Elasticsearch search for a value across multiple fields - elasticsearch

Question

My purpose is to search for a value across multiple fields and return the count of these values ​​and the distinct value.
To do this I realized that I have to use the facets.
This is the database schema:
index:
analysis:
analyzer:
custom_search_analyzer:
type: custom
tokenizer: standard
filter : [standard, snowball, lowercase, asciifolding]
custom_index_analyzer:
type: custom
tokenizer: standard
filter : [standard, snowball, lowercase, asciifolding, custom_filter]
filter:
custom_filter:
type: edgeNGram
side: front
min_gram: 1
max_gram: 20
{
"structure": {
"properties": {
"name": {"type": "string", "search_analyzer": "custom_search_analyzer", "index_analyzer": "custom_index_analyzer"},
"locality": {"type": "string", "search_analyzer": "custom_search_analyzer", "index_analyzer": "custom_index_analyzer"},
"province": {"type": "string", "search_analyzer": "custom_search_analyzer", "index_analyzer": "custom_index_analyzer"},
"region": {"type": "string", "search_analyzer": "custom_search_analyzer", "index_analyzer": "custom_index_analyzer"}
}
}
}
and this is the query that I tried to use:
{
"query": {
"bool": {
"should": [
{
"match": {
"locality": "bolo"
}
},
{
"match": {
"region": "bolo"
}
},
{
"match": {
"name": "bolo"
}
}
]
}
},
"facets": {
"region": {
"query": {
"term": {
"region": "bolo"
}
}
},
"locality": {
"query": {
"term": {
"locality": "bolo"
}
}
},
"name": {
"query": {
"term": {
"name": "bolo"
}
}
}
}
}
Of all the tests I've done this is the query that is closest to my desired result, however, does not tell me the count of distinct field, I found it to count the total field.
For example, the above query returns the following result:
facets: {
region: {
_type: query
count: 0
}
locality: {
_type: query
count: 2
}
name: {
_type: query
count: 0
}
}
I would like to have a result like this (not so obviously written is correct, but does understand what I need):
facets: {
....
locality: {
_type: query
"terms": [
{"term": "Bologna", "count": 1},
{"term": "Bolognano", "count": 1}
]
}
How can I do?
I have already tried to use "terms" instead of "query" in the facets and put "index: not_analyzed" in the fields of research, but is only returned if I try the exact scope, not part of it!

Answer 1

This can be done using value count aggregation.
In value count aggregation , it provides you the number of unique terms.
While terms aggregation gives you the unique term and its document count.
I believe you are looking for the value count aggregation - http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-aggregations-metrics-valuecount-aggregation.html