Apache Solr 中的外部文件字段 [英] External File Field in Apache Solr

问题描述

我一直在尝试使用 ApacheSolr 中的 ExternalFileField 进行外部评分.

I've been trying to use ExternalFileField in ApacheSolr for external scoring.

我正在使用示例配置.基本上我想使用它们的 id 为项目设置分数.

I'm using the example config. Basically I want to set scores for items using their ids.

我在schema.xml中设置了fieldType idRankFile和字段idRank:

I set the fieldType idRankFile and field idRank in schema.xml:

<fieldType name="idRankFile" keyField="id" defVal="0" stored="true" indexed="true" class="solr.ExternalFileField" valType="pfloat" />
<field name="idRank" type="idRankFile" indexed="true" stored="true" />

并在/solr/example/solr/data 中创建了一个名为 external_idRank 的文件，内容如下:

And made a file called external_idRank in /solr/example/solr/data with the following content:

F8V7067-APL-KIT = 1.0
IW-02 = 10.0
9885A004 = 100.0
SOLR1000 = 1000.0

(这会为各种 id 分配 idRank 值)

(This assigns idRank values for various ids)

现在我运行以下查询:

http://localhost:8983/solr/select/?indent=on&q=car%20power%20adapter%20_val_:%22product(idRank,1)%22&fl=name,id

这应该基本上按照 idRank 的顺序返回结果.然而，事实并非如此.

This should basically return the results in order of their idRanks. However, it does not.

有什么想法吗?

推荐答案

好的，所以我遇到了同样的问题.这就是我所做的:

Alright, so I had the same problem. This is what I did:

1. 创建文件:
   solr_home/PROJECT/multicore/core1/data/external_popularProducts.txt

该文件应包含如下值:
uniqueID_in_core=count

示例:
873728721=19
842728342=20

更新schema.xml，在 下添加这个</types>

Update schema.xml, add this under <types> </types>
<fieldType name="popularProductsFile" keyField="key" defVal="0" stored="true" indexed="true" class="solr.ExternalFileField" valType="float" />

这里，key是solr core的primaryID的列名.
在
下添加

Here, key is the column name for the primaryID of solr core.
Add this under <fields></fields>
<field name="popularProducts" type="popularProductsFile" indexed="true" stored="true" />

重新加载内核.我正在使用有错误的 solr4.3.当我尝试重新加载任何核心时，solrcloud 节点出现故障.SOLR-4805:SolrCloud - 集合或核心上的重新加载使集合离线且无法使用，直到重新启动 .所以，我不得不重新启动我的 solrcloud 节点.

Reload the core. I am using solr4.3 which has a bug. When I try to reload any core,the solrcloud node goes down. SOLR-4805: SolrCloud - RELOAD on collections or cores leaves collection offline and unusable till restart . So, I had to restart my solrcloud nodes.

查询:http://SOLR_NODE:8983/solr/core1/select?q=ipad&sort=popularProducts desc

注意:
大多数关于 ExternalFileField 的博客都不完全准确.所以只需参考原始文档:

Note:
Most of the blogs written about ExternalFileField are not completely accurate. So just refer to the original documentation:

1. http://lucene.apache.org/solr/4_3_1/solr-core/org/apache/solr/schema/ExternalFileField.html .
2. http://docs.lucidworks.com/display/solr/Working+with+External+Files+and+Processes

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