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Trigger on create N:N Relationship in CDS

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Posted on by NielsD

Hi,

We are migrating workflows to flows and the data model is fixed. We have a requirement to trigger a flow when a relationship is established between two entities in a N:N relationship. Since CDS creates a third entity in between to do the mapping, the idea was to take the CDS (current environment) trigger and configure it on the create of the in between mapping entity as "xxx_xxx_entity1_xxx_entity2. We also tried to suffix it with "Set", but the trigger gets corrupted saying the entity is not present in the metadata cache.

However, whatever we try, the flow is not getting hit. No run history is present neither. Is this caused because it is an "invisible" entity? Is there a workaround to achieve this? Since it's a migration, there is no possibility to create the "third" entity ourselves.

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Building flows

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NielsD 24 on at

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v-alzhan-msft on at

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Hi @Niels_ ,

Could you please share a screenshot of the configuration of your flow?

Best regards,

Alice

Community Support Team _ Alice Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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NielsD 24 on at

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Hi Alice,

Thank you for your reply.
I've added the screenshot. It's a really simple flow to just see if I get it to work. But the trigger doesn't seem to be hit.

Thanks!

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v-alzhan-msft on at

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Hi @Niels_ ,

Could you please choose the entity from the drop down list in the trigger?

Best regards,

Alice

Community Support Team _ Alice Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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NielsD 24 on at

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Hey @v-alzhan-msft ,

Unfortunately, I'm not able to do that, since it is an intersect entity, created behind the scenes on the N:N relationship. However, the trigger is registered since I do not get an error when saving the entity is not present. So it does exist! So this should trigger when creating an N:N relationship.

Kind Regards

Niels

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Hamish Sheild 3,005 Most Valuable Professional on at

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Hi,

I am also trying to figure out the same thing. I don't think it is possible though.

I can create the Flow in the same way as @Niels_. The Flow saves fine without errors and I can even refer to the intersection attributes that are outputs of the trigger action in the following actions in the Flow. The Flow just doesn't trigger when the intersection record is created.

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DaxjKent 110 on at

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Did you ever come up with a solution or work around on this?

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NielsD 24 on at

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Hi

No I'm still figuring this one out. Currently on the long-term shelf though

Kr

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yashag2255 24,769 Super User 2024 Season 1 on at

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Here is one way you can do it: https://www.bythedevs.com/post/trigger-a-flow-when-a-record-is-created-in-an-n-n-relationship-entity-in-cds

Hope this Helps!

If this reply has answered your question or solved your issue, please mark this question as answered. Answered questions helps users in the future who may have the same issue or question quickly find a resolution via search. If you liked my response, please consider giving it a thumbs up. THANKS!

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NielsD 24 on at

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Thanks a lot, did the trick

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