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https://issues.apache.org/jira/browse/SOLR-12519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16538477#comment-16538477
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mosh commented on SOLR-12519:
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{quote}Ultimately we'll want to utilize PathHierarchyTokenizer in some
way.{quote}
I have been playing around using this tokenizer, which is rather useful.
The problem I am currently experiencing is I have not been able to find a way
to get only children of a certain path, excluding the path. e.g.
All descendants of toppings, excluding toppings.
{code:javascript}!field f=_NEST_PATH_}toppings/{code}
The following filter returns descendants including toppings, even though I have
appended the delimiter after the path.
Even tried the following filters to no avail:
{code:javascript}((NOT _NEST_PATH_:"toppings") AND ({!field
f=_NEST_PATH_}toppings)){code}
{code:javascript}((NOT _NEST_PATH_:"*toppings") AND ({!field
f=_NEST_PATH_}toppings)){code}
> Support Deeply Nested Docs In Child Documents Transformer
> ---------------------------------------------------------
>
> Key: SOLR-12519
> URL: https://issues.apache.org/jira/browse/SOLR-12519
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: mosh
> Priority: Major
>
> As discussed in SOLR-12298, to make use of the meta-data fields in
> SOLR-12441, there needs to be a smarter child document transformer, which
> provides the ability to rebuild the original nested documents' structure.
> In addition, I also propose the transformer will also have the ability to
> bring only some of the original hierarchy, to prevent unnecessary block join
> queries. e.g.
> {code} {"a": "b", "c": [ {"e": "f"}, {"e": "g"} , {"h": "i"} ]} {code}
> Incase my query is for all the children of "a:b", which contain the key "e"
> in them, the query will be broken in to two parts:
> 1. The parent query "a:b"
> 2. The child query "e:*".
> If the only children flag is on, the transformer will return the following
> documents:
> {code}[ {"e": "f"}, {"e": "g"} ]{code}
> In case the flag was not turned on(perhaps the default state), the whole
> document hierarchy will be returned, containing only the matching children:
> {code}{"a": "b", "c": [ {"e": "f"}, {"e": "g"} ]{code}
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