在SolrConfig中.

For more details about these default settings and requestHandler configuration, please refer to RequestHandlers and SearchComponents in SolrConfig.

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