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'Multiple levels of many-to-one relationship expansions aren't supported'

I have an error I cannot get around here which is 'Multiple levels of many-to-one relationship expansions aren't supported'

 

 

Screen Shot 2021-06-26 at 21.25.01.png

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J_Anderson
Frequent Visitor

For anyone else who runs into this topic... We solved this limitation with a series of collections that focused on changing lookup values to text. You can collect your lookup columns and store them as text with the text function... then perform subsequent lookups based on the newly stored text value to just assign the appropriate text value to each record in the collection that'll now behave as your fact table... Just store a final master collection with all of the text columns you need and work with that as needed (we wanted to filter galleries as parent selections were made in dropdowns). You're basically just collecting for a dataset like you would use a query in Access. We ended up using a series of 5 collections in a single button (will probably just run OnStart and then Patch the collection as needed long term). Not sure if this is best practice for dealing with this topic, but we did get the functionality we were looking for (along with a migraine). We have a data model that requires dynamic functions based on filters 3-4 tables away, if that makes sense. We are thinking that this collection based workflow is the best way to tackle the lookup limitation long term. Figured I'd share since this one gave us a headache. Good luck! 

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10 REPLIES 10
CNT
Super User
Super User

@philkky12 You can go only one level deep with relationships. In your code you are going 2 levels deep. Also, I'm not sure what ThisTicket is refering to?

ThisTicket represents TicketId (the Ticket table)

 

I have three tables here, Tickets which are linked to Assets, and Sites which are linked with Assets.

 

Is there any way I can solve this?

@philkky12 Want to clarify a few things,

  • You are having a LookUp in the Items property of a Gallery. LookUp will return the first matching record, which means your gallery will have only one record. Is that what you want?
  • You are looking for a record in the Assets table and trying to filter it. For sure ThisTicket will not work. Where is the Ticket your are trying to filter on? Is it another gallery, a combobox?

 

Correct, was jus testing it. It should be a Filter. 

 

ThisTicket gets set on the first screen which is a list of all of the tickets, from that point the context is passed through all other screens.

@philkky12 Is ThisTicket a collection of records from the Tickets table? 

ThisTicket is a single record from the Ticket table

@philkky12 Try this,

Filter(Assets, 'Site Id.'Site (cra0d_siteid)'=LookUp(Ticket, 'Site Id'=ThisTicket.'Site Id').'Site (cra0d_siteid)')

I get Name isn't valid. This identifier isn't recognized

 

Screen Shot 2021-06-26 at 22.34.35.png

@philkky12 I don't know the exact field names you have in your tables. Please check them!

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