# Is it possible to disable auto adding new field?

**URL:** <https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900>\
**Category:** Elasticsearch\
**Created:** [March 1, 2017, 2:01am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900 "2017-03-01T02:01:15Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\
**Post date:** [March 1, 2017, 2:01am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/1 "2017-03-01T02:01:15Z")

</div>

I know we can disable auto index creation by setting action.auto\_create\_index. If I index a doc with an undefined field, the field will be auto added to the index.  
Is it possible disable it? That is, if document contains undefined field, indexing should fail.

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [March 1, 2017, 3:47am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/2 "2017-03-01T03:47:35Z")

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You probably want this

[https://www.elastic.co/guide/en/elasticsearch/reference/5.2/dynamic.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.2/dynamic.html)

---

<div class="post-metadata">

**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\
**Post date:** [March 1, 2017, 4:00am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/3 "2017-03-01T04:00:15Z")

</div>

seems not work.

```auto
PUT /myindex
{
  "settings" : {
    "number_of_shards" : 1,
    "number_of_replicas" : 2
  },
  "mappings" : {
    "docs" : {
      "dynamic": false,
      "properties" : {
        "Title" : {
          "type" : "text"
        }
      }
    }
  }
}

POST /myindex/docs/1
{
  "DocumentId": "1033",
  "Title": "hello"
}

GET /myindex/docs/1

```

I got following response:

```auto
{
  "_index": "myindex",
  "_type": "docs",
  "_id": "1",
  "_version": 1,
  "found": true,
  "_source": {
    "DocumentId": "1033",
    "Title": "hello"
  }
}

```

Do I miss something?

---

<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [March 1, 2017, 4:23am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/4 "2017-03-01T04:23:07Z")

</div>

Try strict

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<div class="post-metadata">

**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\
**Post date:** [March 1, 2017, 4:38am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/5 "2017-03-01T04:38:45Z")

</div>

strict works as expected.  
So is it bug that false does not work?

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<div class="post-metadata">

**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\
**Post date:** [March 1, 2017, 6:02am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/6 "2017-03-01T06:02:34Z")

</div>

No it's not. Get the mapping and you will see that it has not been updated.

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<div class="post-metadata">

**Author:** ![Youxu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/youxu/32/117375_2.png) [@Youxu](https://discuss.elastic.co/u/Youxu)\
**Post date:** [March 1, 2017, 6:29am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/7 "2017-03-01T06:29:28Z")

</div>

Got u. Although getting document can return the field, but mapping actually is not updated with the new field.  
That makes sense.

Thanks!

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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:** [March 29, 2017, 6:29am UTC](https://discuss.elastic.co/t/is-it-possible-to-disable-auto-adding-new-field/76900/8 "2017-03-29T06:29:39Z")

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