How to implement nested faceting in BL ?

[Aakash]

Hello,

I have to implement nested structure in facet fields something like "product" and under product is "product versions".

Is this something can be done in BL? If yes how can we do it?

Thanks,

[Justin Coyne]

I don't know. I know Solr has hierarchical facets, I don't know if Blacklight supports it. 

Justin

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[Jonathan Rochkind]

I do not believe Blacklight has built-in any logic to use Solr's
hiearchical facet feature. (Or features?).

I am not myself familiar enough with those feature in Solr to know how
or if it would meet your need.

However, as with everything, Blacklight is intended to be a platform for
you to develop your own app. So almost anything can be done with
Blacklight, if you want to write code to develop a solution in your app,
on top of Blacklight. But you would have to write software to do it. The
first step would be understanding the relevant Solr features and how/if
they will work for your needs (I do not, myself).

On 5/13/2013 9:57 AM, Justin Coyne wrote:
> I don't know. I know Solr has hierarchical facets, I don't know if
> Blacklight supports it.
>
> Justin
>
>
> On Fri, May 10, 2013 at 2:41 PM, Aakash <javaj2ee...@gmail.com
> <mailto:javaj2ee...@gmail.com>> wrote:
>
> Hello,
>
> I have to implement nested structure in facet fields something like
> "product" and under product is "product versions".
> Is this something can be done in BL? If yes how can we do it?
>
> Thanks,
>
> --
> You received this message because you are subscribed to the Google
> Groups "Blacklight Development" group.
> To unsubscribe from this group and stop receiving emails from it,
> send an email to blacklight-develo...@googlegroups.com

> <mailto:blacklight-development%2Bunsu...@googlegroups.com>.

[Dan Funk]

http://wiki.apache.org/solr/HierarchicalFaceting

Is a great article on implementing Hierarchical facets.  I've used the facet.prefix on a large project recently with very good results.  You will need to add in some additional logic in Blacklight for rendering your hierarchical facets, and the pagination of Facets is necessarily a good bit different, but certainly possible.

On Mon, May 13, 2013 at 10:55 AM, Jonathan Rochkind <roch...@jhu.edu> wrote:

I do not believe Blacklight has built-in any logic to use Solr's hiearchical facet feature. (Or features?).

I am not myself familiar enough with those feature in Solr to know how or if it would meet your need.

However, as with everything, Blacklight is intended to be a platform for you to develop your own app. So almost anything can be done with Blacklight, if you want to write code to develop a solution in your app, on top of Blacklight. But you would have to write software to do it. The first step would be understanding the relevant Solr features and how/if they will work for your needs (I do not, myself).

On 5/13/2013 9:57 AM, Justin Coyne wrote:

I don't know. I know Solr has hierarchical facets, I don't know if
Blacklight supports it.

Justin


On Fri, May 10, 2013 at 2:41 PM, Aakash <javaj2ee...@gmail.com

<mailto:javaj2eearticles@gmail.com>> wrote:

    Hello,

    I have to implement nested structure in facet fields something like
    "product" and under product is "product versions".
    Is this something can be done in BL? If yes how can we do it?

    Thanks,

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Daniel Funk
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(540) 457-0024 | d...@lightcastletech.com

[Jessie Keck]

There is some basic support in Blacklight for pivot facets ( http://wiki.apache.org/solr/HierarchicalFaceting#Pivot_Facets )

Here is where Blacklight reads the pivot_facet section of the solr response:

https://github.com/projectblacklight/blacklight/blob/master/lib/blacklight/solr_response/facets.rb#L73-L75

The view that Blacklight renders for a configured pivot facet:

https://github.com/projectblacklight/blacklight/blob/master/app/views/catalog/_facet_pivot.html.erb

Here is the facet being configured for an app that uses a pivot facet:

https://github.com/sul-dlss/frda/blob/master/app/controllers/catalog_controller.rb#L222

NOTE: We are not showing this as a facet but we parse the response out at another time (which is why there is ":show => false" in that config line)

Hope that helps!

- Jessie

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