Elasticsearch, term suggester returns - elasticsearch

Question

I can't make term suggester work.
Here are my setups.
'name_not_analyzed': {
'type': 'string',
"index": "not_analyzed"
},
'suggest': {
'type': 'completion',
'analyzer': "simple",
'search_analyzer': 'simple',
'payloads': 'yes'
}
And here are my requests.
** Term suggester doesn't work..
GET /reviewmeta_index/_suggest
{
"my" : {
"text" : "dd",
"term" : {
"field" : "name_not_analyzed"
}
}
}
** completion suggester works..
GET /reviewmeta_index/_suggest
{
"product_suggest":{
"text":"dd",
"completion": {
"field" : "suggest"
}
}
}
Documentation on how I should set up for term suggester to work is sparse..

Answer 1

Completion Suggester is for Autocomplete feature so query like
{
"name_suggest":{
"text":"d",
"completion": {
"field" : "suggest"
}
}
}
will give you something like
"options": [
{
"text": "donald",
"score": 8
},
{
"text": "david",
"score": 7
}
]
while term suggester is for spell checking and finding similar terms, so you need to query like
{
"my-suggestion": {
"text": "davi",
"term": {
"field": "name_not_analyzed",
"size" : 10
}
}
}
which will give you something like this
"options": [
{
"text": "dave",
"score": 0.8333333,
"freq": 11
},
{
"text": "david",
"score": 0.6666666,
"freq": 6
}
]
I use term suggester for "Did you mean" feature when user gets zero results. More options for term suggester to tweak.
EDIT 1: Added min_word_length option
since your text is of only 2 characters and because default value of max_edits is 2 and default value of min_word_length is 4, you are not getting any results.
You need to add min_word_length option to your query
GET /reviewmeta_index/_suggest
{
"my" : {
"text" : "dd",
"term" : {
"field" : "name_not_analyzed",
"min_word_length" : 2
}
}
}
The above query will give you suggestions like "do","did" but wont give you "DO","Did" as you have index : not_analyzed on the field.
Note: You can not increase max_edits to more than 2 which is default.
The algorithm used by ES to calculate edit distance.