# Data viewer and List behaviour

**URL:** https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283
**Category:** Questions about Thunkable X
**Created:** [August 31, 2023, 11:32am UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283 "2023-08-31T11:32:07Z")
**Posts on this page:** 6
**Page:** 1

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### Author: ![mattpb](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mattpb](https://community.thunkable.com/u/mattpb)
#### Post date: [August 31, 2023, 11:32am UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/1 "2023-08-31T11:32:08Z")

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Hi all,

I have 2 list viewers that the user selects an item from and for List Viewer 2 it filters fine and displays the filters the results in the data viewer but for list viewer 1 it seems to filter the results as the list decreases however the whole data viewer disappears. If i select something from list viewer 2 first and then from list viewer 1 it works fine.

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### Author: ![mattpb](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mattpb](https://community.thunkable.com/u/mattpb)
#### Post date: [August 31, 2023, 12:06pm UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/2 "2023-08-31T12:06:14Z")

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![Thunk1](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/1/c/1c30a2197b086f49d3c5c622356c22ff18b6a7f2.png)  
 ![Thunk2](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/b/3bef15de0dce750661f80fd14dac95c44733e6ea.png)  
 ![Thunk3](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/5/b/5b026f9e6f07d20924a9fb6acc35f91ec39e18e4.png)

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### Author: ![domhnallohanlon](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/domhnallohanlon/32/29554_2.png) [@domhnallohanlon](https://community.thunkable.com/u/domhnallohanlon)
#### Post date: [August 31, 2023, 12:53pm UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/3 "2023-08-31T12:53:07Z")

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Are those lists stored locally or in Sheets/Airtable @mattpb?

Also, where are `filteredChoice` and `filteredChoice2` being set?

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### Author: ![mattpb](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mattpb](https://community.thunkable.com/u/mattpb)
#### Post date: [August 31, 2023, 4:30pm UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/4 "2023-08-31T16:30:36Z")

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Yes it is from an air table.

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### Author: ![domhnallohanlon](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/domhnallohanlon/32/29554_2.png) [@domhnallohanlon](https://community.thunkable.com/u/domhnallohanlon)
#### Post date: [August 31, 2023, 4:41pm UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/5 "2023-08-31T16:41:12Z")

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You should try using the row object block and also cache the list of row IDs to improve performance here - there are too many server calls here I think

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### Author: ![system](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/0/f/0f59f292712368bce16ff80133ae10de8a6f27e8.png) [@system](https://community.thunkable.com/u/system)
#### Post date: [November 29, 2023, 4:41pm UTC](https://community.thunkable.com/t/data-viewer-and-list-behaviour/2571283/6 "2023-11-29T16:41:39Z")

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