# Drop filter

**URL:** <https://discuss.elastic.co/t/drop-filter/29951>\
**Category:** Logstash\
**Created:** [September 25, 2015, 12:10am UTC](https://discuss.elastic.co/t/drop-filter/29951 "2015-09-25T00:10:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![treehouse](https://avatars.discourse-cdn.com/v4/letter/t/e9a140/32.png) [@treehouse](https://discuss.elastic.co/u/treehouse)\
**Post date:** [September 25, 2015, 12:10am UTC](https://discuss.elastic.co/t/drop-filter/29951/1 "2015-09-25T00:10:30Z")

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Newbie question here: but why would the drop filter have all of these settings like

> add\_field, add\_tag, etc  
> if all it does is drop this particular event? I must be missing something here. thanks

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**Author:** ![Joshua\_Rich](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/joshua_rich/32/44953_2.png) [@Joshua\_Rich](https://discuss.elastic.co/u/Joshua_Rich)\
**Post date:** [September 25, 2015, 12:20am UTC](https://discuss.elastic.co/t/drop-filter/29951/2 "2015-09-25T00:20:54Z")

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Those options are all part of the base functionality of any filter plugin. All plugins inherit those options but obviously for the drop filter, it doesn't make sense. Also, the documentation is largely auto-generated, so these options are just added automatically to the docs.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 5:28am UTC](https://discuss.elastic.co/t/drop-filter/29951/3 "2017-07-06T05:28:04Z")

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Closed on July 6, 2017, 5:28am UTC