Koa-body file upload ctx.request.files is undefined

upload the file according to a koa2 written in the online tutorial and install the koa-body. Postman is used for testing, but an error is reported. The console shows that ctx.request.body.files is undefined
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ctx.request.body{}
ctx.request

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.
Feb.25,2022

has solved the problem of
app.use (koaBody ());
replacing
app.use (koaBody ({multipart:true}));
with


, but I app.use (koaBody ({multipart:true})); is still not good, ask God for advice

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-64f5-1b3270d-403a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3270d-403a0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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