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Cannot convert the literal '' to the expected type 'Edm.DateTimeOffset'.

My flow starts as a form (Manually Trigger a Flow). Part of the form has optional date picker fields for project due dates. 

This flow creates a Planner bucket with six tasks which often do not have due dates. When the due dates in the form are left blank, I'm often getting the error below (but not every time). 

 

{
  "error": {
    "code": "",
    "message": "The request is invalid:\r\nCannot convert the literal '' to the expected type 'Edm.DateTimeOffset'.",
    "innerError": {
      "date": "2021-04-16T13:34:18",
      "request-id": "IDretracted",
      "client-request-id": "IDretracted"
    }
  }
}

 

Screen Shot 2021-04-16 at 9.47.37 AM.png

5 REPLIES 5
fchopo
Super User
Super User

Hi @anthonys123 

Try to use the "null" value inside the due date field. Be careful, "null" should be written as an expression, and not as a string.

null.png

Hope it helps!

Ferran

Did I answer your question? Please consider to mark my post as a solution to help others.
Proud to be a Flownaut!

@fchopo Sometimes there's a due date and sometimes there isn't. Null wouldn't work when a due date is set by the user.  How might I compose a 'Due Date Output' from the user's input whether the field is filled or null?

I have six due dates and my flow is repeated 4 times. So, the cleaner the better. 

Thanks!

fchopo
Super User
Super User

You could use an expression like: 

if(equals(outputs('Get_response_details')?['body/submitDate'],''),null,outputs('Get_response_details')?['body/submitDate'])

Using your form's date question instead of "submitDate".

Hope it helps!

Ferran

Did I answer your question? Please consider to mark my post as a solution to help others.
Proud to be a Flownaut!

@fchopo I'm stumped. Below, I'm working with a submission that has the date entered.

The question on my form is Final Due. When I open the Raw Input, I see; 

 

            "date": {
                "title": "Final Due",
                "type": "string",
                "format": "date",
                "x-ms-dynamically-added": true,
                "description": "Please enter or select a date (YYYY-MM-DD)",
                "x-ms-content-hint": "DATE"

 

The Raw Output is; 

 

    "body": {
        "text": "First",
        "text_1": "Last",
        "text_2": "4545 First St",
        "text_3": "Miami",
        "text_4": "Client Residence",
        "text_5": "Big Building",
        "date": "2021-06-25",
        "date_1": "2021-06-25",
        "boolean": true,
        "date_2": "2021-06-25",
        "boolean_1": true,
        "date_3": "2021-06-25",
        "date_4": "2021-06-25",
        "date_5": "2021-06-25",
        "text_8": "Anthony",
        "text_9": "Active"

 

 

I have tried the following;

 

if(equals(outputs('Get_response_details')?['body/Final Due'],''),null,outputs('Get_response_details')?['body/Final Due'])

if(equals(outputs('Get_response_details')?['body/date'],''),null,outputs('Get_response_details')?['body/date']) 

 

 

All variations are giving me the same error; 

 

Correct to include a valid reference to 'Get_response_details' for the input parameter(s) of action 'Final_Due_1'. 

 

 

Screen Shot 2021-04-16 at 4.00.40 PM.png

This issue i have seen in many cases like date and Integer case. This happens because Flow is trying to post as empty string instead of null even though you have added null in expression.

In Logic app, we used to go to code view and remove curly bracket after @ symbol for the expression. In flow, you need to add full expression including @ symbol to work

 

Example: In code view if you add the above expression, it will look like below:

@{if(equals(outputs('Get_response_details')?['body/Final Due'],''),null,outputs('Get_response_details')?['body/Final Due'])}

 

You need to change like below then it will accept both null value and date value.

@Anonymous(equals(outputs('Get_response_details')?['body/Final Due'],''),null,outputs('Get_response_details')?['body/Final Due'])  => just remove curry bracket after @ in expression

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