Create many-to-many relationship using Flow

[Mike_Guzowski]

Hi,

I have 2 CDS entities related with many-to-many relationship. I want to relate 2 records from both entities together but unfortunately Microsoft Flow can't do it. Using PowerApps is not an option (need to do it in a loop). How can I achieve it?

Regards,

Mike

[LeeHarris · Accepted solution]

Hi @Mike_Guzowski 

When a many to many relationship is created in the CDS, I believe this is actually creating a link entity with two 1 to many relationships. This link entity is then hidden and you have no way to access or modify it. In order to get more control over the relationship and achieve your requirement, I think you will need to create the link entity manually.

For example if you have Entity A and Entity B that need to be linked using a many to many. Create a new entity (Entity C) and add lookup fields to both Entity A and Entity B. This will create a 1 to many from your link entity to both A and B, and therefore creating a many to many between A and B.

Then, when you want to create the relationship within Flow. You simply create a new record (Entity C) and set the lookup values for Entity A and Entity B.

Hope that all makes sense.

[Mike_Guzowski]

Thanks @LeeHarris . This is how I've workarounded this relationship so far but TBH I think it's a temporary solution. Especially that CDS allow for creating N:N relationship so the lack of functional support seems to be a bug to me.

[Digit89]

This article is a way better solution instead of creating the record in the NN table.