How to get list of all field names in ElasticSearch? - elasticsearch

Question

I've been trying to get all the field names in my ElasticSearch database dynamically so I can input them into a GUI drop down search box.
{
"odd": ["three", "five", "nine"],
"even": ["two", "four", "six"],
"prime": ["seven", "thirteen", "seventeen"]
}
Is there a way to obtain the field names : odd, even and prime
Such that I can enter them into a Jcombobox in the user interface?

Answer 1

In jquery...
//...Get data
var hits = body.hits.hits;
$.each(hits, function(index, value){
var sources = hits[index]._source;
$.each(sources, function(i, j){//i is the name of the field and j is the value
//Use data
});
});

Answer 2

GetMappingsResponse res = null; //Get entire mapping of elasticsearch
try {
res = client.admin().indices().getMappings(new GetMappingsRequest().indices("foo").types("bar")).get();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
ImmutableOpenMap<String, MappingMetaData> mapping = res.mappings().get("foo");
String[] FieldNames = new String[20];
String[] FieldNameArray;
for (ObjectObjectCursor<String, MappingMetaData> c : mapping) {
FieldNames[0] = c.value.source().toString(); //grabs and stores the mapping
}
String dirtyField = FieldNames[0];
List<String> badWords = Arrays.asList( "foo"); //here i parse the entire mapping to just obtain the field names
for ( String badWord : badWords ) { //filters the mapping so we can capture only the added metadata
dirtyField = dirtyField.replaceAll("" + badWord + "", "");
}
String cleanField = dirtyField.replaceAll("[^\\w\\s]"," ");
FieldNameArray = cleanField.split("\\s+"); //splits the string into an array of individual words
System.out.println("Updated Field Name Array");
return FieldNameArray;
It's pretty ugly, but this is how i ended up resolving the issue and grabbing just the field names.