summaryrefslogtreecommitdiffstats
path: root/vendor/gopkg.in/olivere/elastic.v5/get.go
blob: efcc748bb56a7520669acccd3ed21b7dc66cbea1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
// 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

import (
	"context"
	"encoding/json"
	"fmt"
	"net/url"
	"strings"

	"github.com/olivere/elastic/uritemplates"
)

// GetService allows to get a typed JSON document from the index based
// on its id.
//
// See https://www.elastic.co/guide/en/elasticsearch/reference/6.0/docs-get.html
// for details.
type GetService struct {
	client                        *Client
	pretty                        bool
	index                         string
	typ                           string
	id                            string
	routing                       string
	preference                    string
	storedFields                  []string
	refresh                       string
	realtime                      *bool
	fsc                           *FetchSourceContext
	version                       interface{}
	versionType                   string
	parent                        string
	ignoreErrorsOnGeneratedFields *bool
}

// NewGetService creates a new GetService.
func NewGetService(client *Client) *GetService {
	return &GetService{
		client: client,
		typ:    "_all",
	}
}

// Index is the name of the index.
func (s *GetService) Index(index string) *GetService {
	s.index = index
	return s
}

// Type is the type of the document (use `_all` to fetch the first document
// matching the ID across all types).
func (s *GetService) Type(typ string) *GetService {
	s.typ = typ
	return s
}

// Id is the document ID.
func (s *GetService) Id(id string) *GetService {
	s.id = id
	return s
}

// Parent is the ID of the parent document.
func (s *GetService) Parent(parent string) *GetService {
	s.parent = parent
	return s
}

// Routing is the specific routing value.
func (s *GetService) Routing(routing string) *GetService {
	s.routing = routing
	return s
}

// Preference specifies the node or shard the operation should be performed on (default: random).
func (s *GetService) Preference(preference string) *GetService {
	s.preference = preference
	return s
}

// StoredFields is a list of fields to return in the response.
func (s *GetService) StoredFields(storedFields ...string) *GetService {
	s.storedFields = append(s.storedFields, storedFields...)
	return s
}

func (s *GetService) FetchSource(fetchSource bool) *GetService {
	if s.fsc == nil {
		s.fsc = NewFetchSourceContext(fetchSource)
	} else {
		s.fsc.SetFetchSource(fetchSource)
	}
	return s
}

func (s *GetService) FetchSourceContext(fetchSourceContext *FetchSourceContext) *GetService {
	s.fsc = fetchSourceContext
	return s
}

// Refresh the shard containing the document before performing the operation.
func (s *GetService) Refresh(refresh string) *GetService {
	s.refresh = refresh
	return s
}

// Realtime specifies whether to perform the operation in realtime or search mode.
func (s *GetService) Realtime(realtime bool) *GetService {
	s.realtime = &realtime
	return s
}

// VersionType is the specific version type.
func (s *GetService) VersionType(versionType string) *GetService {
	s.versionType = versionType
	return s
}

// Version is an explicit version number for concurrency control.
func (s *GetService) Version(version interface{}) *GetService {
	s.version = version
	return s
}

// IgnoreErrorsOnGeneratedFields indicates whether to ignore fields that
// are generated if the transaction log is accessed.
func (s *GetService) IgnoreErrorsOnGeneratedFields(ignore bool) *GetService {
	s.ignoreErrorsOnGeneratedFields = &ignore
	return s
}

// Pretty indicates that the JSON response be indented and human readable.
func (s *GetService) Pretty(pretty bool) *GetService {
	s.pretty = pretty
	return s
}

// Validate checks if the operation is valid.
func (s *GetService) Validate() error {
	var invalid []string
	if s.id == "" {
		invalid = append(invalid, "Id")
	}
	if s.index == "" {
		invalid = append(invalid, "Index")
	}
	if s.typ == "" {
		invalid = append(invalid, "Type")
	}
	if len(invalid) > 0 {
		return fmt.Errorf("missing required fields: %v", invalid)
	}
	return nil
}

// buildURL builds the URL for the operation.
func (s *GetService) buildURL() (string, url.Values, error) {
	// Build URL
	path, err := uritemplates.Expand("/{index}/{type}/{id}", map[string]string{
		"id":    s.id,
		"index": s.index,
		"type":  s.typ,
	})
	if err != nil {
		return "", url.Values{}, err
	}

	// Add query string parameters
	params := url.Values{}
	if s.pretty {
		params.Set("pretty", "true")
	}
	if s.routing != "" {
		params.Set("routing", s.routing)
	}
	if s.parent != "" {
		params.Set("parent", s.parent)
	}
	if s.preference != "" {
		params.Set("preference", s.preference)
	}
	if len(s.storedFields) > 0 {
		params.Set("stored_fields", strings.Join(s.storedFields, ","))
	}
	if s.refresh != "" {
		params.Set("refresh", s.refresh)
	}
	if s.version != nil {
		params.Set("version", fmt.Sprintf("%v", s.version))
	}
	if s.versionType != "" {
		params.Set("version_type", s.versionType)
	}
	if s.realtime != nil {
		params.Set("realtime", fmt.Sprintf("%v", *s.realtime))
	}
	if s.ignoreErrorsOnGeneratedFields != nil {
		params.Add("ignore_errors_on_generated_fields", fmt.Sprintf("%v", *s.ignoreErrorsOnGeneratedFields))
	}
	if s.fsc != nil {
		for k, values := range s.fsc.Query() {
			params.Add(k, strings.Join(values, ","))
		}
	}
	return path, params, nil
}

// Do executes the operation.
func (s *GetService) Do(ctx context.Context) (*GetResult, error) {
	// Check pre-conditions
	if err := s.Validate(); err != nil {
		return nil, err
	}

	// Get URL for request
	path, params, err := s.buildURL()
	if err != nil {
		return nil, err
	}

	// Get HTTP response
	res, err := s.client.PerformRequest(ctx, PerformRequestOptions{
		Method: "GET",
		Path:   path,
		Params: params,
	})
	if err != nil {
		return nil, err
	}

	// Return operation response
	ret := new(GetResult)
	if err := s.client.decoder.Decode(res.Body, ret); err != nil {
		return nil, err
	}
	return ret, nil
}

// -- Result of a get request.

// GetResult is the outcome of GetService.Do.
type GetResult struct {
	Index   string                 `json:"_index"`   // index meta field
	Type    string                 `json:"_type"`    // type meta field
	Id      string                 `json:"_id"`      // id meta field
	Uid     string                 `json:"_uid"`     // uid meta field (see MapperService.java for all meta fields)
	Routing string                 `json:"_routing"` // routing meta field
	Parent  string                 `json:"_parent"`  // parent meta field
	Version *int64                 `json:"_version"` // version number, when Version is set to true in SearchService
	Source  *json.RawMessage       `json:"_source,omitempty"`
	Found   bool                   `json:"found,omitempty"`
	Fields  map[string]interface{} `json:"fields,omitempty"`
	//Error     string                 `json:"error,omitempty"` // used only in MultiGet
	// TODO double-check that MultiGet now returns details error information
	Error *ErrorDetails `json:"error,omitempty"` // only used in MultiGet
}