Embedded Canvas App Pt 2 – Create Gallery n Polymorphic Lookup

Gallery filtering

1. How to refer to a particular field from the host entity?
   • [@ModelDrivenFormIntegration].Item.’Field Name”

Polymorphic Lookup

1. What is Polymorphic Lookup
   • A lookup field that can refers to more than one entity.
   • Example:
     • Lookup:Owner – User/Teams entity
     • Lookup: Customer – Account/Contact
     • Lookup: Regarding – Account, contact, opportunity, case etc
2. So…what is the problem with that?
   • When tell the app to perform a function (ie Filter) on a value in a polymorphic lookup, the app does not know which entity to refer to.
3. Oh…How do I filter a list based on a Polymorphic lookup then?
   • Using Is Type…As Type function
   • Is Type – to tell the app studio to check if the record is referring to the specified entity
   • As Type – to tell the app studio which entity to refer to
   • Important – This does not support delegation
4. Examplet1

References:
Embedded Canvas App Pt 1 – Introduction
https://eelane.com/2019/08/09/embedded-canvas-apps-pt-1-introduction/

Polymorphic Lookup
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/working-with-references

Natraj Blog:
https://dreamingincrm.com/