How to concatenate a string on elastic search - elasticsearch

Question

How to concatenate a string on elastic search.
for eg: here dasboradList.views has appended to new fields.
{
"_index": "haysbisuitedev",
"_type": "dasboardconfig",
"_id": "35",
"_version": 3,
"found": true,
"_source": {
"userId": 35,
"defaultDashBoard": "testsgare",
"dasboradList": "[{\"Ids\":2,\"views\":[{\"name\":\"test\",\"defaultView\":true,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_23663\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":\"#6FAA87\",\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0},{\"name\":\"check\",\"defaultView\":false,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_54316\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":null,\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0}]}]"
}
},
{
"_index": "haysbisuitedev",
"_type": "dasboardconfig",
"_id": "30",
"_version": 3,
"found": true,
"_source": {
"userId": 35,
"defaultDashBoard": "testsgare",
"dasboradList": "[{\"Ids\":2,\"views\":[{\"name\":\"test\",\"defaultView\":true,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_23663\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":\"#6FAA87\",\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0},{\"name\":\"check\",\"defaultView\":false,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_54316\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":null,\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0}]}]"
}
}
Above code specifies Elastic search index.
we want to append new field in a dasboradList.dasboradList has string type.
Needed json structure is..
{
"_index": "haysbisuitedev",
"_type": "dasboardconfig",
"_id": "35",
"_version": 3,
"found": true,
"_source": {
"userId": 35,
"defaultDashBoard": "testsgare",
"dasboradList": "[{\"Ids\":2,\"views\":[{\"name\":\"test\",`\"id\":\"name+"_"+userId\",\"createdDate\":\"01-01-2016\",\"expirydays\":\"10\"`,\"defaultView\":true,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_23663\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":\"#6FAA87\",\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0},{\"name\":\"check\",\"defaultView\":false,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_54316\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":null,\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0}]}]"
}
},
{
"_index": "haysbisuitedev",
"_type": "dasboardconfig",
"_id": "30",
"_version": 3,
"found": true,
"_source": {
"userId": 35,
"defaultDashBoard": "testsgare",
"dasboradList": "[{\"Ids\":2,\"views\":[{\"name\":\"test\",`\"id\":\"name+"_"+userId\",\"createdDate\":\"01-01-2016\",\"expirydays\":\"10\"`,\"defaultView\":true,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_23663\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":\"#6FAA87\",\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0},{\"name\":\"check\",\"defaultView\":false,\"layout\":{\"templateType\":\"1\",\"backgroundColor\":\"#DBE3F5\",\"lets\":[{\"id\":\"let_54316\",\"type\":\"\",\"rowNo\":\"0\",\"columnNo\":\"0\",\"colspan\":\"1\",\"rowspan\":\"1\",\"title\":\"\",\"dashlet\":\"\",\"bgColor\":\"\",\"width\":\"32%\",\"height\":\"27%\",\"name\":null,\"catalogId\":\"0\",\"dashletId\":\"0\",\"param\":{\"misID\":null,\"name\":null,\"graphType\":null},\"widget\":{\"headline1\":\"\",\"headline2\":\"\",\"percentage\":\"0\",\"enableWidget\":false,\"hoverOnDashelt\":false,\"chartType\":\"\",\"head1Color\":\"\",\"head2Color\":\"\",\"percentageColor\":\"\"},\"clipHeadline\":false}],\"shared\":false},\"background\":null,\"share\":null,\"comments\":null,\"shareable\":false,\"userId\":0}]}]"
}
}

Answer 1

In addition to what #jhilden said , we can indeed update an specific field in a ES document. But you need to enable scripting first.
Directly from the documentation :
#Index a document
curl -XPUT localhost:9200/test/type1/1 -d '{
"counter" : 1,
"tags" : ["red"]
}'
#Increase the count using inline scripting
curl -XPOST 'localhost:9200/test/type1/1/_update' -d '{
"script" : {
"inline": "ctx._source.counter += count",
"params" : {
"count" : 4
}
}
}'
#Add a new field
curl -XPOST 'localhost:9200/test/type1/1/_update' -d '{
"script" : "ctx._source.name_of_new_field = \"value_of_new_field\""
}'
You can also update by query in case that you don't know the id of the document or if you want to do a bulk update.
POST /twitter/_update_by_query
{
"script": {
"inline": "ctx._source.likes++"
},
"query": {
"term": {
"user": "kimchy"
}
}
}
More details of both concepts:
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/docs-update.html
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/docs-update-by-query.html
More information about inline scripting :
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/modules-scripting.html

Answer 2

If I understand your problem correctly you want to UPDATE a record in ElasticSearch. There is no way in ES to do a partial update. What I mean is, there is no equivalent to this:
UPDATE tbl1
SET col1 = 'I am updating only 1 column'
WHERE id = 123
In ElasticSaerch we update a record by:
GET the record you are looking for
update the record
POST the FULL, updated, record back to ElasticSearch specifying the existing _id field.
This will overwrite the old record, something you can verify by looking at the _version property.