[hibernate-issues] [Hibernate-JIRA] Updated: (HSEARCH-812) Faceting: Possibiltiy to set behaviour (SHOULD/MUST) when selecting multiple facets should (Elmer van Chastelet)

[Elmer van Chastelet (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Elmer van Chastelet updated HSEARCH-812:
----------------------------------------

    Attachment: HSEARCH-812-doc.diff

Added change in Doc

> Faceting: Possibiltiy to set behaviour (SHOULD/MUST) when selecting multiple facets should (Elmer van Chastelet)
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: HSEARCH-812
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-812
>             Project: Hibernate Search
>          Issue Type: Improvement
>          Components: query
>         Environment: -
>            Reporter: Elmer van Chastelet
>            Assignee: Hardy Ferentschik
>              Labels: faceting
>             Fix For: 4.0
>
>         Attachments: HSEARCH-812.diff, HSEARCH-812-doc.diff
>
>
> Current implementation combines multiple facets from the same group by OR-ing them (SHOULD):
> {code}
> private Query createSelectionGroupQuery(FacetSelectionImpl selection) {
>       BooleanQuery orQuery = new BooleanQuery();
>       for ( Facet facet : selection.getFacetList() ) {
>          orQuery.add( facet.getFacetQuery(), BooleanClause.Occur.SHOULD );
>       }
>       return orQuery;
>    }
> {code}
> It might be useful to also allow AND-ing the facets.
> Some examples:
> When searching for publications, I want the publications where both 'Kim' and 'John' are author
> When searching for recipes, I want meals with both 'tomatoes' and 'eggs'.
> This is in case of fields that might have mutliple values, so its working is relying on [HSEARCH-726|https://hibernate.onjira.com/browse/HSEARCH-726].
> I currently have adapted the code myself, to be able to set AND/OR as default facet combinator, but this is not using the Hibernate Search Query language contexts. This improvement should be easy to implement.

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