thinkphp中的关联查询使用代码片段

        $res1 = ArticleAlpha::whereIn('status',['-1','-2'])->alias('a')->field('b.*')
            ->join('article_beta b','a.id = b.article_alpha_id and b.visible != -1')
            ->where('b.id',6)->find();



        $res2 = \app\model\ArticleBeta::alias('b')->field('b.*')
            ->join('article_alpha a','b.article_alpha_id = a.id and b.visible != -1')
            ->select();