hainan/app/Models/AgentSetting.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;

class AgentSetting extends BaseModel
{
    use HasFactory;

	protected $fillable = ['agent_id', 'setting'];

	public function __construct(array $attributes = [])
	{
		parent::__construct($attributes);
		$this->timestamps = false;
	}

	public function scopeVal($query, $agent_id, $key)
	{
		$setting = json_decode($query->where('agent_id', $agent_id)->value('setting'), true);
		return $setting[$key] ?? null;
	}
}