Symptoms
To replicate the issue:
[Design time]
1. have a img/file attachment and a save button
2. save button > on click > validate the attachment control as required
[Run time]
3. upload a huge file (10mb). While the file is uploading, click save. The form will pass validation.
Some findings on smartforms behavior:
1. While the file is in "uploading" state, it passes the "control contains a value" condition. (i.e. attachment control !=empty)
2. In a data label, assign an expression as the value of the attachment control.
Result: The value will be empty while the control is in "uploading" state. When the attachment has completed upload, the value will be reflected.
Diagnoses
N/A
Resolution
This is a known issue. Here is the workaround:
1. Add a data label to the form/view
2. Set an expression to the data label, and map the value of the attachment control.
3. Add a condition to check if the data label is populated. If the data label is populated, the attachment control should have finished uploading.