Mapping definition for [suggest] has unsupported parameters: [payloads : true] - json

Question

I am using an example right from ElasticSearch documentation here using the Completion Suggestor but I am getting an error saying payloads: true is an unsupported parameter. Which obviously is supported unless the docs are wrong? I have the latest Elasticsearch app install (5.3.0).
Here is my cURL:
curl -X PUT localhost:9200/search/pages/_mapping -d '{
"pages" : {
"properties": {
"title": {
"type" : "string"
},
"suggest" : {
"type" : "completion",
"analyzer" : "simple",
"search_analyzer" : "simple",
"payloads" : true
}
}
}
}';
And the error:
{
"error" : {
"root_cause" : [
{
"type" : "mapper_parsing_exception",
"reason" : "Mapping definition for [suggest] has unsupported parameters: [payloads : true]"
}
],
"type" : "mapper_parsing_exception",
"reason" : "Mapping definition for [suggest] has unsupported parameters: [payloads : true]"
},
"status" : 400
}

Answer 1

The payloadparameter has been removed in ElasticSearch 5.3.0 by the following commit: Remove payload option from completion suggester . Here is the comit message:
The payload option was introduced with the new completion
suggester implementation in v5, as a stop gap solution
to return additional metadata with suggestions.
Now we can return associated documents with suggestions
(#19536) through fetch phase using stored field (_source).
The additional fetch phase ensures that we only fetch
the _source for the global top-N suggestions instead of
fetching _source of top results for each shard.