We've been doing some work on heirarchical faceting as part of the
BioSolr project:
https://github.com/flaxsearch/BioSolr/tree/master/spot/solr-hierarchical-facet
This is mainly to support indexing of biological ontologies/taxonomies.
Cheers
Charlie
On 28/07/2015 17:19, Alessandro Benedetti wrote:
Hi Peter,
yeah, i briefly read it, it seems quite similar !
There is no problem I can see yet with Multi values.
The token produced will be properly managed.
Cheers
2015-07-28 17:06 GMT+01:00 PeterKerk <petervdk...@hotmail.com>:
Oh and one more thing, I was Googling on this and found
http://www.springyweb.com/2012/01/hierarchical-faceting-with-elastic.html,
so apparently your solution is similar to this: hierarchical Faceting With
Elastic Search?
So does your solution facilitate for items to be in multiple categories?
e.g. a product may be in:
Man
Man > top
Man > top > shirt
Man > top > shirt> sleeveless shirt
AND also fall under:
Clothing
Clothing > shirt
Clothing > shirt> sleeveless shirt
Thanks again!
From: Alessandro Benedetti [via Lucene]
Sent: Tuesday, July 28, 2015 10:26
To: PeterKerk
Subject: Re: Use faceted search to drill down in hierarchical structure
and omit node data outside current selection
The fact is that you are trying to model a hierarchical facet on documents
that actually index the content as a simple field.
What I would suggest for example is to use a PathhierarcyTokenizer for your
field with a proper separator.
This will produce these tokens in the index :
input : Man > top > shirt > sleeveless shirt
Tokenized :
Man
Man > top
Man > top > shirt
Man > top > shirt> sleeveless shirt
At this point your counting will be exactly what you would like, you need
only to parse it Search API side and model the hierarchical facets in
nested elements.
Cheers
2015-07-28 2:02 GMT+01:00 PeterKerk <[hidden email]>:
I have the following structure for my products, where a product may fall
into
multiple categories. In my case, a "caketopper", which would be under
"cake/caketoppers" as well as "caketoppers" (don't focus on the logic
behind
the category structure in this example).
Category structure:
cake
caketoppers
funny
caketoppers
funny
What I want is that when the user has chosen a category on level 0 (the
main
category selection), in this case 'caketoppers', I don't want to return
the
attributes/values that same product has because it's also in a different
category.
I tried the following queries, but it keeps returning all data:
&f.slug_nl_0.facet.prefix=(caketoppers)&fq=slug_nl_0:"(caketoppers)"
&f.slug_nl_0.facet.prefix="caketoppers"&fq=slug_nl_0:"(caketoppers)"
I keep getting this result (cleaned for better readability):
<result name="response" numFound="6" start="0">
<doc>
<arr name="slug_nl_0">
<str>caketoppers</str>
<str>cake</str>
</arr>
</doc>
</result>
<lst name="facet_counts">
<lst name="facet_fields">
<lst name="slug_nl_0">
<int name="cake">6</int>
<int name="caketoppers">6</int>
</lst>
</lst>
</lst>
But my desired result would be:
<result name="response" numFound="6" start="0">
<doc>
<arr name="slug_nl_0">
<str>caketoppers</str>
</arr>
</doc>
</result>
<lst name="facet_counts">
<lst name="facet_fields">
<lst name="slug_nl_0">
<int name="caketoppers">6</int>
</lst>
</lst>
</lst>
field definition of 'slug_nl_0' in schema.xml:
<field name="slug_nl_0" type="text" indexed="true" stored="true"
multiValued="true"/>
I also tried with a more simple query but I'm getting the exact same
results:
&facet.prefix=caketoppers&fq=slug_nl_0:caketoppers
I then was reading into grouping:
http://wiki.apache.org/solr/FieldCollapsing
So I tried adding that in my queries, but I get errors:
`&fq=slug_nl_0:taarttoppers&group=true&group.facet=true&group.field=slug_nl_0`
error: can not use FieldCache on multivalued field: slug_nl_0
`&fq=slug_nl_0:taarttoppers&group=true&group.field=slug_nl_0`
error: can not use FieldCache on multivalued field: slug_nl_0
`&fq=slug_nl_0:taarttoppers&group.facet=true&group.field=slug_nl_0`
error: Specify the group.field as parameter or local parameter
And then I noticed this at the bottom of the page:
Known Limitations Support for grouping on a multi-valued field has not
yet been implemented.
On that same Solr FieldCollapsing example page they refer to Best Buy as
an
example. Now I wonder how that was implemented without support for
multivalued fields.
What can I do?
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