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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
// ExistsQuery is a query that only matches on documents that the field
// has a value in them.
//
// For more details, see:
// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/query-dsl-exists-query.html
type ExistsQuery struct {
name string
queryName string
}
// NewExistsQuery creates and initializes a new dis max query.
func NewExistsQuery(name string) *ExistsQuery {
return &ExistsQuery{
name: name,
}
}
// QueryName sets the query name for the filter that can be used
// when searching for matched queries per hit.
func (q *ExistsQuery) QueryName(queryName string) *ExistsQuery {
q.queryName = queryName
return q
}
// Source returns the JSON serializable content for this query.
func (q *ExistsQuery) Source() (interface{}, error) {
// {
// "exists" : {
// "field" : "user"
// }
// }
query := make(map[string]interface{})
params := make(map[string]interface{})
query["exists"] = params
params["field"] = q.name
if q.queryName != "" {
params["_name"] = q.queryName
}
return query, nil
}
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