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Check if File Field is Blank



I would like to have a formula field that will check if the File Field is blank or not. Below is the formula. It validates, however, it does not work as expected.

CASE WHEN [@field:Images] IS NULL THEN 'No image attached' ELSE 'Image available' END

I used this format in other field like Text(255) and I am getting the expected output. I am wondering why it does not work in File DataType. 

Can you please help me? 


Thanks in advance!



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Hi @IamBlossom

For File DataTypes, you need to use SQL's "DATALENGTH" to measure if the field has content or not. It is a behavior that NOT NULL or IS NULL will not work for File Datatype.

Use this instead:

CASE WHEN DATALENGTH([@field:Images]) = 0 THEN 'No image attached' ELSE 'Image available' END


Hope this helps!

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