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From Chris Hostetter <>
Subject Re: Adding information to Solr response in custom filter query code?
Date Mon, 16 May 2016 18:41:04 GMT

: Is there a way to add a flag (or name value pair to Json resonse) in result
: being returned from Solr based on some security handling which happens in
: custom post filter code?
: How about if in custom post filter code I added the information to request
: context and then in a custom response builder, use that information to build
: the response object? how to add this flag to the result?

You're on the right track.

Take a look at the CollapseQParser (which is used as a PostFilter) and the 
ExpandComponent (which modifies the results after QueryComponent has run).  

Another helpful example to look at might be the ElevatedMarkerFactory 
(which is a DocTransformer) and how it uses information put in the request 
context by the QueryElevationComponent.

Assuming you only need to add some psuedo-fields to the documents that are 
returned, what you'll want is probably to make your PostFilter add 
information to the request context similar to how CollapseQParser does, 
and then use that information in a custom DocTransformer.  If you need to 
make more complex modifications to the entire response (ie: not just the 
individual search result documents) you'll need a custom SearchCOmponent 
to modify the responses -- but you'll also have to take care of merging 
the results of your custom SearchCOmponent in distributed (cloud) based 


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