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find.go
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/
find.go
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// 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 couchdb
import (
"context"
"encoding/json"
"fmt"
"net/http"
"path"
"github.com/go-kivik/couchdb/v4/chttp"
"github.com/go-kivik/kivik/v4/driver"
)
const (
pathIndex = "_index"
)
func (d *db) CreateIndex(ctx context.Context, ddoc, name string, index interface{}, opts map[string]interface{}) error {
reqPath := pathIndex
if part, ok := opts[OptionPartition].(string); ok {
delete(opts, OptionPartition)
reqPath = path.Join("_partition", part, reqPath)
}
indexObj, err := deJSONify(index)
if err != nil {
return err
}
parameters := struct {
Index interface{} `json:"index"`
Ddoc string `json:"ddoc,omitempty"`
Name string `json:"name,omitempty"`
}{
Index: indexObj,
Ddoc: ddoc,
Name: name,
}
options := &chttp.Options{
Body: chttp.EncodeBody(parameters),
}
_, err = d.Client.DoError(ctx, http.MethodPost, d.path(reqPath), options)
return err
}
func (d *db) GetIndexes(ctx context.Context, opts map[string]interface{}) ([]driver.Index, error) {
reqPath := pathIndex
if part, ok := opts[OptionPartition].(string); ok {
delete(opts, OptionPartition)
reqPath = path.Join("_partition", part, reqPath)
}
var result struct {
Indexes []driver.Index `json:"indexes"`
}
_, err := d.Client.DoJSON(ctx, http.MethodGet, d.path(reqPath), nil, &result)
return result.Indexes, err
}
func (d *db) DeleteIndex(ctx context.Context, ddoc, name string, opts map[string]interface{}) error {
if ddoc == "" {
return missingArg("ddoc")
}
if name == "" {
return missingArg("name")
}
reqPath := pathIndex
if part, ok := opts[OptionPartition].(string); ok {
delete(opts, OptionPartition)
reqPath = path.Join("_partition", part, reqPath)
}
path := fmt.Sprintf("%s/%s/json/%s", reqPath, ddoc, name)
_, err := d.Client.DoError(ctx, http.MethodDelete, d.path(path), nil)
return err
}
func (d *db) Find(ctx context.Context, query interface{}, opts map[string]interface{}) (driver.Rows, error) {
reqPath := "_find"
if part, ok := opts[OptionPartition].(string); ok {
delete(opts, OptionPartition)
reqPath = path.Join("_partition", part, reqPath)
}
options := &chttp.Options{
GetBody: chttp.BodyEncoder(query),
Header: http.Header{
chttp.HeaderIdempotencyKey: []string{},
},
}
resp, err := d.Client.DoReq(ctx, http.MethodPost, d.path(reqPath), options)
if err != nil {
return nil, err
}
if err = chttp.ResponseError(resp); err != nil {
return nil, err
}
return newFindRows(ctx, resp.Body), nil
}
type queryPlan struct {
DBName string `json:"dbname"`
Index map[string]interface{} `json:"index"`
Selector map[string]interface{} `json:"selector"`
Options map[string]interface{} `json:"opts"`
Limit int64 `json:"limit"`
Skip int64 `json:"skip"`
Fields fields `json:"fields"`
Range map[string]interface{} `json:"range"`
}
type fields []interface{}
func (f *fields) UnmarshalJSON(data []byte) error {
if string(data) == `"all_fields"` {
return nil
}
var i []interface{}
if err := json.Unmarshal(data, &i); err != nil {
return err
}
newFields := make([]interface{}, len(i))
copy(newFields, i)
*f = newFields
return nil
}
func (d *db) Explain(ctx context.Context, query interface{}, opts map[string]interface{}) (*driver.QueryPlan, error) {
reqPath := "_explain"
if part, ok := opts[OptionPartition].(string); ok {
delete(opts, OptionPartition)
reqPath = path.Join("_partition", part, reqPath)
}
options := &chttp.Options{
GetBody: chttp.BodyEncoder(query),
Header: http.Header{
chttp.HeaderIdempotencyKey: []string{},
},
}
var plan queryPlan
if _, err := d.Client.DoJSON(ctx, http.MethodPost, d.path(reqPath), options, &plan); err != nil {
return nil, err
}
return &driver.QueryPlan{
DBName: plan.DBName,
Index: plan.Index,
Selector: plan.Selector,
Options: plan.Options,
Limit: plan.Limit,
Skip: plan.Skip,
Fields: plan.Fields,
Range: plan.Range,
}, nil
}