How can i write nothing or skip writing if empty?

[The_blue]

If a cell the flow is pulling from (excel file) is empty i want the SP list to have a blank entry but it won't allow it...

I tried this: 

if(empty(items('Apply_to_each')?['Expiry date']),'',addDays('1899-12-30',int(items('Apply_to_each')?['Expiry date']),'yyyy-MM-dd'))

(Green bit works fine for filled cells, red is my issue..)

And got this:

The runtime value '""' to be converted doesn't have the expected format 'String/date'.

Any ideas how to write nothing or just skip? 

[Expiscornovus · Accepted solution]

Hi @The_blue,

Can you try and use null instead of ''?

if(empty(items('Apply_to_each')?['Expiry date']),null,addDays('1899-12-30',int(items('Apply_to_each')?['Expiry date']),'yyyy-MM-dd'))

[v-LilyW-msft]

Hi @The_blue 

Please take a try with @Expiscornovus 's solution, it is works and could solve your problem.

If your problem has been solved by @Expiscornovus 's solution, please go ahead and mark the post as solved by clicking “Accept as Solution” so that this thread will be marked for other users to easily identify!

In addition, if your 'Expiry date' column is Date data type , you can simplify your formula by the following way.

Select ISO 8601 for DateTime Format field in List rows present in a table action.

Then you don’t need to use addDays and int function to format the date in excel.

The formula can be changed to:

if(empty(items('Apply_to_each')?['Expiry date']),null,items('Apply_to_each')?['Expiry date'])

Best Regards.