# Update api
**URL:** https://discuss.elastic.co/t/update-api/11561
**Category:** Elasticsearch
**Created:** [April 12, 2013, 9:41am UTC](https://discuss.elastic.co/t/update-api/11561 "2013-04-12T09:41:28Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@kuwar\_sahani\_2](https://discuss.elastic.co/u/kuwar_sahani_2)
#### Post date: [April 12, 2013, 9:41am UTC](https://discuss.elastic.co/t/update-api/11561/1 "2013-04-12T09:41:28Z")
I have this index
curl -XPUT "[http://10.118.192.145:9200/test/type1/1](http://10.118.192.145:9200/test/type1/1)" -d '{
"tags" : ["red","blue"]
}'
want to perform an update like which checks for a tag in the tags field.if
it exists, do nothing else add.
i'am using this query:
curl -XPOST "[http://10.118.192.145:9200/test/type1/1/\_update](http://10.118.192.145:9200/test/type1/1/_update)" -d '{
"script" : "ctx.\_source.tags.contains(tag) ? ctx.op = "none" :
ctx.\_source.tags += tag",
"params" : {
"tag" : "Orange"
}
}'
the version gets updated but the tag is not being inserted.
Any suggestions? is there an alternate to achieve this.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 2:41am UTC](https://discuss.elastic.co/t/update-api/11561/2 "2017-07-06T02:41:26Z")