How to implement auto-complete in elasticsearch

Question

I need to implement auto-complete feature in a field called "names" in my document. Here is the suggest query I am using for that:

{
"autoSuggest": {
"text": "word",
"completion": {
"field": "names"
}
}
}

Im getting the following error running this query:

{
"_shards":{
"total":5,
"successful":0,
"failed":5,
"failures":[
{
"index":"myindex",
"shard":0,
"reason":"BroadcastShardOperationFailedException[[names][0] ]; nested: ElasticsearchException[failed to execute suggest]; nested: ClassCastException[org.elasticsearch.index.mapper.core.StringFieldMapper cannot be cast to org.elasticsearch.index.mapper.core.CompletionFieldMapper]; "
}
....
]
}

What is the reason for this error? and what should i do to enable the auto-complete?

Vineeth Mohan · Accepted Answer · 2015-06-23 02:23:44Z

2

You need to define the suggester in the mapping first , only then it makes sense to call it out in the _suggest API. You can refer more on the subject here.

answered Jun 23, 2015 at 2:23

Vineeth Mohan

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