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https://issues.apache.org/jira/browse/SOLR-5829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-5829:
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Comment: was deleted
(was: Initial patch leverages the existing tag/exclude framework for
tag/exclude faceting. Runs but needs tests.)
> Allow ExpandComponent to accept query and filter query parameters
> -----------------------------------------------------------------
>
> Key: SOLR-5829
> URL: https://issues.apache.org/jira/browse/SOLR-5829
> Project: Solr
> Issue Type: New Feature
> Components: SearchComponents - other
> Reporter: Joel Bernstein
> Fix For: 4.8
>
> Attachments: SOLR-5829.patch
>
>
> By default the ExpandComponent re-runs both the main query and filter queries
> to expand the groups. This ticket allows you to pass the main query and
> filter queries into the ExpandComponent. It also allows you to pass in the
> expand field.
> This design allows the ExpandComponent to operate independently of the
> CollapsingQParserPlugin and allows for modeling of parent/child
> relationships.
> For example:
> {code}
> q=*:*&fq=type:parent&expand=true&expand.field=group_id&expand.q=*:*&expand.fq=type:child
> {code}
> In the query above the the main query returns all documents of the
> type:parent. The ExpandComponent then expands the groups by retrieving all
> documents with type:child and grouping them by the group_id.
> In other words, the main result set will be the parent documents and the
> expanded result set will be the child documents.
> You could reverse this as well:
> {code}
> q=*:*&fq=type:child&fq={!collapse
> field=group_id}&expand=true&expand.field=group_id&expand.q=*:*&expand.fq=type:parent
> {code}
> In the query above the main query returns all documents with type:child and
> collapses them on the group_id field. The ExpandComponent then expands the
> groups by retrieving all documents with type:parent and groups them by
> group_id. Since there is only one parent per collapsed child, each group will
> have one document 1 document.
> In this case the main result set will be collapsed child documents and the
> expanded results will be parent documents.
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