Adding date and time stamp to a pdf file name

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Posted on by gm355

Apologies for the beginner question, I'm new to Flow and don't have much coding experience.

I have a Flow that extracts pdf's from an email and adds a date and time stamp.

This is the code I'm using, I've used this before successfully.

concat(formatdatetime(triggerBody()?['DateTimeReceived'],'yyyy-MM-dd-hhmmss - '),item()?['Name'])

This is the error message I'm getting:

InvalidTemplate. Unable to process template language expressions in action 'Compose' inputs at line '1' and column '2665': 'The template language function 'formatdatetime' expects its first parameter to be of type string. The provided value is of type 'Null'. Please see https://aka.ms/logicexpressions#formatdatetime for usage details.'.

Any help would be much appreciated.

Thanks.

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Building flows

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Gristy 2,429 on at

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Hey there,

If you inspect your flow trigger, what is showing up under the DateTimeReceived variable? It looks as if it is blank and therefore this is why the flow is erroring.

You could use utcNow() expression and a "Convert timezone" action to convert into you rlocal timezone if you just need the time the flow action is run.

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gm355 61 on at

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Hi @Gristy ,

Sorry, how do I do this? I'm new to Flow.

"If you inspect your flow trigger, what is showing up under the DateTimeReceived variable?"

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Gristy 2,429 on at

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hi,

Open your failed flow where you copied the error from, and click on the top box i.e. the trigger.

this will show you the values passed to your flow.

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gm355 61 on at

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I see this under Outputs>Body

"receivedDateTime": "2019-09-20T22:34:12+00:00",

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Gristy 2,429 on at

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Hey,

please post a screenshot.

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gm355 61 on at

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Gristy 2,429 on at

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Thanks,

If you add a compose action and paste: @{triggerBody()?['DateTimeReceived']}

Inspect the compose action after a test to see ift he varaible is displaying OK

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gm355 61 on at

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Thanks, got the variable, now just need to concat it into the file name.

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v-bacao-msft Microsoft Employee on at

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Hi @gm355 ,

Please try to use this expression:

concat(formatDateTime(triggerBody()?['receivedDateTime'],'yyyy-MM-dd-hhmmss-'),item()?['Name'])

Best Regards,

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gm355 61 on at

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Thanks, this worked as well. Not sure why my code above didn't work, it was very similar.

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