# Replace string in array with \_update\_by\_query

**URL:** <https://discuss.elastic.co/t/replace-string-in-array-with-update-by-query/239913>\
**Category:** Elasticsearch\
**Created:** [July 5, 2020, 8:18am UTC](https://discuss.elastic.co/t/replace-string-in-array-with-update-by-query/239913 "2020-07-05T08:18:02Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ovinz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ovinz/32/59207_2.png) [@ovinz](https://discuss.elastic.co/u/ovinz)\
**Post date:** [July 5, 2020, 8:18am UTC](https://discuss.elastic.co/t/replace-string-in-array-with-update-by-query/239913/1 "2020-07-05T08:18:02Z")

</div>

Hello,

I'd like to replace string by another one in all Array elements but I don't know how to do that in Java.

My document is like :

```auto
 "pictures" : [
            "https://www.mydomain.com/images/123.png",
            "https://www.mydomain.com/images/456.png",
            "https://www.mydomain.com/images/789.png"
          ],

```

And I'd like to have:

```auto
    "pictures" : [
            "https://pictures.mydomain.com/123.png",
            "https://pictures.mydomain.com/456.png",
            "https://pictures.mydomain.com/789.png"
          ],

```

I guess it's something like that but for an array List

```auto
    POST myindex/_update_by_query
{
  "script": {
        "lang": "painless",
        "inline": "ctx._source.pictures = ctx._source.pictures.replace('https://www.mydomain.com/images/', 'https://pictures.mydomain.com/')"
    },
    "query": {
        "exists": {
            "field": "pictures"
        }
    }
}

```

Thanks

---

<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:** [August 2, 2020, 8:19am UTC](https://discuss.elastic.co/t/replace-string-in-array-with-update-by-query/239913/2 "2020-08-02T08:19:04Z")

</div>

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