BaoMa/app/Models/Vaccine.php

<?php

namespace App\Models;

class Vaccine extends BaseModel
{

    const FREETYPE = 1, NOFREETYPE =2;
    protected $appends = ['use_count'];

    protected static $_type = [
        self::FREETYPE => 'Ⅰ类',
        self::NOFREETYPE => 'Ⅱ类',
    ];

    public static function getType(){
        return self::$_type;
    }

    //导入格式
    protected $fillable = ['type','price',"name","remark","supplier",'stock','states'];

    public function organization()
    {
        return $this->belongsToMany(Organization::class,'org_id');
    }
    protected function getUseCountAttribute()
    {
        $id = $this->attributes['id'];
        if(empty($id)) return 0;
        return OrderVaccine::where(['vaccine_id'=>$id])->count();
    }

    public function organizationvaccines(){
        return $this->hasMany(OrganizationVaccines::class,'vaccine_id');
    }
}