Elasticsearch - Can't search using suggestion field (“is not a completion suggest field”) - elasticsearch

Question

I'm completely new to elasticsearch and I'm trying to use elasticsearch completion suggester on an existing field called "identity.full_name", index = "search" and type = "person".
I followed the below index to change the mappings of the field.
1)
POST /search/_close
2)
POST search/person/_mapping
{
"person": {
"properties": {
"identity.full_name": {
"type": "text",
"fields":{
"suggest":{
"type":"completion"
}
}
}
}
}
}
3)
POST /search/_open
When I check the mappings at this point, using
GET search/_mapping/person/field/identity.full_name
I get the result,
{
"search": {
"mappings": {
"person": {
"identity.full_name": {
"full_name": "identity.full_name",
"mapping": {
"full_name": {
"type": "text",
"fields": {
"completion": {
"type": "completion",
"analyzer": "simple",
"preserve_separators": true,
"preserve_position_increments": true,
"max_input_length": 50
},
"keyword": {
"type": "keyword",
"ignore_above": 256
},
"suggest": {
"type": "completion",
"analyzer": "simple",
"preserve_separators": true,
"preserve_position_increments": true,
"max_input_length": 50
}
}
}
}
}
}
}
}
}
Which is suggesting that it has been updated to be a completion field.
However, when I'm querying to check if this works using,
GET search/person/_search
{
"suggest": {
"person-suggest" : {
"prefix" : "EMANNUEL",
"completion" : {
"field" : "identity.full_name"
}
}
}
}
It is giving me the error "Field [identity.full_name] is not a completion suggest field"
I'm not sure why I'm getting this error. Is there anything else I can try?
sample data:
{
"_index": "search",
"_type": "person",
"_id": "3106105149",
"_score": 1,
"_source": {
"identity": {
"id": "3106105149",
"first_name": "FLORENT",
"last_name": "TEBOUL",
"full_name": "FLORENT TEBOUL"
}
}
}
{
"_index": "search",
"_type": "person",
"_id": "125296353",
"_score": 1,
"_source": {
"identity": {
"id": "125296353",
"first_name": "CHRISTINA",
"last_name": "BHAN",
"full_name": "CHRISTINA K BHAN"
}
}
}
so when I do a GET based on prefix "CHRISTINA"
GET search/person/_search
{
"suggest": {
"person-suggest" : {
"prefix" : "CHRISTINA",
"completion" : {
"field" : "identity.full_name.suggest"
}
}
}
}
I'm getting all the results like a match_all query.

Answer 1

You should use it like
GET search/person/_search
{
"suggest": {
"person-suggest" : {
"prefix" : "EMANNUEL",
"completion" : {
"field" : "identity.full_name.suggest"
}
}
}
}
Mapping for GET search/_mapping/person/field/identity.full_name
{
"search" : {
"mappings" : {
"person" : {
"identity.full_name" : {
"full_name" : "identity.full_name",
"mapping" : {
"full_name" : {
"type" : "text",
"fields" : {
"suggest" : {
"type" : "completion",
"analyzer" : "simple",
"preserve_separators" : true,
"preserve_position_increments" : true,
"max_input_length" : 50
}
}
}
}
}
}
}
}
}