ElasticSearch 5.x context suggester with multiple contexts - elasticsearch

Question

I want to use the context suggester from elasticSearch, but my suggestion results need to match 2 context values.
Expanding the example from the docs, i want to do something like:
POST place/_search?pretty
{
"suggest": {
"place_suggestion" : {
"prefix" : "tim",
"completion" : {
"field" : "suggest",
"size": 10,
"contexts": {
"place_type": [ "cafe", "restaurants" ],
"rating": ["good"]
}
}
}
}
}
I would like to have results that have a context 'cafe' or 'restaurant' for place_type AND that have the context 'good' for rating.
When I try something like this, elastic performs an OR operation on the contexts, giving me all suggestions with the context 'cafe', restaurant' OR 'good'.
Can I somehow specify what BOOL operator elastic needs to use for combining multiple contexts?

Answer 1

It looks like this functionality isn't supported from Elasticsearch 5.x onwards:
https://github.com/elastic/elasticsearch/issues/21291#issuecomment-375690371
Your best bet is to create a composite context, which seems to be how Elasticsearch 2.x achieved multiple contexts in a query:
https://github.com/elastic/elasticsearch/pull/26407#issuecomment-326771608
To do this, I guess you'll need a new field in your mapping. Let's call it cat-rating:
PUT place
{
"mappings": {
"properties": {
"suggest": {
"type": "completion",
"contexts": [
{
"name": "place_type-rating",
"type": "category",
"path": "cat-rating"
}
]
}
}
}
}
When you index new documents you'll need to concantenate the fields place_type and rating together, separated by -, for the cat-rating field.
Once that's done your query will need to look something like this:
POST place/_search?pretty
{
"suggest": {
"place_suggestion": {
"prefix": "tim",
"completion": {
"field": "suggest",
"size": 10,
"contexts": {
"place_type-rating": [
{
"context": "cafe-good"
},
{
"context": "restaurant-good"
}
]
}
}
}
}
}
That'll return suggestions of good cafe's OR good restaurants.