Implementation of using AR to directly output one-dimensional array in A Bei job / Yii

I haven"t given an AR assignment for a long time. Today we"ll take a look at my needs.

there is a datasheet, user (id, username and created_at, with a total of 4 records. This is required for the job. Use AR to achieve the following results:

An one-dimensional array whose key is user"s id, array and value"s user"s username, is similar to the following result

[
    1=>"abei",
    2=>"abei2017",
    11=>"abei2018"
]

remember, only use AR, without resorting to other class libraries, such as Helper::map

Yii2

Mar.28,2021

php built-in array: array_column ()

yii's built-in indexBy and column methods are used to implement the requirements in the problem.

  https://nai8.me/article/detai.


										
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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-64f5-1bd3f94-30eb8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device") 
 MySQL Errno : 1021 
 Message :  Disk full (/tmp/#sql-temptable-64f5-1bd3f94-30eb8.MAI); waiting for someone to free some space... (errno: 28 "No space left on device") 
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