# Can Records or Fields read from Extensions?

**URL:** <https://air.tableforums.com/t/can-records-or-fields-read-from-extensions/557>\
**Category:** Custom Extensions\
**Created:** [April 27, 2023, 7:57pm UTC](https://air.tableforums.com/t/can-records-or-fields-read-from-extensions/557 "2023-04-27T19:57:34Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![bfrench](https://yyz1.discourse-cdn.com/flex029/user_avatar/air.tableforums.com/bfrench/32/46_2.png) [@bfrench](https://air.tableforums.com/u/bfrench)\
**Post date:** [May 1, 2023, 2:11pm UTC](https://air.tableforums.com/t/can-records-or-fields-read-from-extensions/557/5 "2023-05-01T14:11:27Z")

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> [@sleepyjoe](#):
>
> For instance, can a formula field refer to a formula baked into the extension?

> [@Kuovonne](#):
>
> While extensions can read and write fields and record data, the reverse is not true.

That is precisely why I have lobbied Airtable to make custom formulas through javascript possible. All I get is pushback from the community and Airtable for a capability that has existed in Google Sheets and Excel since most of you were in grade school.

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