3a0263bb72
you can do a manual fuzzy term search using the FuzzyQuery struct or, more suitable for most users the MatchQuery now supports some fuzzy options. Here you can specify fuzziness and prefix_length, to turn the underlying term search into a fuzzy term search. This has the benefit that analysis is performed on your input, just like the analyzed field, prior to computing the fuzzy variants. closes #82
85 lines
2.1 KiB
Go
85 lines
2.1 KiB
Go
// Copyright (c) 2014 Couchbase, Inc.
|
|
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
|
|
// except in compliance with the License. You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
// Unless required by applicable law or agreed to in writing, software distributed under the
|
|
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
|
|
// either express or implied. See the License for the specific language governing permissions
|
|
// and limitations under the License.
|
|
|
|
package bleve
|
|
|
|
import (
|
|
"github.com/blevesearch/bleve/index"
|
|
"github.com/blevesearch/bleve/search"
|
|
"github.com/blevesearch/bleve/search/searchers"
|
|
)
|
|
|
|
type fuzzyQuery struct {
|
|
Term string `json:"term"`
|
|
PrefixVal int `json:"prefix_length"`
|
|
FuzzinessVal int `json:"fuzziness"`
|
|
FieldVal string `json:"field,omitempty"`
|
|
BoostVal float64 `json:"boost,omitempty"`
|
|
}
|
|
|
|
// NewPrefixQuery creates a new Query which finds
|
|
// documents containing terms that start with the
|
|
// specified prefix.
|
|
func NewFuzzyQuery(term string) *fuzzyQuery {
|
|
return &fuzzyQuery{
|
|
Term: term,
|
|
PrefixVal: 0,
|
|
FuzzinessVal: 1,
|
|
BoostVal: 1.0,
|
|
}
|
|
}
|
|
|
|
func (q *fuzzyQuery) Boost() float64 {
|
|
return q.BoostVal
|
|
}
|
|
|
|
func (q *fuzzyQuery) SetBoost(b float64) Query {
|
|
q.BoostVal = b
|
|
return q
|
|
}
|
|
|
|
func (q *fuzzyQuery) Field() string {
|
|
return q.FieldVal
|
|
}
|
|
|
|
func (q *fuzzyQuery) SetField(f string) Query {
|
|
q.FieldVal = f
|
|
return q
|
|
}
|
|
|
|
func (q *fuzzyQuery) Fuzziness() int {
|
|
return q.FuzzinessVal
|
|
}
|
|
|
|
func (q *fuzzyQuery) SetFuzziness(f int) Query {
|
|
q.FuzzinessVal = f
|
|
return q
|
|
}
|
|
|
|
func (q *fuzzyQuery) Prefix() int {
|
|
return q.PrefixVal
|
|
}
|
|
|
|
func (q *fuzzyQuery) SetPrefix(p int) Query {
|
|
q.PrefixVal = p
|
|
return q
|
|
}
|
|
|
|
func (q *fuzzyQuery) Searcher(i index.IndexReader, m *IndexMapping, explain bool) (search.Searcher, error) {
|
|
field := q.FieldVal
|
|
if q.FieldVal == "" {
|
|
field = m.DefaultField
|
|
}
|
|
return searchers.NewFuzzySearcher(i, q.Term, q.PrefixVal, q.FuzzinessVal, field, q.BoostVal, explain)
|
|
}
|
|
|
|
func (q *fuzzyQuery) Validate() error {
|
|
return nil
|
|
}
|