5dbf36f356
* Issue search support elasticsearch * Fix lint * Add indexer name on app.ini * add a warnning on SearchIssuesByKeyword * improve code
390 lines
10 KiB
Go
390 lines
10 KiB
Go
// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"strings"
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"github.com/olivere/elastic/v7/uritemplates"
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)
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// ExplainService computes a score explanation for a query and
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// a specific document.
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// See https://www.elastic.co/guide/en/elasticsearch/reference/7.0/search-explain.html.
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type ExplainService struct {
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client *Client
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pretty *bool // pretty format the returned JSON response
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human *bool // return human readable values for statistics
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errorTrace *bool // include the stack trace of returned errors
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filterPath []string // list of filters used to reduce the response
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headers http.Header // custom request-level HTTP headers
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id string
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index string
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typ string
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q string
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routing string
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lenient *bool
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analyzer string
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df string
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fields []string
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lowercaseExpandedTerms *bool
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xSourceInclude []string
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analyzeWildcard *bool
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parent string
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preference string
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xSource []string
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defaultOperator string
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xSourceExclude []string
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source string
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bodyJson interface{}
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bodyString string
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}
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// NewExplainService creates a new ExplainService.
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func NewExplainService(client *Client) *ExplainService {
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return &ExplainService{
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client: client,
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typ: "_doc",
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xSource: make([]string, 0),
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xSourceExclude: make([]string, 0),
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fields: make([]string, 0),
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xSourceInclude: make([]string, 0),
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}
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}
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// Pretty tells Elasticsearch whether to return a formatted JSON response.
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func (s *ExplainService) Pretty(pretty bool) *ExplainService {
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s.pretty = &pretty
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return s
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}
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// Human specifies whether human readable values should be returned in
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// the JSON response, e.g. "7.5mb".
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func (s *ExplainService) Human(human bool) *ExplainService {
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s.human = &human
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return s
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}
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// ErrorTrace specifies whether to include the stack trace of returned errors.
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func (s *ExplainService) ErrorTrace(errorTrace bool) *ExplainService {
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s.errorTrace = &errorTrace
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return s
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}
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// FilterPath specifies a list of filters used to reduce the response.
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func (s *ExplainService) FilterPath(filterPath ...string) *ExplainService {
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s.filterPath = filterPath
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return s
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}
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// Header adds a header to the request.
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func (s *ExplainService) Header(name string, value string) *ExplainService {
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if s.headers == nil {
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s.headers = http.Header{}
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}
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s.headers.Add(name, value)
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return s
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}
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// Headers specifies the headers of the request.
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func (s *ExplainService) Headers(headers http.Header) *ExplainService {
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s.headers = headers
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return s
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}
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// Id is the document ID.
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func (s *ExplainService) Id(id string) *ExplainService {
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s.id = id
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return s
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}
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// Index is the name of the index.
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func (s *ExplainService) Index(index string) *ExplainService {
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s.index = index
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return s
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}
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// Type is the type of the document.
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//
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// Deprecated: Types are in the process of being removed.
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func (s *ExplainService) Type(typ string) *ExplainService {
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s.typ = typ
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return s
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}
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// Source is the URL-encoded query definition (instead of using the request body).
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func (s *ExplainService) Source(source string) *ExplainService {
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s.source = source
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return s
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}
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// XSourceExclude is a list of fields to exclude from the returned _source field.
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func (s *ExplainService) XSourceExclude(xSourceExclude ...string) *ExplainService {
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s.xSourceExclude = append(s.xSourceExclude, xSourceExclude...)
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return s
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}
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// Lenient specifies whether format-based query failures
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// (such as providing text to a numeric field) should be ignored.
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func (s *ExplainService) Lenient(lenient bool) *ExplainService {
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s.lenient = &lenient
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return s
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}
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// Query in the Lucene query string syntax.
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func (s *ExplainService) Q(q string) *ExplainService {
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s.q = q
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return s
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}
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// Routing sets a specific routing value.
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func (s *ExplainService) Routing(routing string) *ExplainService {
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s.routing = routing
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return s
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}
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// AnalyzeWildcard specifies whether wildcards and prefix queries
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// in the query string query should be analyzed (default: false).
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func (s *ExplainService) AnalyzeWildcard(analyzeWildcard bool) *ExplainService {
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s.analyzeWildcard = &analyzeWildcard
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return s
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}
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// Analyzer is the analyzer for the query string query.
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func (s *ExplainService) Analyzer(analyzer string) *ExplainService {
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s.analyzer = analyzer
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return s
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}
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// Df is the default field for query string query (default: _all).
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func (s *ExplainService) Df(df string) *ExplainService {
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s.df = df
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return s
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}
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// Fields is a list of fields to return in the response.
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func (s *ExplainService) Fields(fields ...string) *ExplainService {
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s.fields = append(s.fields, fields...)
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return s
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}
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// LowercaseExpandedTerms specifies whether query terms should be lowercased.
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func (s *ExplainService) LowercaseExpandedTerms(lowercaseExpandedTerms bool) *ExplainService {
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s.lowercaseExpandedTerms = &lowercaseExpandedTerms
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return s
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}
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// XSourceInclude is a list of fields to extract and return from the _source field.
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func (s *ExplainService) XSourceInclude(xSourceInclude ...string) *ExplainService {
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s.xSourceInclude = append(s.xSourceInclude, xSourceInclude...)
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return s
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}
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// DefaultOperator is the default operator for query string query (AND or OR).
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func (s *ExplainService) DefaultOperator(defaultOperator string) *ExplainService {
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s.defaultOperator = defaultOperator
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return s
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}
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// Parent is the ID of the parent document.
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func (s *ExplainService) Parent(parent string) *ExplainService {
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s.parent = parent
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return s
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}
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// Preference specifies the node or shard the operation should be performed on (default: random).
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func (s *ExplainService) Preference(preference string) *ExplainService {
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s.preference = preference
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return s
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}
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// XSource is true or false to return the _source field or not, or a list of fields to return.
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func (s *ExplainService) XSource(xSource ...string) *ExplainService {
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s.xSource = append(s.xSource, xSource...)
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return s
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}
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// Query sets a query definition using the Query DSL.
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func (s *ExplainService) Query(query Query) *ExplainService {
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src, err := query.Source()
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if err != nil {
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// Do nothing in case of an error
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return s
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}
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body := make(map[string]interface{})
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body["query"] = src
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s.bodyJson = body
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return s
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}
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// BodyJson sets the query definition using the Query DSL.
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func (s *ExplainService) BodyJson(body interface{}) *ExplainService {
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s.bodyJson = body
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return s
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}
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// BodyString sets the query definition using the Query DSL as a string.
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func (s *ExplainService) BodyString(body string) *ExplainService {
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s.bodyString = body
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return s
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}
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// buildURL builds the URL for the operation.
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func (s *ExplainService) buildURL() (string, url.Values, error) {
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// Build URL
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var path string
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var err error
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if s.typ == "" || s.typ == "_doc" {
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path, err = uritemplates.Expand("/{index}/_explain/{id}", map[string]string{
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"id": s.id,
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"index": s.index,
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})
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} else {
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path, err = uritemplates.Expand("/{index}/{type}/{id}/_explain", map[string]string{
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"id": s.id,
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"index": s.index,
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"type": s.typ,
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})
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}
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if err != nil {
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return "", url.Values{}, err
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}
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// Add query string parameters
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params := url.Values{}
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if v := s.pretty; v != nil {
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params.Set("pretty", fmt.Sprint(*v))
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}
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if v := s.human; v != nil {
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params.Set("human", fmt.Sprint(*v))
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}
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if v := s.errorTrace; v != nil {
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params.Set("error_trace", fmt.Sprint(*v))
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}
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if len(s.filterPath) > 0 {
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params.Set("filter_path", strings.Join(s.filterPath, ","))
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}
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if len(s.xSource) > 0 {
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params.Set("_source", strings.Join(s.xSource, ","))
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}
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if s.defaultOperator != "" {
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params.Set("default_operator", s.defaultOperator)
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}
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if s.parent != "" {
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params.Set("parent", s.parent)
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}
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if s.preference != "" {
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params.Set("preference", s.preference)
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}
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if s.source != "" {
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params.Set("source", s.source)
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}
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if len(s.xSourceExclude) > 0 {
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params.Set("_source_excludes", strings.Join(s.xSourceExclude, ","))
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}
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if s.lenient != nil {
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params.Set("lenient", fmt.Sprintf("%v", *s.lenient))
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}
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if s.q != "" {
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params.Set("q", s.q)
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}
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if s.routing != "" {
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params.Set("routing", s.routing)
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}
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if len(s.fields) > 0 {
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params.Set("fields", strings.Join(s.fields, ","))
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}
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if s.lowercaseExpandedTerms != nil {
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params.Set("lowercase_expanded_terms", fmt.Sprintf("%v", *s.lowercaseExpandedTerms))
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}
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if len(s.xSourceInclude) > 0 {
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params.Set("_source_includes", strings.Join(s.xSourceInclude, ","))
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}
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if s.analyzeWildcard != nil {
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params.Set("analyze_wildcard", fmt.Sprintf("%v", *s.analyzeWildcard))
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}
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if s.analyzer != "" {
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params.Set("analyzer", s.analyzer)
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}
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if s.df != "" {
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params.Set("df", s.df)
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}
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return path, params, nil
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}
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// Validate checks if the operation is valid.
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func (s *ExplainService) Validate() error {
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var invalid []string
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if s.index == "" {
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invalid = append(invalid, "Index")
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}
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if s.typ == "" {
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invalid = append(invalid, "Type")
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}
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if s.id == "" {
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invalid = append(invalid, "Id")
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}
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if len(invalid) > 0 {
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return fmt.Errorf("missing required fields: %v", invalid)
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}
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return nil
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}
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// Do executes the operation.
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func (s *ExplainService) Do(ctx context.Context) (*ExplainResponse, error) {
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// Check pre-conditions
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if err := s.Validate(); err != nil {
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return nil, err
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}
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// Get URL for request
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path, params, err := s.buildURL()
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if err != nil {
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return nil, err
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}
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// Setup HTTP request body
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var body interface{}
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if s.bodyJson != nil {
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body = s.bodyJson
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} else {
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body = s.bodyString
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}
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// Get HTTP response
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res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
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Method: "GET",
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Path: path,
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Params: params,
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Body: body,
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Headers: s.headers,
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})
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if err != nil {
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return nil, err
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}
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// Return operation response
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ret := new(ExplainResponse)
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if err := s.client.decoder.Decode(res.Body, ret); err != nil {
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return nil, err
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}
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return ret, nil
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}
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// ExplainResponse is the response of ExplainService.Do.
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type ExplainResponse struct {
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Index string `json:"_index"`
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Type string `json:"_type"`
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Id string `json:"_id"`
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Matched bool `json:"matched"`
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Explanation map[string]interface{} `json:"explanation"`
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}
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