laravel orm 切库问题

家人们，咋就是说写的全局查询作用域为啥不生效呢

我是一个独立库没有商家id，一个sass库有商户id，这两个库的表和数据结构完全一直 我要做sass和平台的区分，所以只要切个库，加个where商户id条件限制就好了，我是这么写的

<?php

namespace App\Models;

use App\SassScope;

class Model extends \Illuminate\Database\Eloquent\Model
{
    protected static function boot()
    {
        parent::boot();
        static::addGlobalScope(new SassScope());
    }
}

<?php

namespace App\Scopes;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Scope;

class SassScope implements Scope
{
    public function apply(Builder $builder, Model $model)
    {
        if (request()->has('merchant_id') && ! app()->runningInConsole()) {
            $model->setConnection('sass');
            $builder->where('merchant_id', app('request')->input('merchant_id'));
        }
    }
}

<?php

namespace OfferEasy\Website\WWW\Models;

//use Illuminate\Database\Eloquent\Model;

/**
 * Class Course 地区
 * @package OfferEasy\Website\WWW\Models
 */
class Area extends Model
{
    protected $connection = 'www';
}

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