In vue, the value passed by $set can't get its next attribute?

In

vue, I want to get the value of the callback API during the getDepartmentCommon callback, but I can only get the res object during the callback, but I can"t get the res.options,. Some people say that it is because my res is set, so how can I get the attribute value of res?
Vue.js asynchronous
Sep.16,2021

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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-64f5-1b3688a-2b86a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3688a-2b86a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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