Elasticsearch: transform date with groovy script -

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i have following (simplified) mapping:

{   "event_date": {     "_source": { "enabled": true },     "_all": { "enabled": true },     "dynamic": "strict",     "properties": {       "start_date_time": {         "type": "date",         "format": "dateoptionaltime"       },       "start_date_day": {         "type": "date",         "format": "dateoptionaltime",         "index": "not_analyzed"       }     }   } }

the indexed objects this:

{   "start_date_time": "2017-05-08t18:23:45+0200" }

the property start_date_day should contain same date, time set 00:00:00. in example above start_date_day must "2017-05-08t00:00:00+0200".

i think,it possible achieve transform mapping , groovy script, developed groovy code did not work in elasticsearch-context , not familiar groovy language.

maybe has idea on how solve this?

yes doable, testing/running might need turn on script.groovy.sandbox.enabled: true in ../conf/elasticsearch.yml first.

put datetest/ {     "mappings": {         "event_date": {             "_source": { "enabled": true },             "_all": { "enabled": true },             "dynamic": "strict",             "transform" : {                 "script" : "ctx._source['start_date_day'] = new date().parse(\"yyyy-mm-dd\", ctx._source['start_date_time']).format(\"yyyy-mm-dd\");",                 "lang": "groovy"             },             "properties": {                 "start_date_time": {                     "type": "date",                     "format": "dateoptionaltime"                 },                 "start_date_day": {                     "type": "date",                     "format": "dateoptionaltime",                     "index": "not_analyzed",                     "store": "yes"                 }             }         }     } }

sample data:

put /datetest/event_date/1 {   "start_date_time": "2017-05-08t18:23:45+0200" }

sample output:

get /datetest/event_date/_search {   "query": {     "match_all": {}   },   "fields": ["start_date_time","start_date_day"] }  {    "took": 2,    "timed_out": false,    "_shards": {       "total": 5,       "successful": 5,       "failed": 0    },    "hits": {       "total": 1,       "max_score": 1,       "hits": [          {             "_index": "datetest",             "_type": "event_date",             "_id": "1",             "_score": 1,             "fields": {                "start_date_day": [                   "2017-05-08t00:00:00.000z"                ],                "start_date_time": [                   "2017-05-08t18:23:45+0200"                ]             }          }       ]    } }

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