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search_queries_query_string.go 10.85 KB
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Oliver Eilhard 提交于 2015-07-11 17:28 . wip: Elasticsearch 2.0
// 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
import (
"fmt"
)
// QueryStringQuery uses the query parser in order to parse its content.
//
// For more details, see
// https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html
type QueryStringQuery struct {
queryString string
defaultField string
defaultOperator string
analyzer string
quoteAnalyzer string
quoteFieldSuffix string
autoGeneratePhraseQueries *bool
allowLeadingWildcard *bool
lowercaseExpandedTerms *bool
enablePositionIncrements *bool
analyzeWildcard *bool
locale string
boost *float64
fuzziness string
fuzzyPrefixLength *int
fuzzyMaxExpansions *int
fuzzyRewrite string
phraseSlop *int
fields []string
fieldBoosts map[string]*float64
useDisMax *bool
tieBreaker *float64
rewrite string
minimumShouldMatch string
lenient *bool
queryName string
timeZone string
maxDeterminizedStates *int
}
// NewQueryStringQuery creates and initializes a new QueryStringQuery.
func NewQueryStringQuery(queryString string) *QueryStringQuery {
return &QueryStringQuery{
queryString: queryString,
fields: make([]string, 0),
fieldBoosts: make(map[string]*float64),
}
}
// DefaultField specifies the field to run against when no prefix field
// is specified. Only relevant when not explicitly adding fields the query
// string will run against.
func (q *QueryStringQuery) DefaultField(defaultField string) *QueryStringQuery {
q.defaultField = defaultField
return q
}
// Field adds a field to run the query string against.
func (q *QueryStringQuery) Field(field string) *QueryStringQuery {
q.fields = append(q.fields, field)
return q
}
// FieldWithBoost adds a field to run the query string against with a specific boost.
func (q *QueryStringQuery) FieldWithBoost(field string, boost float64) *QueryStringQuery {
q.fields = append(q.fields, field)
q.fieldBoosts[field] = &boost
return q
}
// UseDisMax specifies whether to combine queries using dis max or boolean
// query when more zhan one field is used with the query string. Defaults
// to dismax (true).
func (q *QueryStringQuery) UseDisMax(useDisMax bool) *QueryStringQuery {
q.useDisMax = &useDisMax
return q
}
// TieBreaker is used when more than one field is used with the query string,
// and combined queries are using dismax.
func (q *QueryStringQuery) TieBreaker(tieBreaker float64) *QueryStringQuery {
q.tieBreaker = &tieBreaker
return q
}
// DefaultOperator sets the boolean operator of the query parser used to
// parse the query string.
//
// In default mode (OR) terms without any modifiers
// are considered optional, e.g. "capital of Hungary" is equal to
// "capital OR of OR Hungary".
//
// In AND mode, terms are considered to be in conjunction. The above mentioned
// query is then parsed as "capital AND of AND Hungary".
func (q *QueryStringQuery) DefaultOperator(operator string) *QueryStringQuery {
q.defaultOperator = operator
return q
}
// Analyzer is an optional analyzer used to analyze the query string.
// Note, if a field has search analyzer defined for it, then it will be used
// automatically. Defaults to the smart search analyzer.
func (q *QueryStringQuery) Analyzer(analyzer string) *QueryStringQuery {
q.analyzer = analyzer
return q
}
// QuoteAnalyzer is an optional analyzer to be used to analyze the query string
// for phrase searches. Note, if a field has search analyzer defined for it,
// then it will be used automatically. Defaults to the smart search analyzer.
func (q *QueryStringQuery) QuoteAnalyzer(quoteAnalyzer string) *QueryStringQuery {
q.quoteAnalyzer = quoteAnalyzer
return q
}
// AutoGeneratePhraseQueries indicates whether or not phrase queries will
// be automatically generated when the analyzer returns more then one term
// from whitespace delimited text. Set to false if phrase queries should only
// be generated when surrounded by double quotes.
func (q *QueryStringQuery) AutoGeneratePhraseQueries(autoGeneratePhraseQueries bool) *QueryStringQuery {
q.autoGeneratePhraseQueries = &autoGeneratePhraseQueries
return q
}
// MaxDeterminizedState protects against too-difficult regular expression queries.
func (q *QueryStringQuery) MaxDeterminizedState(maxDeterminizedStates int) *QueryStringQuery {
q.maxDeterminizedStates = &maxDeterminizedStates
return q
}
// AllowLeadingWildcard specifies whether leading wildcards should be allowed
// or not (defaults to true).
func (q *QueryStringQuery) AllowLeadingWildcard(allowLeadingWildcard bool) *QueryStringQuery {
q.allowLeadingWildcard = &allowLeadingWildcard
return q
}
// LowercaseExpandedTerms indicates whether terms of wildcard, prefix, fuzzy
// and range queries are automatically lower-cased or not. Default is true.
func (q *QueryStringQuery) LowercaseExpandedTerms(lowercaseExpandedTerms bool) *QueryStringQuery {
q.lowercaseExpandedTerms = &lowercaseExpandedTerms
return q
}
// EnablePositionIncrements indicates whether to enable position increments
// in result query. Defaults to true.
//
// When set, result phrase and multi-phrase queries will be aware of position
// increments. Useful when e.g. a StopFilter increases the position increment
// of the token that follows an omitted token.
func (q *QueryStringQuery) EnablePositionIncrements(enablePositionIncrements bool) *QueryStringQuery {
q.enablePositionIncrements = &enablePositionIncrements
return q
}
// Fuzziness sets the edit distance for fuzzy queries. Default is "AUTO".
func (q *QueryStringQuery) Fuzziness(fuzziness string) *QueryStringQuery {
q.fuzziness = fuzziness
return q
}
// FuzzyPrefixLength sets the minimum prefix length for fuzzy queries.
// Default is 1.
func (q *QueryStringQuery) FuzzyPrefixLength(fuzzyPrefixLength int) *QueryStringQuery {
q.fuzzyPrefixLength = &fuzzyPrefixLength
return q
}
func (q *QueryStringQuery) FuzzyMaxExpansions(fuzzyMaxExpansions int) *QueryStringQuery {
q.fuzzyMaxExpansions = &fuzzyMaxExpansions
return q
}
func (q *QueryStringQuery) FuzzyRewrite(fuzzyRewrite string) *QueryStringQuery {
q.fuzzyRewrite = fuzzyRewrite
return q
}
// PhraseSlop sets the default slop for phrases. If zero, then exact matches
// are required. Default value is zero.
func (q *QueryStringQuery) PhraseSlop(phraseSlop int) *QueryStringQuery {
q.phraseSlop = &phraseSlop
return q
}
// AnalyzeWildcard indicates whether to enabled analysis on wildcard and prefix queries.
func (q *QueryStringQuery) AnalyzeWildcard(analyzeWildcard bool) *QueryStringQuery {
q.analyzeWildcard = &analyzeWildcard
return q
}
func (q *QueryStringQuery) Rewrite(rewrite string) *QueryStringQuery {
q.rewrite = rewrite
return q
}
func (q *QueryStringQuery) MinimumShouldMatch(minimumShouldMatch string) *QueryStringQuery {
q.minimumShouldMatch = minimumShouldMatch
return q
}
// Boost sets the boost for this query.
func (q *QueryStringQuery) Boost(boost float64) *QueryStringQuery {
q.boost = &boost
return q
}
// QuoteFieldSuffix is an optional field name suffix to automatically
// try and add to the field searched when using quoted text.
func (q *QueryStringQuery) QuoteFieldSuffix(quoteFieldSuffix string) *QueryStringQuery {
q.quoteFieldSuffix = quoteFieldSuffix
return q
}
// Lenient indicates whether the query string parser should be lenient
// when parsing field values. It defaults to the index setting and if not
// set, defaults to false.
func (q *QueryStringQuery) Lenient(lenient bool) *QueryStringQuery {
q.lenient = &lenient
return q
}
// QueryName sets the query name for the filter that can be used when
// searching for matched_filters per hit.
func (q *QueryStringQuery) QueryName(queryName string) *QueryStringQuery {
q.queryName = queryName
return q
}
func (q *QueryStringQuery) Locale(locale string) *QueryStringQuery {
q.locale = locale
return q
}
// TimeZone can be used to automatically adjust to/from fields using a
// timezone. Only used with date fields, of course.
func (q *QueryStringQuery) TimeZone(timeZone string) *QueryStringQuery {
q.timeZone = timeZone
return q
}
// Source returns JSON for the query.
func (q *QueryStringQuery) Source() (interface{}, error) {
source := make(map[string]interface{})
query := make(map[string]interface{})
source["query_string"] = query
query["query"] = q.queryString
if q.defaultField != "" {
query["default_field"] = q.defaultField
}
if len(q.fields) > 0 {
fields := make([]string, 0)
for _, field := range q.fields {
if boost, found := q.fieldBoosts[field]; found {
if boost != nil {
fields = append(fields, fmt.Sprintf("%s^%f", field, *boost))
} else {
fields = append(fields, field)
}
} else {
fields = append(fields, field)
}
}
query["fields"] = fields
}
if q.tieBreaker != nil {
query["tie_breaker"] = *q.tieBreaker
}
if q.useDisMax != nil {
query["use_dis_max"] = *q.useDisMax
}
if q.defaultOperator != "" {
query["default_operator"] = q.defaultOperator
}
if q.analyzer != "" {
query["analyzer"] = q.analyzer
}
if q.quoteAnalyzer != "" {
query["quote_analyzer"] = q.quoteAnalyzer
}
if q.autoGeneratePhraseQueries != nil {
query["auto_generate_phrase_queries"] = *q.autoGeneratePhraseQueries
}
if q.maxDeterminizedStates != nil {
query["max_determinized_states"] = *q.maxDeterminizedStates
}
if q.allowLeadingWildcard != nil {
query["allow_leading_wildcard"] = *q.allowLeadingWildcard
}
if q.lowercaseExpandedTerms != nil {
query["lowercase_expanded_terms"] = *q.lowercaseExpandedTerms
}
if q.enablePositionIncrements != nil {
query["enable_position_increments"] = *q.enablePositionIncrements
}
if q.fuzziness != "" {
query["fuzziness"] = q.fuzziness
}
if q.boost != nil {
query["boost"] = *q.boost
}
if q.fuzzyPrefixLength != nil {
query["fuzzy_prefix_length"] = *q.fuzzyPrefixLength
}
if q.fuzzyMaxExpansions != nil {
query["fuzzy_max_expansions"] = *q.fuzzyMaxExpansions
}
if q.fuzzyRewrite != "" {
query["fuzzy_rewrite"] = q.fuzzyRewrite
}
if q.phraseSlop != nil {
query["phrase_slop"] = *q.phraseSlop
}
if q.analyzeWildcard != nil {
query["analyze_wildcard"] = *q.analyzeWildcard
}
if q.rewrite != "" {
query["rewrite"] = q.rewrite
}
if q.minimumShouldMatch != "" {
query["minimum_should_match"] = q.minimumShouldMatch
}
if q.quoteFieldSuffix != "" {
query["quote_field_suffix"] = q.quoteFieldSuffix
}
if q.lenient != nil {
query["lenient"] = *q.lenient
}
if q.queryName != "" {
query["_name"] = q.queryName
}
if q.locale != "" {
query["locale"] = q.locale
}
if q.timeZone != "" {
query["time_zone"] = q.timeZone
}
return source, nil
}
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