Re: how does facets work
Hey Small correction: When using the global flag, facets ignore the query. See http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets.html#_scope That might help in your case (though from my experience it is likely that you will end up with a couple of facets, from which each has a different facet filter. But your mileage may vary). --Alex On Fri, Dec 27, 2013 at 6:58 PM, Ivan Brusic wrote: > Facets work on the documents returned by the query. This behavior will > not work in your case since you would like to gather facets on a greater > set of documents, not just the ones returned by the query. To solve this > issue, elasticsearch provides a post filter, which affects the result > document set, but not the set of documents that the facets work on. > > The term "filter" is a bit overloaded in elasticsearch, so the team > renamed the post filter to a more explicit "post_filter": > > > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-post-filter.html > https://github.com/elasticsearch/elasticsearch/issues/4119 > > The post filter documentation has some insight on how the filters affect > the facets. In your case, you want a filtered query ( > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-filtered-query.html > ) > with the color as the filter, but the model filter will be applied as a > post filter. Hopefully this makes sense. :) > > Cheers, > > Ivan > > > On Fri, Dec 27, 2013 at 9:41 AM, Volker wrote: > >> Dear Readers >> >> I have a question about facets and doing some filtering based on facets. >> >> In the moment I am using hibernate search in combination with bobobrowse >> for facetting and I am thinking about switching to ES. But before that I >> would like to check whether I can still get the same functionality. >> >> lets asume that I have an index about cars and some facets -- eg. model >> and color. >> >> color >> [ ] red (10) >> [ ] blue (5) >> [ ] green (2) >> >> model >> [ ] bmw (4) >> [ ] vw (5) >> [ ] ford (8) >> >> if I select a model I would like to get only color facets for that model, >> but I still would like to get facets for all models. eg: >> >> color >> [ ] red (2) >> [ ] blue (2) >> [ ] green (1) >> >> model >> [ ] bmw (4) >> [x] vw (5) >> [ ] ford (8) >> >> I have searched I did not find an example about this usecase. Is this >> possible and if yes, how do I filter a query to get these results? >> >> Kind regards >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "elasticsearch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to elasticsearch+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418%40googlegroups.com >> . >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDj9Q9EsfvH5%2BE1AkZiCZLVuq3RZkSrRFeaW_NM3Uc6Gw%40mail.gmail.com > . > > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAGCwEM-FX_La_JB3kyEp7af%2B3A2hEQ2DQ2x0skFi-c_fFppPjw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how does facets work
Dear Ivan thank you very much for your fast and helpful response. I will create some demo data and play with your snippet. I really appreciate your help! btw... I think my scenario is a very standard scenario for working with facets -- e.g. every online shop is working in this fashion with facets. kind regards Volker Am Montag, 30. Dezember 2013 18:36:31 UTC+1 schrieb Ivan Brusic: > > After reading your scenario again, I have modified slightly my suggestion. > You would still need to use a post filter since the facets need to work on > set of documents that is greater than the set returned. You can apply the > same post filter as a facet filter on the facet you want to reduce. Here is > an example: > > https://gist.github.com/brusic/8185134 > > -- > Ivan > > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/18a41661-021b-4833-86f1-423223da7a20%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how does facets work
After reading your scenario again, I have modified slightly my suggestion. You would still need to use a post filter since the facets need to work on set of documents that is greater than the set returned. You can apply the same post filter as a facet filter on the facet you want to reduce. Here is an example: https://gist.github.com/brusic/8185134 -- Ivan On Mon, Dec 30, 2013 at 7:57 AM, Volker wrote: > >Hopefully this makes sense. :) > > after reading through your provided links... not totally ;-) > > If I apply the selected facet before the the facet calculation, the facet > will count only elements, that are part of the result. That would mean, > that I would not get numbers for the not selected models (in this case no > numbers for bmw and ford). > > If I apply the selected facet as a post_filter, I will get the correct > numbers for the unselected models, but the facets for the color does not > represent the numbers for the selected model, but for all models. > > But probably I have not understood it, as it was meant. :-) > > Could you please elaborate further, how the query/filter for a selected > facet should be formulated? I have not found any example for this. If there > is one online, I would appreciate a link to that example. > > Kind regards > > > > Am Freitag, 27. Dezember 2013 18:58:13 UTC+1 schrieb Ivan Brusic: > >> Facets work on the documents returned by the query. This behavior will >> not work in your case since you would like to gather facets on a greater >> set of documents, not just the ones returned by the query. To solve this >> issue, elasticsearch provides a post filter, which affects the result >> document set, but not the set of documents that the facets work on. >> >> The term "filter" is a bit overloaded in elasticsearch, so the team >> renamed the post filter to a more explicit "post_filter": >> >> http://www.elasticsearch.org/guide/en/elasticsearch/ >> reference/current/search-request-post-filter.html >> https://github.com/elasticsearch/elasticsearch/issues/4119 >> >> The post filter documentation has some insight on how the filters affect >> the facets. In your case, you want a filtered query ( >> http://www.elasticsearch.org/guide/en/elasticsearch/ >> reference/current/query-dsl-filtered-query.html ) with the color as the >> filter, but the model filter will be applied as a post filter. Hopefully >> this makes sense. :) >> >> Cheers, >> >> Ivan >> >> >> On Fri, Dec 27, 2013 at 9:41 AM, Volker wrote: >> >>> Dear Readers >>> >>> I have a question about facets and doing some filtering based on facets. >>> >>> In the moment I am using hibernate search in combination with bobobrowse >>> for facetting and I am thinking about switching to ES. But before that I >>> would like to check whether I can still get the same functionality. >>> >>> lets asume that I have an index about cars and some facets -- eg. model >>> and color. >>> >>> color >>> [ ] red (10) >>> [ ] blue (5) >>> [ ] green (2) >>> >>> model >>> [ ] bmw (4) >>> [ ] vw (5) >>> [ ] ford (8) >>> >>> if I select a model I would like to get only color facets for that >>> model, but I still would like to get facets for all models. eg: >>> >>> color >>> [ ] red (2) >>> [ ] blue (2) >>> [ ] green (1) >>> >>> model >>> [ ] bmw (4) >>> [x] vw (5) >>> [ ] ford (8) >>> >>> I have searched I did not find an example about this usecase. Is this >>> possible and if yes, how do I filter a query to get these results? >>> >>> Kind regards >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "elasticsearch" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to elasticsearc...@googlegroups.com. >>> >>> To view this discussion on the web visit https://groups.google.com/d/ >>> msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418% >>> 40googlegroups.com. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/2609a3ee-1124-4bc1-95e6-c6e7cdb06128%40googlegroups.com > . > > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQC1i0wUL2gMVEt37PdZLNZXyTi7PTNGKUzDedR6Gpx-5w%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how does facets work
>Hopefully this makes sense. :) after reading through your provided links... not totally ;-) If I apply the selected facet before the the facet calculation, the facet will count only elements, that are part of the result. That would mean, that I would not get numbers for the not selected models (in this case no numbers for bmw and ford). If I apply the selected facet as a post_filter, I will get the correct numbers for the unselected models, but the facets for the color does not represent the numbers for the selected model, but for all models. But probably I have not understood it, as it was meant. :-) Could you please elaborate further, how the query/filter for a selected facet should be formulated? I have not found any example for this. If there is one online, I would appreciate a link to that example. Kind regards Am Freitag, 27. Dezember 2013 18:58:13 UTC+1 schrieb Ivan Brusic: > > Facets work on the documents returned by the query. This behavior will > not work in your case since you would like to gather facets on a greater > set of documents, not just the ones returned by the query. To solve this > issue, elasticsearch provides a post filter, which affects the result > document set, but not the set of documents that the facets work on. > > The term "filter" is a bit overloaded in elasticsearch, so the team > renamed the post filter to a more explicit "post_filter": > > > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-post-filter.html > https://github.com/elasticsearch/elasticsearch/issues/4119 > > The post filter documentation has some insight on how the filters affect > the facets. In your case, you want a filtered query ( > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-filtered-query.html > ) > with the color as the filter, but the model filter will be applied as a > post filter. Hopefully this makes sense. :) > > Cheers, > > Ivan > > > On Fri, Dec 27, 2013 at 9:41 AM, Volker >wrote: > >> Dear Readers >> >> I have a question about facets and doing some filtering based on facets. >> >> In the moment I am using hibernate search in combination with bobobrowse >> for facetting and I am thinking about switching to ES. But before that I >> would like to check whether I can still get the same functionality. >> >> lets asume that I have an index about cars and some facets -- eg. model >> and color. >> >> color >> [ ] red (10) >> [ ] blue (5) >> [ ] green (2) >> >> model >> [ ] bmw (4) >> [ ] vw (5) >> [ ] ford (8) >> >> if I select a model I would like to get only color facets for that model, >> but I still would like to get facets for all models. eg: >> >> color >> [ ] red (2) >> [ ] blue (2) >> [ ] green (1) >> >> model >> [ ] bmw (4) >> [x] vw (5) >> [ ] ford (8) >> >> I have searched I did not find an example about this usecase. Is this >> possible and if yes, how do I filter a query to get these results? >> >> Kind regards >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "elasticsearch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to elasticsearc...@googlegroups.com . >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418%40googlegroups.com >> . >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/2609a3ee-1124-4bc1-95e6-c6e7cdb06128%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how does facets work
Dear Ivan thank you very much for your pointers. I will read through it and come back, if I have further questions! thanks Am Freitag, 27. Dezember 2013 18:58:13 UTC+1 schrieb Ivan Brusic: > > Facets work on the documents returned by the query. This behavior will > not work in your case since you would like to gather facets on a greater > set of documents, not just the ones returned by the query. To solve this > issue, elasticsearch provides a post filter, which affects the result > document set, but not the set of documents that the facets work on. > > The term "filter" is a bit overloaded in elasticsearch, so the team > renamed the post filter to a more explicit "post_filter": > > > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-post-filter.html > https://github.com/elasticsearch/elasticsearch/issues/4119 > > The post filter documentation has some insight on how the filters affect > the facets. In your case, you want a filtered query ( > http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-filtered-query.html > ) > with the color as the filter, but the model filter will be applied as a > post filter. Hopefully this makes sense. :) > > Cheers, > > Ivan > > > On Fri, Dec 27, 2013 at 9:41 AM, Volker >wrote: > >> Dear Readers >> >> I have a question about facets and doing some filtering based on facets. >> >> In the moment I am using hibernate search in combination with bobobrowse >> for facetting and I am thinking about switching to ES. But before that I >> would like to check whether I can still get the same functionality. >> >> lets asume that I have an index about cars and some facets -- eg. model >> and color. >> >> color >> [ ] red (10) >> [ ] blue (5) >> [ ] green (2) >> >> model >> [ ] bmw (4) >> [ ] vw (5) >> [ ] ford (8) >> >> if I select a model I would like to get only color facets for that model, >> but I still would like to get facets for all models. eg: >> >> color >> [ ] red (2) >> [ ] blue (2) >> [ ] green (1) >> >> model >> [ ] bmw (4) >> [x] vw (5) >> [ ] ford (8) >> >> I have searched I did not find an example about this usecase. Is this >> possible and if yes, how do I filter a query to get these results? >> >> Kind regards >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "elasticsearch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to elasticsearc...@googlegroups.com . >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418%40googlegroups.com >> . >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/85f17064-1226-4f0b-9435-2b17790afd4e%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: how does facets work
Facets work on the documents returned by the query. This behavior will not work in your case since you would like to gather facets on a greater set of documents, not just the ones returned by the query. To solve this issue, elasticsearch provides a post filter, which affects the result document set, but not the set of documents that the facets work on. The term "filter" is a bit overloaded in elasticsearch, so the team renamed the post filter to a more explicit "post_filter": http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-post-filter.html https://github.com/elasticsearch/elasticsearch/issues/4119 The post filter documentation has some insight on how the filters affect the facets. In your case, you want a filtered query ( http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-filtered-query.html ) with the color as the filter, but the model filter will be applied as a post filter. Hopefully this makes sense. :) Cheers, Ivan On Fri, Dec 27, 2013 at 9:41 AM, Volker wrote: > Dear Readers > > I have a question about facets and doing some filtering based on facets. > > In the moment I am using hibernate search in combination with bobobrowse > for facetting and I am thinking about switching to ES. But before that I > would like to check whether I can still get the same functionality. > > lets asume that I have an index about cars and some facets -- eg. model > and color. > > color > [ ] red (10) > [ ] blue (5) > [ ] green (2) > > model > [ ] bmw (4) > [ ] vw (5) > [ ] ford (8) > > if I select a model I would like to get only color facets for that model, > but I still would like to get facets for all models. eg: > > color > [ ] red (2) > [ ] blue (2) > [ ] green (1) > > model > [ ] bmw (4) > [x] vw (5) > [ ] ford (8) > > I have searched I did not find an example about this usecase. Is this > possible and if yes, how do I filter a query to get these results? > > Kind regards > > > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to elasticsearch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418%40googlegroups.com > . > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CALY%3DcQDj9Q9EsfvH5%2BE1AkZiCZLVuq3RZkSrRFeaW_NM3Uc6Gw%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
how does facets work
Dear Readers I have a question about facets and doing some filtering based on facets. In the moment I am using hibernate search in combination with bobobrowse for facetting and I am thinking about switching to ES. But before that I would like to check whether I can still get the same functionality. lets asume that I have an index about cars and some facets -- eg. model and color. color [ ] red (10) [ ] blue (5) [ ] green (2) model [ ] bmw (4) [ ] vw (5) [ ] ford (8) if I select a model I would like to get only color facets for that model, but I still would like to get facets for all models. eg: color [ ] red (2) [ ] blue (2) [ ] green (1) model [ ] bmw (4) [x] vw (5) [ ] ford (8) I have searched I did not find an example about this usecase. Is this possible and if yes, how do I filter a query to get these results? Kind regards -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/9d1f3008-aff2-4936-8e6c-7611734e7418%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
