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ridgetech119
Regular Visitor

Planner Tasks - Writing NULL to Start or Due datetimes

Is this possible? We need to nullify Planner Tasks Start Times if it already has a date. I've tried adding a Compose that uses fx NULL, but then it turns into a literal '' when attempting to write to a planner tasks start/due.

11 REPLIES 11
StretchFredrik
Multi Super User
Multi Super User

Try using string(' ')

I get:

"message": "The request is invalid:\r\nCannot convert the literal ' ' to the expected type 'Edm.DateTimeOffset'.",
Previously, similar message:
"message": "The request is invalid:\r\nCannot convert the literal '' to the expected type 'Edm.DateTimeOffset'.",

Hi @ridgetech119 ,

 

Please check that you are using the NULL "value" in your expression, for example:

 

ekarim2020_0-1694729529589.png


Ellis
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Hi @ekarim2020 ,

I get the 2nd error message in my above post when I try this. Did it work for you?

Hi @ridgetech119 ,

 

Here is the sample data followed by the runtime output of my demo flow:

ekarim2020_0-1694732290325.png

ekarim2020_1-1694732299178.png

 

Flow run:

ekarim2020_2-1694732356627.png

 

Can you share the exact expressions used in your flow? Please provide screenshots too.

 


Ellis
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ridgetech119
Regular Visitor

Hi @ekarim2020 ,

 

Sure, below is just a null for expression to test and it doesn't work.

ridgetech119_2-1694733227919.png

 

Raw inputs on failed action:

ridgetech119_3-1694733377160.png

 

Can you show me your exact expression in the Update a task action?

Hi @ridgetech119 ,

 

Please post a screenshot of the error message and the screen of the runtime output at the point where the flow failed.


Ellis
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ridgetech119_0-1694734775336.png

 

Hi @ridgetech119 ,

 

I am just using the null value in the expression:

ekarim2020_0-1694736840337.png

 

ekarim2020_1-1694737052227.png


Ellis
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If I have answered your question, please mark the post as ☑️ Solved.
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There are spaces but I can't do anything about it. Specifically, when I cursor all the way to the left, I have to press the right-arrow twice as if there was a space there, but backspace and delete doesn't seem to remove this space without removing the null with it. I mean, it's a pretty simple ask... click a input field, click Expression, type null, click OK and it takes. Seems to work for EVERY other null usage I have in my flow. Just not this planner update task. I am using Power Automate web; are you using the Desktop version?

ridgetech119
Regular Visitor

Hi @ekarim2020 ,

 

Further testing shows that it works when I use a Manually trigger a flow action.

ridgetech119_0-1694779246928.png

 

My flow is triggered from Sharepoint when an item is created or modified.
Designer:

ridgetech119_2-1694779835384.png


Run details:

ridgetech119_1-1694779641079.png

 

Is this expected behaviour when using different triggers?

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