# I used PUT MAPPING API to update my fields in existing ES. Will i need to reindex the new fields? What should i do to reindex the docs ? Also what is the format of the json to be used in put mapping?

**URL:** <https://discuss.elastic.co/t/i-used-put-mapping-api-to-update-my-fields-in-existing-es-will-i-need-to-reindex-the-new-fields-what-should-i-do-to-reindex-the-docs-also-what-is-the-format-of-the-json-to-be-used-in-put-mapping/53358>\
**Category:** Elasticsearch\
**Created:** [June 20, 2016, 6:48pm UTC](https://discuss.elastic.co/t/i-used-put-mapping-api-to-update-my-fields-in-existing-es-will-i-need-to-reindex-the-new-fields-what-should-i-do-to-reindex-the-docs-also-what-is-the-format-of-the-json-to-be-used-in-put-mapping/53358 "2016-06-20T18:48:53Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ambikaks](https://avatars.discourse-cdn.com/v4/letter/a/71e660/32.png) [@ambikaks](https://discuss.elastic.co/u/ambikaks)\
**Post date:** [June 20, 2016, 6:48pm UTC](https://discuss.elastic.co/t/i-used-put-mapping-api-to-update-my-fields-in-existing-es-will-i-need-to-reindex-the-new-fields-what-should-i-do-to-reindex-the-docs-also-what-is-the-format-of-the-json-to-be-used-in-put-mapping/53358/1 "2016-06-20T18:48:53Z")

</div>

{  
"dynamic":"strict",  
"\_all":{  
"enabled":false  
},  
"properties":{  
"CountryName":{  
"type":"string",  
"analyzer":"case\_insensitive\_analyzer"  
}  
}}

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:42pm UTC](https://discuss.elastic.co/t/i-used-put-mapping-api-to-update-my-fields-in-existing-es-will-i-need-to-reindex-the-new-fields-what-should-i-do-to-reindex-the-docs-also-what-is-the-format-of-the-json-to-be-used-in-put-mapping/53358/2 "2017-07-05T22:42:06Z")

</div>