//查出所有包含了[laravel]这个标签的所有文章
// Post model
class Post extends Eloquent {
public function tags()    {
    return $this->belongsToMany(‘Tag’);
}
}

// Tag model

class Tag extends Eloquent()

{
public function posts()    {
    return $this->belongsToMany(‘Post’);
}
}

// 查询自上周发布以来包含了 laravel 标签的所有文章

$posts = Post::whereHas(‘tags’, function($query)

{

$query->where(‘name’, ‘=’, ‘laravel’);

})->where(‘published_at’, ‘ >= ‘, Carbon\Carbon::now()->subWeek())->get();