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Dynamics 365 Community / Forums / Microsoft Dynamics 365 | Integration, Dataverse... / How to limit the numbe...
Microsoft Dynamics 365 | Integration, Dataverse...
Suggested Answer

How to limit the number of related records to a given number

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Posted on by KoJaPD 38

Dear all,

How can I limit the number of related records?

The use case: 

- Entity "Location" has a field "Can hold multiple items"

- Entity "Item" has a lookup field "Location"

- When an item gets a Location assigned that already has an item assigned to it (in the case "Can hold multiple items" = False), it should be prevented somehow (indicating that the chosen location already has reached its limit)

How can I achieve this? I have tried a custom plugin, but it seems that this does not prevent anything; see code here : OneOrMultipleItemsPerLocation.cs (github.com)

A more general use case would be to have a numeric field "number of maximum items on this location" that would prevent to have more than this number assigned to this location....

Thanks,
Koen

  • Suggested answer
    a33ik Profile Picture
    a33ik 84,331 Most Valuable Professional on at

    Hello Koen,

    Can you please provide the screenshot that demonstrates how you registered the step for this plugin?

    Generally speaking, you chose the proper direction - on create of the child check the number of child records for a particular parent.

    In your case I believe the following line breaks the code:

    if (context.InputParameters.Contains("Target") && context.InputParameters["Target"] is cr510_Item item)

    the reason is that "Target" is actually of type Entity - it doesn't come as your late-bound entity.

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