# Key with dot notation in rank features of ES v8.4.0

**URL:** <https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424>\
**Category:** Elasticsearch\
**Created:** [January 4, 2023, 6:47am UTC](https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424 "2023-01-04T06:47:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Chen\_Bright](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chen_bright/32/115518_2.png) [@Chen\_Bright](https://discuss.elastic.co/u/Chen_Bright)\
**Post date:** [January 4, 2023, 6:47am UTC](https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424/1 "2023-01-04T06:47:33Z")

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ENV: Elasticsearch v8.4.0  
operation steps(very simple):

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/f/9/f9979116722f40ab7a7762044663a805d15fc33d.png)

what i wanna know is, how can i insert this kind of data in the rank features field?(i tested in es v7.10.2, it works, so maybe es changed the way to treat the key field in the new version?)  
sry i am not so familiar with 'rank\_features', so if u have any ideas, can share with me? thx a lot!

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<div class="post-metadata">

**Author:** ![Chen\_Bright](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chen_bright/32/115518_2.png) [@Chen\_Bright](https://discuss.elastic.co/u/Chen_Bright)\
**Post date:** [January 4, 2023, 6:52am UTC](https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424/2 "2023-01-04T06:52:11Z")

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when i tested in es v7.10.2, it turned out to be:

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/a/d/ad598e8c38b12969f8aec2e60a1bd9450997582c.png)

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<div class="post-metadata">

**Author:** ![Chen\_Bright](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/chen_bright/32/115518_2.png) [@Chen\_Bright](https://discuss.elastic.co/u/Chen_Bright)\
**Post date:** [January 4, 2023, 11:42am UTC](https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424/3 "2023-01-04T11:42:36Z")

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Problem probably solved...  
adding '"subobjects": false'(which starts in es v8.3 and didn't mentioned in release notes) in mapping can disable object support in the entire index  
but it only works on 'rank\_features' not 'rank\_feature', that is weird...

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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:** [February 1, 2023, 11:43am UTC](https://discuss.elastic.co/t/key-with-dot-notation-in-rank-features-of-es-v8-4-0/322424/4 "2023-02-01T11:43:35Z")

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