英文:
How to allow unique Laravel Facade instances when using Builder pattern?
问题
我正在使用建造者模式，但在调用之间出现数据混淆。我希望每次静态调用我的门面时都能获得一个新的实例。示例：
底层类
namespace Me\Package;class PHPFile{public function set($key, $value) {$this->$key = $value;return $this;}public function get($key) {return isset($this->$key) ? $this->$key : 'NO_SUCH_KEY';}public function sum(){// 一个“结束”方法的示例}}
门面
namespace Me\Package\Facades;use Illuminate\Support\Facades\Facade;class PHPFile extends Facade {protected static function getFacadeAccessor() { return 'PHPFile'; }}
服务提供者
use Me\Package\PHPFile;public function register(){App::bind('PHPFile',function() {return new PHPFile;});}
测试
print PHPFile::set('first', 10)->set('second', 20)->sum();// 30print PHPFile::get('first');// 10 !!!
由于门面保持相同的实例，第二个测试行将打印 10。我希望在这里得到 'NO_SUCH_KEY' - 每次静态调用后都获得一个新实例。我该如何做到这一点？我尝试让门面返回一个最小的“工厂”，简单地返回一个新的 PHPFile 实例的构造函数，但没有成功。我还阅读到应该在“结束”方法（sum/get）中调用 new static，但不确定如何做到这一点并保留累积的数据。
英文:
Im using the Builder pattern but get data mixup between calls. I want a fresh instance on each static call to my facade. Example:
Underlying class
<?phpnamespace Me\Package;class PHPFile{public function set($key, $value) {$this->$key = $value;return $this;}public function get($key) {return isset($this->$key) ? $this->key : 'NO_SUCH_KEY';}public function sum(){// example of an "ending" method}}
The facade
<?phpnamespace Me\Package\Facades;use Illuminate\Support\Facades\Facade;class PHPFile extends Facade {protected static function getFacadeAccessor() { return 'PHPFile'; }}
Serviceprovider
use Me\Package\PHPFile;public function register(){App::bind('PHPFile',function() {return new PHPFile;});}
Test
print PHPFile::set('first', 10)->set('second', 20)->sum();// 30print PHPFile::get('first');// 10 !!!
Since facades keep the same instance the second test row will print 10. I want 'NO_SUCH_KEY' here - a new instance after each static call. How can I do that? I tried making the facade return a minimal "factory", simply a constructor returning a new PHPFile instance but did not succeed that way. I also read I should call a new static in the "ending"-methods (sum/get) but not sure how to do that and keep the accumulated data.
答案1
得分: 1
添加一个工厂
这个工厂会拦截任何带有魔术__call方法的调用，然后将其分派给一个新的PHPFile（我的生成器类）
namespace Me\Package\Factories;use Me\Package\PHPFile;class PHPFileFactory{public function __call($method, $args){return (new PHPFile)->$method(...$args);}}
在服务提供者中绑定工厂
App::bind('PHPFile', function() {return new PHPFileFactory;});
感谢 @apokryfos 指出我需要返回其他内容 - 不是生成器本身，而是另一个类。
英文:
Add a factory
This factory will intercept any call with magic __call method, then dispatch it to a fresh PHPFile (My Builder class)
<?phpnamespace Me\Package\Factories;use Me\Package\PHPFile;class PHPFileFactory{public function __call($method, $args){return (new PHPFile)->$method(...$args);}}
Bind the factory in the serviceprovider
App::bind('PHPFile',function() {return new PHPFileFactory;});
Thanks to @apokryfos who pointed out I needed to return something else - not the Builder itself but another class.
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