JSON Facet API usage

[crawdaddy]

Hi folks,

I must be missing something simple here, but I'm having trouble getting the JSON Facet API to work at all.  Today, I took a Solr 4.10.2 installation and swapped it out for HS 0.09.  Everything works at first blush - searching, my custom URPs and search components, etc.  However, I'm stuck moving from the Solr facet approach to the JSON approach.

For example, a standard Solr facet on field "language" can be returned using:

curl http://localhost:8983/solr/RTISearch/select -d 'rows=0&q=*:*&facet=true&facet.field=language'

The response contains the facets I expect:

{

  "responseHeader":{

    "status":0,

    "QTime":17,

    "params":{

      "facet":"true",

      "q":"*:*",

      "facet.field":"language",

      "rows":"0"}},

  "response":{"numFound":727709,"start":0,"maxScore":1.0,"docs":[]

  },

  "facet_counts":{

    "facet_queries":{},

    "facet_fields":{

      "language":[

        "en",727514,

        [... abbreviated ]

    "facet_dates":{},

    "facet_ranges":{},

    "facet_intervals":{}}}

-------------------------

Now I try the JSON API in the simple Terms Facet format, according to the guide:

curl http://localhost:8983/solr/RTISearch/select -d 'rows=0&q=*:*&

json.facet={

  lang : { terms : language }

}

'

For this or several other variations, the response contains no facets:

{

  "responseHeader":{

    "status":0,

    "QTime":13,

    "params":{

      "q":"*:*",

      "json.facet":"{\nlanguage : { terms : { field : language } }\n}\n",

      "rows":"0"}},

  "response":{"numFound":727709,"start":0,"maxScore":1.0,"docs":[]

  }}

-------------------------

No errors in the logs.  Tried issuing these requests via BASH scripts and other ways - no dice.  If I purposely malform the JSON, I get a Noggit JSON error so I know it's parsing it.  If I add "facet=true" to the request, I get an empty "facet_counts" block.

Any help would be appreciated!

[Yonik Seeley]

What type of field is "language"? multi-valued? indexed? docvalues?
The new faceting stuff doesn't have full docvalues support yet.
-Yonik

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[crawdaddy]

Hi Yonik,

Just a simple string:

<field name="language" type="string" indexed="true" stored="true"/>

[crawdaddy]

The issue was around the use of a custom component list in my search handler.  The "hs_facet" component is included in the default list, but the defaults aren't used if you specify a custom component list.  Adding "hs_facet" into my list makes it work.

[Yonik Seeley]

Ah, of course! I had missed that there wasn't even a top level
"facets" in your response. Glad you tracked it down!

-Yonik