本文介绍了Laravel orderBy 关系的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在循环查看特定帖子的作者发布的所有评论.
I am looping over all comments posted by the Author of a particular post.
foreach($post->user->comments as $comment)
{
echo "<li>" . $comment->title . " (" . $comment->post->id . ")</li>";
}
这给了我
I love this post (3)
This is a comment (5)
This is the second Comment (3)
我将如何按 post_id 排序，以便上述列表按 3、3、5 排序
How would I order by the post_id so that the above list is ordered as 3,3,5
推荐答案
可以通过查询函数扩展关系:
It is possible to extend the relation with query functions:
<?php
public function comments()
{
return $this->hasMany('Comment')->orderBy('column');
}
[评论后编辑]
<?php
class User
{
public function comments()
{
return $this->hasMany('Comment');
}
}
class Controller
{
public function index()
{
$column = Input::get('orderBy', 'defaultColumn');
$comments = User::find(1)->comments()->orderBy($column)->get();
// use $comments in the template
}
}
默认用户模型+简单控制器示例；获取评论列表时，只需根据 Input::get() 应用 orderBy().(一定要进行一些输入检查；))
default User model + simple Controller example; when getting the list of comments, just apply the orderBy() based on Input::get(). (be sure to do some input-checking ;) )
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