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Updating multivalue lookup column

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Posted on by DevanKSmith

So I am trying to update a lookup column in a list that can hold multiple values. And I can not figure it out for the life of me.

This is what I am trying to do. The variable ChildList is an array of Id's it looks as such [{Id: 'theactualid'},{},{}].
What could Ibe doing wrong or do I need to change?

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Michael E. Gernaey 53,335 Super User 2025 Season 2 on at

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Hi @DevanKSmith

Welcome. Just curious why not use Update Item, versus making the call?

It would be much easier to do with Update Item.

Are you open to doing that?

If I have helped you, I would really appreciate if you please Mark my answer as Resolved/Answered, and give it a thumbs up, so it can help others

Cheers

Thank You
Michael Gernaey MCT | MCSE | MCP | Self-Contractor| Ex-Microsoft
https://gernaeysoftware.com
LinkedIn: https://www.linkedin.com/in/michaelgernaey

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DevanKSmith 6 on at

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I am dynamically taking in the list name from power apps and when doing that the update Item doesn't populate all the columns of that list like it would if you choose the list from the options presented.

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David_MA 12,966 Super User 2025 Season 2 on at

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You need to get your variable to return the values so they are formatted like this:

{ "formValues": [ { "FieldName": "Animals", "FieldValue": "Dog;Cat;Mouse" } ] }

If your variable doesn't include the parentheses but just the semicolon separated values, put the variable inside quotes in the body of the HTTP request.

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