How to retrieve the size of a file being uploaded using a!fileUploadField() sail

abhinavg over 9 years ago

How to retrieve the size of a file being uploaded using a!fileUploadField() sail component on sail form and restricts the user to upload a file larger than a certain limit.

Is it correct that document(ri!file, "size") will work only when form is being submitted as document being uploaded is being saved on Appian DMS and not before if sail form is not being submitted

Attached a sail form snippet, need to capture the size being circle on form

Thanks !

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0 Eduardo Fuentes
Appian Employee
over 9 years ago

That's correct. Before submitting the form you can't do anything with the document, it's a disabled object in Appian whose local ID is still considered invalid; once you submit the form the file is placed in the right directory with a new local id.
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0 abhinavg over 9 years ago

Eduardo... then how can i do file size level validation on sail form
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0 Eduardo Fuentes
Appian Employee
over 9 years ago

You can't until the form is submitted, you then check within the process using document(pv!file, "size") and if it exceeds the size delete the document and loop back showing an error message to the user
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0 abhinavg over 9 years ago

That was done already but business wants to restrict the user to hit upload button, if file size exceeds a defined limit....

BTW, is there any way to retrieve the value being circled in the post attachment, if not can it be added as a future enhancement
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0 Eduardo Fuentes
Appian Employee
over 9 years ago

You can't operate with the document within the form itself at all. This is not possible without submitting the form.

However, you can control this globally in custom.properties for all forms

## The maximum allowed size in bytes for a document
resources.appian.ac.collaboration.MAX_UPLOAD_FILE_SIZE=1024000000
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0 abhinavg over 9 years ago

## The maximum allowed size in bytes for a document
resources.appian.ac.collaboration.MAX_UPLOAD_FILE_SIZE=1024000000

this custom property will fire at the form level before submission ?

if Yes, then it will impact the other file uploading functionality in other applications
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0 Eduardo Fuentes
Appian Employee
over 9 years ago

Yes, this will generate an error message right after the user tries to upload the document without the need for submitting the form (see attached C:\\Users\\eduardo.fuentes\\Desktop\\max_file_size_exceeded.swf video where I set the maximum to 5MB).

This is a global setting that applies to other forms. That's the only available option that doesn't require you to submit the form.
max_file_size_exceeded.swf
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0 abhinavg over 9 years ago

Thanks Eduardo .. but concern is that this global property will effect other application running currently and going to be live in future.
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0 Eduardo Fuentes
Appian Employee
over 9 years ago

Those are the two options available: the setting for an in-form & before-submission validation of the size or checking within the process for an after-submission validation.
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0 abhinavg over 9 years ago

Thanks ..will update the Business on same !
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