Check document size after selecting document from uploader in a form sail

emanueled8741 over 7 years ago

I have a form sail with a fileUploadField. When I select a file, I need to check the size and disable a button if is greather than 1MB.
The check is the following:
or(rule!APN_isBlank(save!value),document(save!value,"size")>1024000)

When a perform this check an error appear:

Interface Definition: Expression evaluation error: An error occurred while executing a save: Expression evaluation error at function 'document' [line 886]: Error evaluating function 'document' : Document Does Not Exist or has been Deleted

How can I resolve this problem?
Tanks

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0 Rahul Gundu over 7 years ago

Please go through the below post. That'll help.
forum.appian.com/.../e-141769
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0 chandu
A Score Level 2
over 7 years ago

have u had a chance to check the post forum.appian.com/.../e-153370
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0 mayureshs7821 over 7 years ago

@emanueled874 you will get the size of the document from below expression
a!fileUploadField(
value: ri!doc
).uploadedDocumentSize
pass this size to another expression rule to check the size is greater than 1MB or not.
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0 jaisym over 7 years ago

@mayureshs782 this check will not work in 17.1 version. "a!fileuploadField()" is different in the interface designer vs tempo. You can capture the uploadedDocumentSize in the interface designer, but not in Tempo.
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0 mayureshs7821 over 7 years ago

@jaisym you are right. I tried it on 17.1 version and it is not working as expected.Is there any alternate solution?
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0 Mike Schmitt over 7 years ago

I recommend you consider using the utility rule I posted a few weeks ago near the end of the comments section in the link @chandrasekharg posted above. But keep in mind that the filesize returned is very approximate - like "2.1 MB", etc.

@jaisym: the rule I posted in the above thread handles both the old and new functionalities. The file upload size is still in the returned properties in the new version, it's just been moved around a bit in the data structure.
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0 Mike Schmitt over 7 years ago

Here's the rule I'm referring to.
New File Upload Properties Rule.sail
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0 emanueled8741 over 7 years ago

I resolve the problem by using:
find("MB",a!fileUploadField(value: local!fileToUpload).uploadedDocumentSize)
local!fileToUpload is set with the file selected from the fileUploadField.
If the find function return true, I consider the file size is equal or greather than 1MB.
But this solution is not optimal.
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0 Mike Schmitt over 7 years ago

@emanueld874: I highly suggest using a custom expression rule such as the one I posted above to return the size property. As @jaisym posted above, the in-task rendering in 17.1 has changed such that it doesn't work the same way anymore - and since this is not an officially supported method, it's liable to change at any time without notice, meaning if you have it hardcoded into a form then they'd all break and all need to be manually updated (whereas if it's all in one expression rule, that rule could be updated to use the new logic).
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0 ranveerr over 7 years ago

Yes this is not the correct way to do validation for file upload, but if you need please try below code to get the SIZE in 17.1
a!fileUploadField(value: ri!document),contents.size
Make you that this will not work while implementation and testing in rule or UI. This will work only if UI is executed in SITES or TEMPO
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