这样写没有问题：
$article = ArticleModel::get(1, 'commentsA');
$article->together('comments_a')->delete();这样不行：$article = ArticleModel::get(1, 'commentsA');
$article->together('commentsA')->delete(); 最佳答案
这样写没有问题：
$article = ArticleModel::get(1, 'commentsA');
$article->together('comments_a')->delete();这样不行：$article = ArticleModel::get(1, 'commentsA');
$article->together('commentsA')->delete();