Minimum should match context
editMinimum should match context
editUse a Painless script to specify the minimum number of terms that a specified field needs to match with for a document to be part of the query results.
Variables

params
(Map
, readonly)  Userdefined parameters passed in as part of the query.

params['num_terms']
(int
, readonly)  The number of terms specified to match with.

doc
(Map
, readonly) 
Contains the fields of the current document where each field is a
List
of values.
Return

int
 The minimum number of terms required to match the current document.
API
The standard Painless API is available.
Example
To run this example, first follow the steps in context examples.
Imagine that you want to find seats to performances by your favorite actors. You have a list of favorite actors in mind, and you want to find performances where the cast includes at least a certain number of them.
To achieve this result, use a terms_set
query with
minimum_should_match_script
. To make the query request more configurable,
you can define min_actors_to_see
as a script parameter.
To ensure that the parameter min_actors_to_see
doesn’t exceed
the number of favorite actors, you can use num_terms
to get
the number of actors in the list and Math.min
to get the lesser
of the two.
Math.min(params['num_terms'], params['min_actors_to_see'])
The following request finds seats to performances with at least two of the three specified actors.
GET seats/_search { "query": { "terms_set": { "actors": { "terms": [ "smith", "earns", "black" ], "minimum_should_match_script": { "source": "Math.min(params['num_terms'], params['min_actors_to_see'])", "params": { "min_actors_to_see": 2 } } } } } }