laravel 理解laravel模型中的静态方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/41143620/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Understanding static method in laravel Model
提问by Alexander Solonik
I was just going through a laravel tutrorial online and i saw the following modal coded as below:
我刚刚在网上浏览了 laravel 教程，我看到了以下编码如下的模式：
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Notice extends Model {
protected $fillable = [
'provider_id',
'infringing_title',
'infringing_link',
'original_link',
'original_description',
'template',
'content_removed'
];
public static function open(array $attributes) {
return new static($attributes);
}
public function useTemplate($template) {
$this->template = $template;
}
}
What i am interested to know is what exactly is the use of the below method that is defined:
我有兴趣知道以下定义的方法的用途究竟是什么：
public static function open(array $attributes) {
return new static($attributes);
}
I realize its a static method , but this line return new static($attributes);particularly confuses me.
我意识到它是一个静态方法，但这一行return new static($attributes);让我特别困惑。
I see the method being used in the following way:
我看到以以下方式使用的方法：
$notice = Notice::open($date);
But i still don't quite understand its usage . can somebody explain .
但是我还是不太明白它的用法。有人可以解释一下。
回答by Sherif
static method can be used without instantiating the class thus the ::
可以在不实例化类的情况下使用静态方法，因此 ::
return new static($attributes);makes a new model object from that class
return new static($attributes);从该类创建一个新的模型对象
which is basically the same as
这基本上与
$notice = new Notice;
$notice->provider_id = $provider_id;
...
all you need to do with the object insatance is call $notice->save()
你需要对对象实例做的就是调用 $notice->save()
回答by Kamil Latosinski
In this case it is just a syntactic sugar. Someone doesn't seem to like the newkeyword and prefers a more semantic way to instantiate a new notice class, so it reads better.
在这种情况下，它只是一个语法糖。有人似乎不喜欢这个new关键字，而是更喜欢用更语义化的方式来实例化一个新的通知类，所以它读起来更好。
It also leaves you the doors open for some future logic around instantiating new notice.
它还为您打开了未来关于实例化新通知的逻辑的大门。
Btw. it is model, not modal.
顺便提一句。它是模型el，而不是 mod al。
