laravel 拉拉维尔。在有关系的模型中使用 scope()
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Laravel. Use scope() in models with relation
提问by Ilya Vo
I have two related models: Categoryand Post.
我有两个相关的模型：Category和Post.
The Postmodel has a publishedscope (method scopePublished()).
该Post模型有一个published范围（方法scopePublished()）。
When I try to get all categories with that scope:
当我尝试获取该范围内的所有类别时：
$categories = Category::with('posts')->published()->get();
I get an error:
我收到一个错误：
Call to undefined method
published()
调用未定义的方法
published()
Category:
类别：
class Category extends \Eloquent
{
public function posts()
{
return $this->HasMany('Post');
}
}
Post:
邮政：
class Post extends \Eloquent
{
public function category()
{
return $this->belongsTo('Category');
}
public function scopePublished($query)
{
return $query->where('published', 1);
}
}
回答by Jarek Tkaczyk
You can do it inline:
您可以内联进行：
$categories = Category::with(['posts' => function ($q) {
$q->published();
}])->get();
You can also define a relation:
您还可以定义一个关系：
public function postsPublished()
{
return $this->hasMany('Post')->published();
// or this way:
// return $this->posts()->published();
}
and then:
进而：
//all posts
$category->posts;
// published only
$category->postsPublished;
// eager loading
$categories->with('postsPublished')->get();
