yuanyun.cn created SOLR-5701:
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Summary: Allow DocTransformer to add arbitrary fields
Key: SOLR-5701
URL: https://issues.apache.org/jira/browse/SOLR-5701
Project: Solr
Issue Type: Bug
Components: search
Reporter: yuanyun.cn
Fix For: 5.0, 4.7
DocTransformer is very powerful, and allow us to add/remove or update fields
before returning.
One limit we don't like is that it can only add one field, and the field name
must be [transformer_name].
We may want to add multiple fields in one DocTransformer.
One possible solution is to add method getFieldNames into DocTransformer.
public abstract class DocTransformer{
public void List<String> getFieldNames() { return null; }
}
Then in SolrReturnFields.add(String, NamedList<String>, DocTransformers,
SolrQueryRequest)
Change augmenters.addTransformer( factory.create(disp, augmenterParams, req) );
like below:
DocTransformer docTransfomer = factory.create(disp, augmenterParams, req);
SolrReturnFields.add(docTransfomer);
then read fi3eldnames: docTransfomer.getFieldNames(); add them into
SolrReturnFields.
DocTransfomer implementation would add all fields via doc.addField.
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