crm/database/migrations/20220906062126_add_initials_to_employee.php

<?php

use think\migration\Migrator;
use think\migration\db\Column;
use app\model\Employee;
class AddInitialsToEmployee extends Migrator
{
    /**
     * Change Method.
     *
     * Write your reversible migrations using this method.
     *
     * More information on writing migrations is available here:
     * http://docs.phinx.org/en/latest/migrations.html#the-abstractmigration-class
     *
     * The following commands can be used in this method and Phinx will
     * automatically reverse them when rolling back:
     *
     *    createTable
     *    renameTable
     *    addColumn
     *    renameColumn
     *    addIndex
     *    addForeignKey
     *
     * Remember to call "create()" or "update()" and NOT "save()" when working
     * with the Table class.
     */
    public function change()
    {
        $table = $this->table('employee');
        $table->addColumn('initials', 'string', ['comment'=> '首字母', 'default'=> ''])
            ->update();

        $where[] = ['name','<>',''];
        $where[] = ['name','not null',''];
        $arr = Employee::where($where)->column('id,name,initials');
        foreach ($arr as $k => $v) {
            $initials = strtoupper(substr(hanzi2pinyin($v['name']),0,1));
            Employee::where('id',$v['id'])->update(['initials'=>$initials]);
        }
    
    }
}