[jira] [Updated] (SOLR-7097) Update other Document in DocTransformer

["yuanyun.cn (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-7097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

yuanyun.cn updated SOLR-7097:
-----------------------------
    Summary: Update other Document in DocTransformer  (was: Able to update other Document in DocTransformer)

> Update other Document in DocTransformer
> ---------------------------------------
>
>                 Key: SOLR-7097
>                 URL: https://issues.apache.org/jira/browse/SOLR-7097
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: yuanyun.cn
>            Priority: Minor
>              Labels: searcher, transformers
>
> Solr DocTransformer is good, but it only allows us to change current document: add or remove, update fields.
> It would be great if we can update other document(previous especially)  .
> User case:
> We can use flat group mode(group.main=true) to put parent and child close to each other(parent first), then we can use DocTransformer to update parent document when access its child document.
> Some thought about Implementation:
> org.apache.solr.response.TextResponseWriter.writeDocuments(String, ResultContext, ReturnFields)
> when cachMode=true, in the for loop, after transform, we can store the solrdoc in a list, write these doc at the end.
> cachMode = req.getParams().getBool("cachMode", false);
> SolrDocument[] cachedDocs = new SolrDocument[sz];
> for (int i = 0; i < sz; i++) {
>  SolrDocument sdoc = toSolrDocument(doc);
>  if (transformer != null) {
>   transformer.transform(sdoc, id);
>  }
>  if(cachMode)
>  {
>     cachedDocs[i] = sdoc;
>  }
>  else{
>     writeSolrDocument( null, sdoc, returnFields, i );
>  }
>   
> }
> if (transformer != null) {
>  transformer.setContext(null);
> }
> if(cachMode) {
>  for (int i = 0; i < sz; i++) {
>   writeSolrDocument(null, cachedDocs[i], returnFields, i);
>  }
> }
> writeEndDocumentList();



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