I’ve written about my struggles with Option Set Choice fields columns before both on converting words into their choice integer equivalent or converting’s integer values for choices into the human readable ‘Label’ value. But things are rarely perfect the first time around, I learnt a few things since then, and I have been collaborating with some seriously smart developers too. In the past I have ignored the pesky Choices column type (Multi Select Option Set) too but not anymore! This post will show you how you can use Dataverse Custom Actions to work with all variations of choice/choices conversions.

Child Flow versus Custom Action

If you are working with automation in Dataverse you will want these magic conversion methods to be easily reusable between flows. We can do this by using either a Child Flow or Custom Action. A custom action for converting Dataverse Choice(s)? Yes! A smart guy called Guido Preite has created two very magical Dataverse custom actions that can be use in your flows to wrangle with all your Choice metadata related problems.

Both have their pros and cons but the results are the same either way.

Child Flows

• Good: can be triggered from any flow in the same environment, you have full control over the configuration, and they are deployed with all your other customisations in a single swoop

• Less Good: you have to build and maintain it yourself, performance wise probably a little slower, you need to create a HTTP with Azure AD connection and it must be run as a specific account rather than calling user context

Custom Action

• Good: can be triggered from any flow in the same environment, prebuilt ready to go using the same Dataverse connection reference as the rest of your flows, runs in context of the flow calling user, it handles failures gracefully (without extra flow configuration steps) and more simplified inputs required to get the result

• Less Good: less customisable/configurable, requires installation of an additional solution, single choice only and it makes you feel really dumb for creating an entire flow to achieve the same thing a custom action can do in a quarter of the time

This post will focus on the custom action side of things. Check out my previous posts linked above for some child flow inspiration or watch this space for future posts.

For reference, our model Choice as follows:

Custom Action Choice Conversion

You will first need to download and install the Metadata Custom APIs Managed Solution. Then within the flow you want to convert choice(s) in add a ‘Perform an unbound action’ Dataverse action. Search for the actions ‘GetChoiceInfoFromValue’ and ‘GetChoiceInfoFromLabel’ (depending on which way round you are trying to convert).

Convert Integers into Words - Single

Results

Lots of helpful outputs here but the important ones are ‘ChoiceFound’ which tells you if a match to the provided if it was found, and a ChoiceValue which is the integer equivalent from the data you provided. Magic!

Convert Words into Integers - Single

Results

Same as above - magic!

What about Multi Select Option Set Choices?

Enter our model Choices column!

The custom actions remain the same but we just need to do some light flow gymnastics to extract the multiple results.

Convert Multiple

Converting words into integers really depends on what your words are being separated by, in this example my separator is ‘; ‘ but this could be anything at all!

If found, append

First, check to see if the match was found, and is so appending the value to the string.

Choice Found - Condition
outputs('GetChoiceInfoFromLabel')?['body/ChoiceFound']
is equal to
true

If Yes
AppendTradeRegions - Append to string variable
Name TradeRegions
Value outputs('GetChoiceInfoFromLabel')?['body/ChoiceValue'] (followed by a comma)

So it’s not the most visually thrilling post, but this custom action thing is superbly powerful yet simple to use. Big thankyou to Guido Preite for creating and sharing his work with the community.