1 files changed, 81 insertions, 0 deletions
diff --git a/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_missing.go b/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_missing.go
new file mode 100644
index 000000000..3ca3fd693
--- /dev/null
+++ b/vendor/gopkg.in/olivere/elastic.v5/search_aggs_bucket_missing.go
@@ -0,0 +1,81 @@
+// 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
+
+// MissingAggregation is a field data based single bucket aggregation,
+// that creates a bucket of all documents in the current document set context
+// that are missing a field value (effectively, missing a field or having
+// the configured NULL value set). This aggregator will often be used in
+// conjunction with other field data bucket aggregators (such as ranges)
+// to return information for all the documents that could not be placed
+// in any of the other buckets due to missing field data values.
+// See: https://www.elastic.co/guide/en/elasticsearch/reference/5.2/search-aggregations-bucket-missing-aggregation.html
+type MissingAggregation struct {
+	field           string
+	subAggregations map[string]Aggregation
+	meta            map[string]interface{}
+}
+
+func NewMissingAggregation() *MissingAggregation {
+	return &MissingAggregation{
+		subAggregations: make(map[string]Aggregation),
+	}
+}
+
+func (a *MissingAggregation) Field(field string) *MissingAggregation {
+	a.field = field
+	return a
+}
+
+func (a *MissingAggregation) SubAggregation(name string, subAggregation Aggregation) *MissingAggregation {
+	a.subAggregations[name] = subAggregation
+	return a
+}
+
+// Meta sets the meta data to be included in the aggregation response.
+func (a *MissingAggregation) Meta(metaData map[string]interface{}) *MissingAggregation {
+	a.meta = metaData
+	return a
+}
+
+func (a *MissingAggregation) Source() (interface{}, error) {
+	// Example:
+	//	{
+	//    "aggs" : {
+	//      "products_without_a_price" : {
+	//        "missing" : { "field" : "price" }
+	//      }
+	//    }
+	//	}
+	// This method returns only the { "missing" : { ... } } part.
+
+	source := make(map[string]interface{})
+	opts := make(map[string]interface{})
+	source["missing"] = opts
+
+	if a.field != "" {
+		opts["field"] = a.field
+	}
+
+	// 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
+}