You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.1 KiB
82 lines
2.1 KiB
// 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
|
|
|
|
// NestedAggregation is a special single bucket aggregation that enables
|
|
// aggregating nested documents.
|
|
// See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/master/search-aggregations-bucket-nested-aggregation.html
|
|
type NestedAggregation struct {
|
|
path string
|
|
subAggregations map[string]Aggregation
|
|
meta map[string]interface{}
|
|
}
|
|
|
|
func NewNestedAggregation() *NestedAggregation {
|
|
return &NestedAggregation{
|
|
subAggregations: make(map[string]Aggregation),
|
|
}
|
|
}
|
|
|
|
func (a *NestedAggregation) SubAggregation(name string, subAggregation Aggregation) *NestedAggregation {
|
|
a.subAggregations[name] = subAggregation
|
|
return a
|
|
}
|
|
|
|
// Meta sets the meta data to be included in the aggregation response.
|
|
func (a *NestedAggregation) Meta(metaData map[string]interface{}) *NestedAggregation {
|
|
a.meta = metaData
|
|
return a
|
|
}
|
|
|
|
func (a *NestedAggregation) Path(path string) *NestedAggregation {
|
|
a.path = path
|
|
return a
|
|
}
|
|
|
|
func (a *NestedAggregation) Source() (interface{}, error) {
|
|
// Example:
|
|
// {
|
|
// "query" : {
|
|
// "match" : { "name" : "led tv" }
|
|
// }
|
|
// "aggs" : {
|
|
// "resellers" : {
|
|
// "nested" : {
|
|
// "path" : "resellers"
|
|
// },
|
|
// "aggs" : {
|
|
// "min_price" : { "min" : { "field" : "resellers.price" } }
|
|
// }
|
|
// }
|
|
// }
|
|
// }
|
|
// This method returns only the { "nested" : {} } part.
|
|
|
|
source := make(map[string]interface{})
|
|
opts := make(map[string]interface{})
|
|
source["nested"] = opts
|
|
|
|
opts["path"] = a.path
|
|
|
|
// AggregationBuilder (SubAggregations)
|
|
if len(a.subAggregations) > 0 {
|
|
aggsMap := make(map[string]interface{})
|
|
source["aggregations"] = aggsMap
|
|
for name, aggregate := range a.subAggregations {
|
|
src, err := aggregate.Source()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
aggsMap[name] = src
|
|
}
|
|
}
|
|
|
|
// Add Meta data if available
|
|
if len(a.meta) > 0 {
|
|
source["meta"] = a.meta
|
|
}
|
|
|
|
return source, nil
|
|
}
|
|
|