ElasticSearch MultiField Search Query - node.js

Question

I have an endpoint that I am proxying into ElasticSearch API for a simple user search I am conducting.
/users?nickname=myUsername&email=myemail#gmail.com&name=John+Smith
Somet details about these parameters are the following
All parameters are optional
nickname can be searched as a full text search (i.e. 'myUser' would return 'myUsername')
email must be an exact match
name can be searched as full text search for each token (i.e. 'john' would return 'John Smith')
The ElasticSearch search call should treat the parameters collectively as AND'd.
Right now, I am not truly sure where to start as I am able to execute the query on each of the parameters alone, but not all together.
client.search({
index: 'users',
type: 'user',
body: {
"query": {
//NEED TO FILL THIS IN
}
}
}).then(function(resp){
//Do something with search results
});

Answer 1

First you need to create the mapping for this particular use case.
curl -X PUT "http://$hostname:9200/myindex/mytype/_mapping" -d '{
"mytype": {
"properties": {
"email": {
"type": "string",
"index": "not_analyzed"
},
"nickname": {
"type": "string"
},
"name": {
"type": "string"
}
}
}
}'
Here by making email as not_analyzed , you are making sure only the exact match works.
Once that is done , you need to make the query.
As we have multiple conditions , it would be a good idea to use bool query.
You can combine multiple queries and how to handle them using bool query
Query -
{
"query": {
"bool": {
"must": [
{
"match": {
"name": "qbox"
}
},
{
"prefix": {
"nickname": "qbo"
}
},
{
"match": {
"email": "me#qbox.io"
}
}
]
}
}
}
Using the prefix query , you are telling Elasticsearch that even if the token starts with qbo , qualify it as a match.
Also prefix query might not be very fast , in that case you can go for ngram analyzer - http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/analysis-ngram-tokenizer.html