Distinct on Lookup of many-to-many relationship

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Posted on by SLMR

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Good morning,

i have following data-model:

Customer (1-n) --> Projekt (1-n) --> Case (n:m) -->employee (Benutzer).

In a canvas app i need a gallery where only the customers are visible an employee is working for.

It is no problem to get the cases and therewith also the information about the projekts and customers:

LookUp(Benutzers,Fullname=User().FullName).'Cases (cr8ec_Projekt_Zugehoering_ref)'

But as this is on case level i will have multiple entries for the same customer.

As i can directly display the customer info in the gallery via (ThisItem.Projekt.Customer.name) it should be possible to filter the lookup somehow against the customers.

I think i will have to go to the projekts first via a next lookup.

But i am not complety sure on how to do this.

Any idea is welcome

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Building Power Apps

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v-jefferni on at

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Hi @SLMR ,

Could you please share more details about your scenario? Do you want to filter customers that current logged in user is working for?

If this is the case, please try below formula:

Distinct(AddColumns(LookUp(Benutzers,Fullname=User().FullName).'Cases (cr8ec_Projekt_Zugehoering_ref)',"Customer1",ThisRecord.Projekt.Customer.name),Customer1)

Best regards,

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SLMR 518 Moderator on at

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Thanks a lot for the quick answer.
Works like charm for my application.

Just another short question:
Is it possible to alter the expression so that i can get the real customer entity.

With your solution i can fill my gallery as i want. I can get all other information of the selected customer by using lookup, so it is fine.
But getting the entity maybe interesting for the future.

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v-jefferni on at

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Hi @SLMR ,

What do you mean by get real Customer entity? After you have unique customer names, you can simply use below formula to get rows from Customer entity:

ForAll( Distinct(AddColumns(LookUp(Benutzers,Fullname=User().FullName).'Cases (cr8ec_Projekt_Zugehoering_ref)',"Customer1",ThisRecord.Projekt.Customer.name),Customer1) As CC, LookUp(Customer, name = CC.Value) )

Best regards,

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SLMR 518 Moderator on at

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Thanks again.
That saves me a lot of time.
Have a nice day

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