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// Copyright 2012-2015 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
// FuzzyLikeThisQuery finds documents that are "like" provided text by
// running it against one or more fields.
// For more details, see
// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-flt-query.html
type FuzzyLikeThisQuery struct {
Query
fields []string
boost *float32
likeText *string
fuzziness interface{}
prefixLength *int
maxQueryTerms *int
ignoreTF *bool
analyzer string
failOnUnsupportedField *bool
queryName string
}
// NewFuzzyLikeThisQuery creates a new fuzzy query.
func NewFuzzyLikeThisQuery() FuzzyLikeThisQuery {
q := FuzzyLikeThisQuery{
fields: make([]string, 0),
}
return q
}
func (q FuzzyLikeThisQuery) Field(field string) FuzzyLikeThisQuery {
q.fields = append(q.fields, field)
return q
}
func (q FuzzyLikeThisQuery) Fields(fields ...string) FuzzyLikeThisQuery {
q.fields = append(q.fields, fields...)
return q
}
func (q FuzzyLikeThisQuery) LikeText(likeText string) FuzzyLikeThisQuery {
q.likeText = &likeText
return q
}
// Fuzziness can be an integer/long like 0, 1 or 2 as well as strings like "auto",
// "0..1", "1..4" or "0.0..1.0".
func (q FuzzyLikeThisQuery) Fuzziness(fuzziness interface{}) FuzzyLikeThisQuery {
q.fuzziness = fuzziness
return q
}
func (q FuzzyLikeThisQuery) PrefixLength(prefixLength int) FuzzyLikeThisQuery {
q.prefixLength = &prefixLength
return q
}
func (q FuzzyLikeThisQuery) MaxQueryTerms(maxQueryTerms int) FuzzyLikeThisQuery {
q.maxQueryTerms = &maxQueryTerms
return q
}
func (q FuzzyLikeThisQuery) IgnoreTF(ignoreTF bool) FuzzyLikeThisQuery {
q.ignoreTF = &ignoreTF
return q
}
func (q FuzzyLikeThisQuery) Analyzer(analyzer string) FuzzyLikeThisQuery {
q.analyzer = analyzer
return q
}
func (q FuzzyLikeThisQuery) Boost(boost float32) FuzzyLikeThisQuery {
q.boost = &boost
return q
}
func (q FuzzyLikeThisQuery) FailOnUnsupportedField(fail bool) FuzzyLikeThisQuery {
q.failOnUnsupportedField = &fail
return q
}
func (q FuzzyLikeThisQuery) QueryName(queryName string) FuzzyLikeThisQuery {
q.queryName = queryName
return q
}
// Creates the query source for the ids query.
func (q FuzzyLikeThisQuery) Source() interface{} {
// {
// "fuzzy_like_this" : {
// "fields" : ["name.first", "name.last"],
// "like_text" : "text like this one",
// "max_query_terms" : 12
// }
source := make(map[string]interface{})
query := make(map[string]interface{})
source["fuzzy_like_this"] = query
if len(q.fields) > 0 {
query["fields"] = q.fields
}
query["like_text"] = q.likeText
if q.maxQueryTerms != nil {
query["max_query_terms"] = *q.maxQueryTerms
}
if q.fuzziness != nil {
query["fuzziness"] = q.fuzziness
}
if q.prefixLength != nil {
query["prefix_length"] = *q.prefixLength
}
if q.ignoreTF != nil {
query["ignore_tf"] = *q.ignoreTF
}
if q.boost != nil {
query["boost"] = *q.boost
}
if q.analyzer != "" {
query["analyzer"] = q.analyzer
}
if q.failOnUnsupportedField != nil {
query["fail_on_unsupported_field"] = *q.failOnUnsupportedField
}
if q.queryName != "" {
query["_name"] = q.queryName
}
return source
}
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