# Does not whiteliist\_names support \[field\]\[subfiled\] logstash?

**URL:** <https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430>\
**Category:** Logstash\
**Created:** [September 13, 2020, 6:34am UTC](https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430 "2020-09-13T06:34:28Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![unisuke](https://avatars.discourse-cdn.com/v4/letter/u/9d8465/32.png) [@unisuke](https://discuss.elastic.co/u/unisuke)\
**Post date:** [September 13, 2020, 6:34am UTC](https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430/1 "2020-09-13T06:34:28Z")

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Hi,

Does filter/whtielist\_names support [fiield][subfield]?

```auto
filter {
        prune {
                whitelist_names => ["[content][0]"]
        }
}

```

I'm tring above filter for below.

```auto
When no filter does, the result is below.

"content" => [
  [0] {
    "AList" => [
      [0] {
        "name" => "X",
      },
      [1] {
        "name" => "Y,
      }
    ],
    "BList" => [
      [0] {
        "name" => "X",
      },
      [1] {
        "name" => "Y",
      }
    ],
  },

  [1] {
    "AList" => [
      [0] {
        "name" => "X",
      },
      [1] {
        "name" => "Y,
      }
    ],
    "BList" => [
      [0] {
        "name" => "X",
      },
      [1] {
        "name" => "Y",
      }
    ],
  }
],

"allFetched" => false,
"result" => true,
"number" => 0
}

```

The result is {}. # no result.

---

<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:** [September 13, 2020, 2:20pm UTC](https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430/2 "2020-09-13T14:20:46Z")

</div>

> [@unisuke](#):
>
> Does filter/whtielist\_names support [fiield][subfield]?

No it does not. The documentation says

`This filter currently only support operations on top-level fields, i.e. whitelisting and blacklisting of subfields based on name or value does not work.`

---

<div class="post-metadata">

**Author:** ![unisuke](https://avatars.discourse-cdn.com/v4/letter/u/9d8465/32.png) [@unisuke](https://discuss.elastic.co/u/unisuke)\
**Post date:** [September 14, 2020, 2:13am UTC](https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430/3 "2020-09-14T02:13:10Z")

</div>

Hi Badger,

Thank you for your reply!  
I 'm sorry for the lack of confirmation.  
I understand. I am anticipating the new and improved logstash.

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<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:** [October 12, 2020, 2:13am UTC](https://discuss.elastic.co/t/does-not-whiteliist-names-support-field-subfiled-logstash/248430/4 "2020-10-12T02:13:10Z")

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