假设我有'Post'型号和'Comment'型号 . A 'Post' can have multiple 'Comments' .
假设， I allow user to add/edit/delete multiple comments & 'submit' in a single form .
现在，当用户提交所有评论时，其中一些可能已被编辑，有些则没有，有些可能已删除，有些已添加 . 在这种情况下，我目前所做的是 - 'delete all the existing comments for that post & add all the submitted comments (no matter if they were edited/added) again' .
这导致我进入 problem - The autoincrement 'id' field of the 'comments' table started taking big values (even when the total number of comments is not equal to its value).
Solution I see is - Update the existing comments first & add more comments if they are actually added.
所以我的问题是 - 在这种情况下，laravel中有没有办法更新？对于前者 -
$post->comments()->update(array($comment1,$comment2));
哪里
$comment1 = array('comment_heading' => 'new/edited heading for comment',
'comment_content' => 'some new/edited content for comment');
其中'comment_heading'，'comment_content'是'comment'表的列 .
此外，本案例讨论了'oneToMany'的关系，但对'ManyToMany'关系的额外解决方案将不胜感激 .