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From Douglas McGilvray ...@weemondo.com>
Subject Re: Drill down facet for multi valued groups of fields
Date Mon, 05 Oct 2015 21:24:45 GMT
Hi Alessandro, thanks for the reply!

I wasn’t aware of nested documents, as you say, it seems precisely what I need .. in fact
it looks like I plagiarised that article while writing my description hehe. Upgrading from
4.10 is a bit of work but, might just be worth it. 

Many Thanks!


Douglas


> On 5 Oct 2015, at 07:46, Alessandro Benedetti <benedetti.alex85@gmail.com> wrote:
> 
> Hi Douglas !
> Your use case is a really good fit for Nested Objects in Solr[1]
> After you model your problem in nested objects, you should play a little
> bit with faceting at different levels ( parent/children).
> A pivot faceting can be good  in some scenario, probably not in yours.
> I would probably suggest to explain better how you want to search over your
> documents.
> After that you can think how to facet over the children.
> 
> Cheers
> 
> [1] http://yonik.com/solr-nested-objects/
> 
> 2015-10-02 17:48 GMT+01:00 Douglas McGilvray <dm@weemondo.com>:
> 
>> Hi everyone, my first post to the list! I tried and failed to explain this
>> on IRC, I hope I can do a better job here.
>> 
>> My document has a group of text fields: company, location, year. The group
>> can have multiple values and I would like to facet (drill down) beginning
>> with any of the three fields. The order of the groups is not important.
>> 
>> Example Doc1:
>> {company1: Bolts, location1: NY, year1: 2002}
>> {company2: Nuts,  location2: SF, year2: 2010}
>> 
>> If I select two filters: fq=company:Bolts && fq=location:SF, Doc1 should
>> not be in the results, because although the two individual values occur in
>> the document, they are not within the same group.
>> 
>> Following the instructions for facet.prefix based drill down (the link
>> will explain this far better than I can)
>> 
>> https://wiki.apache.org/solr/HierarchicalFaceting#A.27facet.prefix.27__Based_Drill_Down
>> I can create a custom field lets call it cly  which represents a
>> drill-down hierarchy company > location > year
>> So For the document above it would contain the following:
>> 
>> 0:Bolts
>> 1:Bolts>NY
>> 2:Bolts>NY>2002
>> 0:Nuts
>> 1:Nuts>SF
>> 2:Nuts>SF>2010
>> 
>> I can retrieve the facets for the Company using: facet.field={!key=company
>> facet.prefix=“0:”}cly
>> 
>> If the user selects the company Bolts, I can filter the values using:
>> fq=cly:”0:Bolts”
>> And I can retrieve the facets for the location using
>> facet.field={!key=location facet.prefix=“1:Bolts”}cly
>> 
>> This is fine if I want to drill down company location year, but what if,
>> after selecting company I now want to select year? I make a field for each
>> combination of values: cly, cyl, lyc …..
>> 
>> If the user selects Bolts, I can now retrieve the facets for year using
>> facet.field={!key=year facet.prefix=“1:Bolts”}cyl (NB the order of the
>> letters here)
>> 
>> I hope the above makes sense, even if the idea itself is completely crazy.
>> Obviously the number of extra fields is factorial. I cant believe I am the
>> first person to want to do this type of search, which makes me think there
>> is probably another (better) way to do this. Is there?
>> 
>> King Regards and many thanks in advance,
>> Douglas
> 
> 
> 
> 
> -- 
> --------------------------
> 
> Benedetti Alessandro
> Visiting card - http://about.me/alessandro_benedetti
> Blog - http://alexbenedetti.blogspot.co.uk
> 
> "Tyger, tyger burning bright
> In the forests of the night,
> What immortal hand or eye
> Could frame thy fearful symmetry?"
> 
> William Blake - Songs of Experience -1794 England


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