aggregation - ElasticSearch multifield not working -

in documents have field collaboration on aggregation queries. want full-text searchable, figured out should make multifield. field may this:

... "collaboration" : "cms" or "collaboration" : ["atlas", "cms"] or "collaboration" : "lhcb" ... 

following advice: elasticsearch term aggregation changed mapping to:

"collaboration": {     "type": "string",     "fields": {         "raw": {             "type": "string",             "index": "not_analyzed"         }     } }, 

and run query:

post /my_index/_search {    "aggs": {         "collaboration": {             "terms": {                 "field": "collaboration.raw"             }         }     } } 

and nothing:

"hits": {    "total": 5,    "max_score": 1,    "hits": [...] }, "aggregations": {    "collaboration": {       "doc_count_error_upper_bound": 0,       "sum_other_doc_count": 0,       "buckets": []    } } 

even when try use field searching doesn't work:

post /my_index/_search {     "query": {         "query_string": {             "query": "cms",             "fields": ["collaboration.raw"]         }     } } 

should change mapping somehow because of fact field list , string? research found arrays supposed supported out of box. suggestions might wrong here?

solved andrei stefan!

all documents needed reindexed after changing mapping, small yet painful detail.