# Filtering nested json outupt

**URL:** <https://discuss.elastic.co/t/filtering-nested-json-outupt/186765>\
**Category:** Logstash\
**Created:** [June 20, 2019, 8:51pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765 "2019-06-20T20:51:29Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![EZprogramming](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ezprogramming/32/57291_2.png) [@EZprogramming](https://discuss.elastic.co/u/EZprogramming)\
**Post date:** [June 20, 2019, 8:51pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/1 "2019-06-20T20:51:29Z")

</div>

**JSON output:**

`{"d":[{"id":960929,"created_at":"2019-06-19T00:27:28.107Z","belongs_to __application":{"__ deferred":{"uri":"/resin/application(1415733)"}," __id":1415733},"is_created_by__ user":{"__deferred":{"uri":"/resin/user(47100)"},"__id":47100},"commit":"9d6542006b3b9a3d61994e24f9d1c6dc","composition":{"version":"2.1","networks":{},"volumes":{"resin-data":{}},"services":{"ecoationROS":{"build":{"context":"./ROS/app/ecoation-oko-app"},"privileged":true,"restart":"always","network_mode":"host","volumes":["resin-data:/data"],"labels":{"io.balena.features.kernel-modules":"1","io.balena.features.firmware":"1","io.balena.features.dbus":"1","io.balena.features.supervisor-api":"1","io.balena.features.balena-api":"1","io.balena.update.strategy":"download-then-kill","io.balena.update.handover-timeout":""}}}},"status":"success","source":"local","start_timestamp":"2019-06-19T00:27:27.748Z","end_timestamp":"2019-06-19T00:31:24.815Z","update_timestamp":"2019-06-19T00:31:25.222Z","__metadata":{"uri":"/resin/release(960929)","type":""}},{"id":960899,"created_at":"2019-06-18T23:10:13.653Z","belongs_to__application":{"__deferred":{"uri":"/resin/application(1415733)"},"__id":1415733},"is_created_by __user":{"__ deferred":{"uri":"/resin/user(47100)"},"__id":47100},"commit":"dec59d2b05c5db9a7d4d90bfaab27e3b","composition":{"version":"2.1","networks":{},"volumes":{"resin-data":{}},"services":{"ecoationROS":{"build":{"context":"./ROS/app/ecoation-oko-app"},"privileged":true,"restart":"always","network_mode":"host","volumes":["resin-data:/data"],"labels":{"io.balena.features.kernel-modules":"1","io.balena.features.firmware":"1","io.balena.features.dbus":"1","io.balena.features.supervisor-api":"1","io.balena.features.balena-api":"1","io.balena.update.strategy":"download-then-kill","io.balena.update.handover-timeout":""}}}},"status":"success","source":"local","start_timestamp":"2019-06-18T23:10:13.280Z","end_timestamp":"2019-06-18T23:27:07.857Z","update_timestamp":"2019-06-18T23:27:08.157Z","__metadata":{"uri":"/resin/release(960899)","type":""}},{"id":954099,"created_at":"2019-06-12T18:22:53.281Z","belongs_to __application":{"__ deferred":{"uri":"/resin/application(1415733)"}," __id":1415733},"is_created_by__ user":{"__deferred":{"uri":"/resin/user(49299)"},"__id":49299},"commit":"2200c40d0972f4fe25bba661e7945112","composition":{"version":"2.1","networks":{},"volumes":{"resin-data":{}},"services":{"ecoationROS":{"build":{"context":"./ROS/app/ecoation-oko-app"},"privileged":true,"restart":"always","network_mode":"host","volumes":["resin-data:/data"],"labels":{"io.balena.features.kernel-modules":"1","io.balena.features.firmware":"1","io.balena.features.dbus":"1","io.balena.features.supervisor-api":"1","io.balena.features.balena-api":"1","io.balena.update.strategy":"download-then-kill","io.balena.update.handover-timeout":""}}}}}]}`

What I want:

```
[
{
   created_at: ...
   commit: ...
},
{
   created_at: ...
   commit: ...
},
{
   created_at: ...
   commit: ...
}
]

```

**How can I approach this highly nested json? Is there anyway to easily do this in ruby? maybe a code generator or something?**

---

<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:** [June 20, 2019, 9:26pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/2 "2019-06-20T21:26:30Z")

</div>

Do you just want the created\_at and commit fields?

---

<div class="post-metadata">

**Author:** ![EZprogramming](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ezprogramming/32/57291_2.png) [@EZprogramming](https://discuss.elastic.co/u/EZprogramming)\
**Post date:** [June 20, 2019, 9:30pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/3 "2019-06-20T21:30:55Z")

</div>

@Badger, Yes, that is exactly what I'm looking for.

Currently, I'm having problems with how to approach this very nested json.

---

<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:** [June 20, 2019, 9:31pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/4 "2019-06-20T21:31:38Z")

</div>

```
    ruby {
        code => '
            a = []
            event.get("d").each { |x|
                h = {}
                h["commit"] = x["commit"]
                h["created_at"] = x["created_at"]
                a << h
            }
            event.set("someField", a)
        '
    }

```

will get you

```
 "someField" => [
    [0] {
        "created_at" => "2019-06-19T00:27:28.107Z",
            "commit" => "9d6542006b3b9a3d61994e24f9d1c6dc"
    },
    [1] {
        "created_at" => "2019-06-18T23:10:13.653Z",
            "commit" => "dec59d2b05c5db9a7d4d90bfaab27e3b"
    },
    [2] {
        "created_at" => "2019-06-12T18:22:53.281Z",
            "commit" => "2200c40d0972f4fe25bba661e7945112"
    }
```

---

<div class="post-metadata">

**Author:** ![EZprogramming](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/ezprogramming/32/57291_2.png) [@EZprogramming](https://discuss.elastic.co/u/EZprogramming)\
**Post date:** [June 20, 2019, 9:44pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/5 "2019-06-20T21:44:53Z")

</div>

@Badger, works like magic! I wasn't sure about the filter syntax, but now I learned, thank you!

For other people' reference:

here is the completed code with printing: Don't forget to change the field names based on your JSON output.

```
  ruby {
    code => '
      a = []
      event.get("d").each { |x|
          h = {}
          h["commit"] = x["commit"]
          h["created_at"] = x["created_at"]
          a << h
      }
      event.set("value", a)
    '
  }

  # prints
  ruby{
    code => 'puts event.get("value")'
  }
```

---

<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 18, 2019, 9:44pm UTC](https://discuss.elastic.co/t/filtering-nested-json-outupt/186765/6 "2019-07-18T21:44:56Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.