# Upsert Document on the basis of datetime format
**URL:** https://discuss.elastic.co/t/upsert-document-on-the-basis-of-datetime-format/243864
**Category:** Elasticsearch
**Created:** [August 5, 2020, 12:22pm UTC](https://discuss.elastic.co/t/upsert-document-on-the-basis-of-datetime-format/243864 "2020-08-05T12:22:31Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@rishabh\_jain](https://discuss.elastic.co/u/rishabh_jain)
#### Post date: [August 5, 2020, 12:22pm UTC](https://discuss.elastic.co/t/upsert-document-on-the-basis-of-datetime-format/243864/1 "2020-08-05T12:22:31Z")
Hello,
If I wanted to update an existing document if it satisfies the condition. See an example below:
Index: test\_index
1. Add tweet and lastupdated fields to document 1 as below. Please note that the lastupdated field is of type date and has epoch value.
PUT test\_index
{
"tweet" : "tweet1",
"lastupdated" : "2019-04-04T12:01:42.834Z"
}
2. I want to update the document only if the updated\_at greater than the current existing.
how can i write this using script?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 2, 2020, 12:22pm UTC](https://discuss.elastic.co/t/upsert-document-on-the-basis-of-datetime-format/243864/2 "2020-09-02T12:22:35Z")
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