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Function to set null

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Posted on by kklauder

Hello,

I'm trying to update data in my custom API using PATCH. I am unable to update a field to null. I have date, string and number fields that a nullable. Is there a built in power apps function that I can call the will put null in my API Patch data for fields that i want changed to blank.

Thanks

-Ken

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Building Power Apps

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kklauder 4 on at

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Re: Function to set null

As an example in a save button

I want to be able to call my custom API like the following for a date:

WOSAPI.WOSV4PatchByWONUM("111", {COMPLETEDATE: If(Text(DatePicker3.SelectedDate, DateTimeFormat.UTC) = "", NULLFUNCTION, Text(DatePicker3.SelectedDate, DateTimeFormat.UTC))})

This NULLFUNCTION would put null in my patch body

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murali on at

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Re: Function to set null

We currently don't have a function for that.

I have added it as an Idea to Ideas board

https://powerusers.microsoft.com/t5/PowerApps-Ideas/Function-to-produce-blank-value/idi-p/14353#M964
Please upvote on this so the team can prioritize this.

For now, I can think of a workaround using our current language syntax: unspecificed value in a If condition is treated as NULL.

If you could change your expression to the following, it will work:

WOSAPI.WOSV4PatchByWONUM("111", {COMPLETEDATE: If(Text(DatePicker3.SelectedDate, DateTimeFormat.UTC) <> "", Text(DatePicker3.SelectedDate, DateTimeFormat.UTC))})

meaning if the value is empty string, no value i.e. NULL is specified.

Hope this helps

Thanks
Murali

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kklauder 4 on at

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Re: Function to set null

Hello,

Looks like the work around you send me does not send null to my api. It only seems to ignore the field update.

-Ken

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Vicky_Song on at

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Re: Function to set null

@kklauder, I think you're right. And as murali suggested, please submit one request in the Ideas forum.

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Meneghino 6,949 on at

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Re: Function to set null

Hi all, is there any update on this? When will we be able to set fields in data sources to null?
Thanks for the hard work.

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