# Json nested field

**URL:** <https://discuss.elastic.co/t/json-nested-field/293925>\
**Category:** Logstash\
**Created:** [January 10, 2022, 5:49pm UTC](https://discuss.elastic.co/t/json-nested-field/293925 "2022-01-10T17:49:53Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![kvmuralidhar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kvmuralidhar/32/45160_2.png) [@kvmuralidhar](https://discuss.elastic.co/u/kvmuralidhar)\
**Post date:** [January 10, 2022, 5:49pm UTC](https://discuss.elastic.co/t/json-nested-field/293925/1 "2022-01-10T17:49:53Z")

</div>

Hi All,

I have a field with value as a json object as follows

```auto
messageParts="[{\"disposition\":\"inline\",\"sha256\":\"f3c958fe6406140b13360a42b3237477dc5bc525f3858f64cca45bf2d02fc771\",\"md5\":\"c87f14af3c845fc6d8b84b15cc48dac0\",\"filename\":\"text.txt\",\"sandboxStatus\":null,\"oContentType\":\"text/plain\",\"contentType\":\"text/plain\"},{\"disposition\":\"inline\",\"sha256\":\"0f2cb440c517252b31fb18f1f4309678091ff39e849b66410d33cea339c21919\",\"md5\":\"70465367bce554e77a6e43b514114737\",\"filename\":\"text.html\",\"sandboxStatus\":null,\"oContentType\":\"text/html\",\"contentType\":\"text/html\"}\]"

```

How can I transform as follows ?

```auto
messageParts.disposition: ["inline, "inline"]
messageParts.sha256: ["f3c958fe6406140b13360a42b3237477dc5bc525f3858f64cca45bf2d02fc771", "0f2cb440c517252b31fb18f1f4309678091ff39e849b66410d33cea339c21919"]

```

I have tried ruby script and the values do show up as "nil" and not the actual value.

Thanks  
Murali

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [January 10, 2022, 10:32pm UTC](https://discuss.elastic.co/t/json-nested-field/293925/2 "2022-01-10T22:32:48Z")

</div>

Not tested, but something like

```
ruby {
    code => '
        messageParts = event.get("messageParts")
        if messageParts.is_a? Array
            messageParts.disposition = []
            messageParts.sha256 = []
            messageParts.each { |h|
                messageParts.disposition << h["disposition"]
                messageParts.sha256 << h["sha256"]
            }
            event.set("messageParts.disposition", messageParts.disposition)
            event.set("messageParts.sha256", messageParts.sha256)
        end
    '
}
```

---

<div class="post-metadata">

**Author:** ![kvmuralidhar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kvmuralidhar/32/45160_2.png) [@kvmuralidhar](https://discuss.elastic.co/u/kvmuralidhar)\
**Post date:** [January 11, 2022, 3:02pm UTC](https://discuss.elastic.co/t/json-nested-field/293925/3 "2022-01-11T15:02:30Z")

</div>

Hi Badger,

Thanks, I will try out your solution as well. It turned out that the json was not well formatted, so I ended up replacing the extra "\" with "". Then I was able to use the json filter plugin to parse the field.

```auto
     ruby {
         code => '
            tmpMessageParts = event.get("messageParts")
            tmpMessageParts.gsub!("\\", "")
            event.set("messageParts", tmpMessageParts)
         '
      }

      json {
         source => "messageParts"
         target => "json_messageParts"
      }

```

Output from one doc (just for messageParts field)

```auto
           "messageParts" => [
        [0] {
                   "sha256" => "8417fa76090411452aff96bb93bbe07aeab0f001f871cefafe76b739ab06cda7",
                      "md5" => "61d390d413a915e7988713f84ec155b7",
            "sandboxStatus" => nil,
                 "filename" => "text.txt",
              "disposition" => "inline",
             "oContentType" => "text/plain",
              "contentType" => "text/plain"
        },
        [1] {
                   "sha256" => "aa05de5c520f2a5e1303ac38ca508014ff7114acc58115af55c94fb1e9eadc52",
                      "md5" => "4bf5d3c5addf581668a72afaeb53d727",
            "sandboxStatus" => nil,
                 "filename" => "text.html",
              "disposition" => "inline",
             "oContentType" => "text/html",
              "contentType" => "text/html"
        }

```

Thanks  
Murali

---

<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:** [February 8, 2022, 3:03pm UTC](https://discuss.elastic.co/t/json-nested-field/293925/4 "2022-02-08T15:03:22Z")

</div>

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