hainan/app/Models/UserChannel.php

<?php

namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;

/**
 * 我的频道
 * Class UserChannel
 * @package App\Models
 */
class UserChannel extends BaseModel
{
    use HasFactory;

    public function getChannelsAttribute($value)
    {
        return json_decode($value, true);
    }

    public function setChannelsAttribute($value)
    {
        return json_encode($value);
    }
}