Formidable with express cannot return renamed data

the renamed data cannot be returned after receiving the file using formidable and renaming the saved file

The last picPath returned by

clipboard.png
was always empty, and it turned out to be asynchronous, and then I wrote it in the callback of from.on ("end").

what should I do to return the file name to the front end?
Mar.16,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf0183-31450.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf0183-31450.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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