On the problem of Mini Program transferring data in wepy

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I want to know why the item, can"t be passed, that is, the item that the parent component gets in the loop, why can"t it be passed to the child component?

Python javascript node.js html5 wepy
Mar.09,2021

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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-64f5-1bca416-38da1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bca416-38da1.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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