不确定这是否可行。我可以对当前表格中的所有内容(标题,正文等)进行排序,但还没有想到将其排序到与之相关的表格中。我想根据他/她拥有DESC,ASC的歌曲总数来对艺术家进行排序。
如何动态排序艺术家的歌曲总数?
管理员/艺术家sortby =歌曲&安培;为了= ASC
我的桌子
艺术家:id,name,body,slug
歌曲:id,title,body,slug,hits,artist_id
在此之前我在控制器中使用了eager loading,Artist :: with('songs)... 然后在我可以在foreach循环中使用的视图中,对总歌曲进行计数($ artist->歌曲)。然后我找到了一种更清洁的方式 http://laravel.io/forum/05-03-2014-eloquent-get-count-relation
艺术家模特
public function songs()
{
return $this->hasMany('Song');
}
public function songsCountRelation()
{
return $this->hasOne('Song')->selectRaw('artist_id, count("id") as count')->groupBy('artist_id');
}
public function getSongsCountAttribute()
{
return $this->songsCountRelation->count;
}
歌曲模型
public function artist()
{
return $this->belongsTo('Artist');
}
控制器
public function index()
{
// Sortby and order variables from url
$this->data['sortby'] = Input::get('sortby');
$this->data['order'] = Input::get('order');
// If the sortby and order exists in url, fetch the data and order it accordingly
if ($this->data['sortby'] && $this->data['order'])
{
// Order the data based on keys from url
$this->data['artists'] = Artist::with('songsCountRelation')->orderBy($this->data['sortby'], $this->data['order'])->get(['id', 'name', 'body', 'slug']);
}
else
{
$this->data['artists'] = Artist::with('songsCountRelation')->get(['id', 'name', 'body', 'slug']);
}
$this->layout->content = View::make('admin.artists.index', $this->data);
}
索引视图
<th>
{{--Sort by slug--}}
@if ($sortby == 'slug' && $order == 'asc')
{{ link_to_route('admin.artists.index', 'Slug', ['sortby' => 'slug', 'order' => 'desc']) }}
@else
{{ link_to_route('admin.artists.index', 'Slug', ['sortby' => 'slug', 'order' => 'asc']) }}
@endif
</th>
<th>
{{--Sort by total songs--}}
@if ($sortby == 'songs' && $order == 'asc')
{{ link_to_route('admin.artists.index', 'Songs', ['sortby' => 'songs', 'order' => 'desc']) }}
@else
{{ link_to_route('admin.artists.index', 'Songs', ['sortby' => 'songs', 'order' => 'asc']) }}
@endif
</th>
...¨
@foreach($artists as $artist)
<tr>
...
<td>{{ $artist->songsCount; }}</td>
...
</tr>
@endforeach
提前致谢!
答案 0 :(得分:0)
你必须加入这些表格。
Artist::join('songs', ...)
->orderByRaw('count(songs.*) asc')
->select('artists.*')
->get();