<?php namespace app\model; class Business extends Base { const state_reviewing = 0; const state_on = 1; const state_off = 2; public function category() { return $this->hasOne(Category::class, 'id',"type"); } public function account() { return $this->hasOne(Account::class, 'business_code',"code"); } public function agency() { return $this->hasOne(self::class,"code","agency_code"); } }