# Trigger Workflows on association changes?

**URL:** <https://community.hubspot.com/t/trigger-workflows-on-association-changes/65567>\
**Category:** 💬 RevOps Discussions\
**Tags:** revops\
**Created:** [September 21, 2022, 3:28pm UTC](https://community.hubspot.com/t/trigger-workflows-on-association-changes/65567 "2022-09-21T15:28:33Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![JBeatty](https://d10pqhm3lwygmk.cloudfront.net/user_avatar/community.hubspot.com/jbeatty/32/52252_2.png) [@JBeatty](https://community.hubspot.com/u/JBeatty)\
**Post date:** [September 22, 2022, 3:03pm UTC](https://community.hubspot.com/t/trigger-workflows-on-association-changes/65567/2 "2022-09-22T15:03:52Z")

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Hi @ManuelI,

My go to when needing to run workflows on association changes is setting up a calculated property for example on a Company that is a count type, then chose the associatied object type, then for the property just do Record ID. What this means is then that this property just stores the number of a specific object type that is associated to the given object. I then use this and a “Is Known” trigger which goes off whenever a new object gets added. (It also goes off whenever one gets removed, but this can be fixed by copying its value whenever it is known to another property at the start of the workflow, then right before that copy action check which one of those two properties is larger)

Best,

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