# Are "received selection" external expressions supported in logic block builder for HD structures?

**URL:** <https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122>\
**Category:** Nextworld Platform\
**Created:** [July 8, 2026, 10:30pm UTC](https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122 "2026-07-08T22:30:28Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jess](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/jess/32/605_2.png) [@jess](https://community.nextw.com/u/jess)\
**Post date:** [July 8, 2026, 10:30pm UTC](https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122/1 "2026-07-08T22:30:29Z")

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I want logic to run for selected detail rows selected within an HD structure. I’ve tried adding a received selection filter to my “fetch detail records” action in UI logic over the HD table, however nothing gets returned when I debug. Am I trying to do something that is not supported? If this use case should be supported, could someone point me to a working example?

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**Author:** ![ian.p](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/ian.p/32/427_2.png) [@ian.p](https://community.nextw.com/u/ian.p)\
**Post date:** [July 14, 2026, 3:57pm UTC](https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122/2 "2026-07-14T15:57:06Z")

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Based on the subsequent chat we had, take a look at how the Patch Batch application implements its `Pay` field and consider pairing that with making this app one that enable Single-Click Entry Into Row Cells (release note `Nextbot-5057`) for the most seamless experience.

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**Author:** ![ian.p](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/ian.p/32/427_2.png) [@ian.p](https://community.nextw.com/u/ian.p)\
**Post date:** [July 14, 2026, 4:13pm UTC](https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122/3 "2026-07-14T16:13:11Z")

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I just reproduced the original issue and am seeing selections made on the Detail List be available in a header form action logic block as the received selection. I’m not sure why it didn’t seem to be working that way when you originally tried that approach.

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**Author:** ![jess](https://sea1.discourse-cdn.com/flex001/user_avatar/community.nextw.com/jess/32/605_2.png) [@jess](https://community.nextw.com/u/jess)\
**Post date:** [July 15, 2026, 4:35am UTC](https://community.nextw.com/t/are-received-selection-external-expressions-supported-in-logic-block-builder-for-hd-structures/2122/4 "2026-07-15T04:35:35Z")

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Huh interesting, I ended up using the single-select with a flag rather than received selection from the platform but will keep this in mind if we have another use case come up in the future. Thanks Ian!