What is the good way for WeChat Mini Programs to get multiple picker values directly?

there is a painful need is that the selector data of a form page is obtained from the server data, return several objects, generate several picker, (not necessarily generate several), the user selects the data and clicks the submit button to get the data and send it out.
if it is like input, the submit submission is saved to e.detail.value and the value can be obtained by traversing. Is there any good idea for picker?

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-64f5-1bf431a-31ee4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf431a-31ee4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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