How to make elastic search only match full field - search

Question

I have a query looking like this:
((company_id:1) AND (candidate_tags:"designer"))
However this also matches users where candidate_tags is interaction designer. How do I exclude these?
Here's my full search body:
{
"query": {
"filtered": {
"query": {
"query_string": {
"query":
"((company_id:1) AND (candidate_tags:\"designer\"))"
}
}
}
}
"sort":{
"candidate_rating":{
"order":"desc"
},
"candidate_tags",
"_score"
}
}
Extra info
Realised now that an answer came in: candidate_tags is an array of strings, and say, a candidate has the tags interaction designer and talent, searching for talent should be a match but designer should not.

Answer 1

Make your candidate_tags field as not_analyzed or analyzed with keyword analyzer.
{
"mappings": {
"test": {
"properties": {
"candidate_tags": {
"type": "string",
"index": "not_analyzed"
}
}
}
}
}
or add a raw field to your existent mapping like this:
{
"mappings": {
"test": {
"properties": {
"candidate_tags": {
"type": "string",
"fields": {
"raw": {
"type": "string",
"index": "not_analyzed"
}
}
}
}
}
}
}
For the first option use the same query as you use now.
For the second option use candidate_tags.raw, like this:
{
"query": {
"filtered": {
"query": {
"query_string": {
"query": "((company_id:1) AND (candidate_tags.raw:\"designer\"))"
}
}
}
}
...

Answer 2

Another way is to use script:
POST test/t/1
{
"q":"a b"
}
POST test/t/2
{
"q":"a c"
}
POST test/t/_search
{
"query": {
"filtered": {
"filter": {
"script": {
"script": "return _source.q=='a b'"
}
}
}
}
}

Answer 3

By filtering.
By making field candidate_tags an exact-value field - aka not_analyzed field (Andrei Stefan's solution, answered above)
With #2 be careful that you don't later mix the field that is not_analyzed with those that are. More: https://www.elastic.co/guide/en/elasticsearch/guide/current/_exact_value_fields.html
With #1, your query would look something like that (written from memory, don't have ES on me so can't verify):
{
"query": {
"filtered": {
"query": {
"query_string": {
"query":
"((company_id:1) AND (candidate_tags:\"designer\"))"
}
},
"filter" : {
"term" : {
"candidate_tags" : "designer"
}
}
}
}
"sort":{
"candidate_rating":{
"order":"desc"
},
"candidate_tags",
"_score"
}
}