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https://issues.apache.org/jira/browse/SOLR-12441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16532718#comment-16532718
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mosh edited comment on SOLR-12441 at 7/4/18 2:25 PM:
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I have been thinking about a special case where a child documents within an 
array has other children.
 Perhaps we should keep inside the _NEST_PATH_ field the child documents' index 
in the hierarchy. e.g.
{code:javascript}
{"_NEST_PATH_": "book/pages/3//footnote"}{code}
Or perhaps it should be:
{code:java}
{"_NEST_PATH_": "book/0//pages/3//footnote/0/"}{code}
WDYT?


was (Author: moshebla):
I have been thinking about a special case where a child documents within an 
array has other children.
 Perhaps we should keep inside the _NEST_PATH_ field the child documents' index 
in the hierarchy. e.g.
{code:javascript}
{"_NEST_PATH_": "book/pages[3]/footnote"}{code}
Or perhaps it should be:
{code}{"_NEST_PATH_": "book[0]/pages[3]/footnote[0]"}{code}
WDYT?

> Add deeply nested documents URP
> -------------------------------
>
>                 Key: SOLR-12441
>                 URL: https://issues.apache.org/jira/browse/SOLR-12441
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: mosh
>            Assignee: David Smiley
>            Priority: Major
>          Time Spent: 4h 40m
>  Remaining Estimate: 0h
>
> As discussed in 
> [SOLR-12298|https://issues.apache.org/jira/browse/SOLR-12298], there ought to 
> be an URP to add metadata fields to childDocuments in order to allow a 
> transformer to rebuild the original document hierarchy.
> {quote}I propose we add the following fields:
>  # __nestParent__
>  # _nestLevel_
>  # __nestPath__
> __nestParent__: This field wild will store the document's parent docId, to be 
> used for building the whole hierarchy, using a new document transformer, as 
> suggested by Jan on the mailing list.
> _nestLevel_: This field will store the level of the specified field in the 
> document, using an int value. This field can be used for the parentFilter, 
> eliminating the need to provide a parentFilter, which will be set by default 
> as "_level_:queriedFieldLevel".
> _nestLevel_: This field will contain the full path, separated by a specific 
> reserved char e.g., '.'
>  for example: "first.second.third".
>  This will enable users to search for a specific path, or provide a regular 
> expression to search for fields sharing the same name in different levels of 
> the document, filtering using the level key if needed.
> {quote}



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