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Sharepoint Post Request - ValidateUpdateListItem

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Hi All!

Recently I have started playing with Flows and have had some success, unfortunaltey, I now seem to be in an issue that is well documented - Updates to a list re-triggering a flow in a Sharepoint List. I have the below node in my flow that returns this error:

{"status": 400,

"message": "Value cannot be null.\r\nParameter name: formValues\r\nclientRequestId: 1a290845-d9f4-4bc1-83db-ab6f29fd61ee\r\nserviceRequestId: b2a1f59e-4012-9000-f494-e36f7a7dca23",

"source": "mysiteurl (replaced from actual url) /_api/web/lists/GetByTitle('Cash%20&%20Mitigation%20Benefits%20Tracker')/items(9)/ValidateUpdateListItem",

"errors": [

"-2147467261",

"System.ArgumentNullException" ]}

My Sharepoint list column I am referencing is a mandatory field, and is a Choice type field. The "Pending" option is a selectable option

MS Flow Node set up

I have been referencing this post for this task:

https://powerusers.microsoft.com/t5/I-Found-A-Bug/Flow-Existing-item-is-modified-triggers-when-a-new-item-is/td-p/88141/page/2

Any help would be greatly appreciated!

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Using flows

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RezaDorrani 12,143 on at

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Hi @Anonymous

try with headers

accept application/json; odata=verbose (all lower case - not sure if this matters though)
content-type application/json; odata=verbose (all lower case - not sure if this matters though)

if-match and x-http-method not required

I tried with a mandatory choice column and it worked

Regards,
Reza Dorrani

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Community Power Pla... on at

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Hi @RezaDorrani

Thanks for this, removing the X-HTTP header let it work!
Now have a new problem, if you happen to have any gems on this! I did the POST request to try to avoid re triggering the Flow when I do an update within it, unfortunately this method still triggers the flow and loops, any thoughts?

Thanks for your help!

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v-yamao-msft on at

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Hi @Anonymous ,

Do you want to update a Choice field using action Send an HTTP request to SharePoint?

The following configuration is working fine for me, please check it for a reference.

Best regards,

Mabel

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RezaDorrani 12,143 on at

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Hi @Anonymous

Set bNewDocumentUpdate to false and try

Regards,
Reza Dorrani

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Gopi 17 on at

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Hi, my flow run successfully with below body but value is not updating in share point library. Do you have any solution for this?

{
"formValues":[
{
"FieldName": "DocumentType",
"FieldValue": "SecureDocuments"
}
]
}

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