mongodb golang insert unknown/unstructured json document into collection - This function takes a interface{} and returns a structured bson.Document

mongodb golang insert any json.go

import (
	"github.com/mongodb/mongo-go-driver/bson"
)
func formatDocument(evdata interface{}) *bson.Document {

	doc := bson.NewDocument()
	for k, v := range evdata.(map[string]interface{}) {
		switch t := v.(type) {
		case map[string]interface{}:
			doc.Append(bson.EC.SubDocument(k, formatDocument(t)))
		case []interface{}:
			arr := formatArray(v.([]interface{}))
			doc.Append(bson.EC.ArrayFromElements(k, arr...))
		default:
			doc.Append(bson.EC.Interface(k, t))
		}
	}

	return doc
}

func formatArray(v []interface{}) []*bson.Value {

	arr := make([]*bson.Value, len(v))

	for k2, v2 := range v {
		var val *bson.Value

		switch v2.(type) {
		case map[string]interface{}:
			val = bson.VC.Document(formatDocument(v2))
		case []interface{}:
			arr := v2.([]interface{})
			val = bson.VC.ArrayFromValues(formatArray(arr)...)
		default:
			val = bson.EC.Interface("", v2).Value()
		}

		arr[k2] = val
	}

	return arr
}