solr - Get possible facet fields with search results -

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i'm working on improving search powered solr e-commerce project. search queries performed solr , results returned solr.

this working fine. need offer facet on search results. first category easy implement category common product , in query make enable facet , pass category facet field.

however, different nature of products there different products , have few facets defined them.

i'm clueless how know them in advance , pass in solr search query? solr return facet field queries along search results? if yes, how?

if no, correct way proceed further.

pass unique facet field name on want make facet filtering, , records have facet field.


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