Hi,
Your example response (<facetEntry count="20">) looks like customized. Your
SolrJ program also has Element class that I have never seen.
By the way, fq=-author:Dickens, Janet is parsed as -author:Dickens
defaultField:Janet
Assuming it is String type, either use quotes fq=-author:"Dickens, Janet" or
term query parser:
fq=-{!term f=author}Dickens, Janet
Ahmet
On Thursday, February 27, 2014 12:42 AM, idioma <corda.ila...@gmail.com> wrote:
I use a SolrJ-based client to query Solr and I have been trying to construct
HTTP requests where facet name/value pairs are excluded. The web interface I
am working with has a refine further functionality, which allows excluding
one or more facet values. I have 3 facet fields: domain, content type and
author and I would like to be able to handle faceting by exclusion on each
of them. For example, q = Dickens AND fq=-author:Dickens, Janet will
construct the following HTTP request:
/solr/solrbase/select?q=Dickens&fq=-author:Dickens%2c+Janet&wt=json&indent=true
Whereas the XML dump will look like:
<facets>
<facet name="author">
<facetEntry count="20">Dickens, Charles</facetEntry>
<facetEntry count="10">Dickens, Sarah</facetEntry>
</facet>
</facets>
So far, the Java implementation I am working with does not seems to handle
filter query exclusion:
private HttpSolrServer solrServer;
solrServer = new HttpSolrServer("http://localhost:8983/solr/";);
private static final String CONFIG_SOLR_FACET_FIELD = "facet_field";
private String[] _facetFields = new String[] {"author"};
private static final String CONFIG_SOLR_FACETS = "facets"
Element el = myParams.getChild(CONFIG_SOLR_FACETS);
_facetUse = el.getAttributeValue("useFacets", "true");
_facetMinCount = el.getAttributeValue("minCount",
String.valueOf(1));
_facetLimit = el.getAttributeValue("limit", String.valueOf(20));
List vals = el.getChildren(CONFIG_SOLR_FACET_FIELD);
if (vals.size() > 0) {
_facetFields = new String[vals.size()];
for (int i=0; i < vals.size(); i++) {
_facetFields[i] = ((Element)vals.get(i)).getTextTrim();
}
}
SolrQuery query = new SolrQuery();
query.setQuery(qs);
List facetList = doc.getRootElement().getChildren("facet");
Iterator<String> it = facetList.iterator();
while (it.hasNext()) {
Element el = (Element)it.next(); //
String name = el.getAttributeValue("name");
String value = el.getTextTrim();
if (name != null && value != null) {
facets.add(name+":"+value);
}
}
query.setQuery(qs).
setFacet(Boolean.parseBoolean(_facetUse)).
setFacetMinCount(Integer.parseInt(_facetMinCount)).
setFacetLimit(Integer.parseInt(_facetLimit)).
for (int i=0; i<_facetFields.length; i++) {
query.addFacetField(_facetFields[i]);
};
for (int i=0; i<facets.size(); i++) {
query.addFilterQuery(facets.get(i));
};
return query;
}
I was recommended to use something along these lines:
SolrQuery solrQuery = new SolrQuery();
solrQuery.set(CommonParams.FQ, “-author:Dickens,Janet”);
However, this seems to be a hardcoded approach and it cannot be easily
applied across all 3 facets and all facet values. I have looked at this, but
still it is not clear to me how I should include the exclusion variant in my
current code. Can you help with this?
Thanks indeed,
I.
--
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