如何編寫在Symfony2中共享函數的多個實體類

Question

我有多個附有某種文件的實體。我遵循食譜條目如何處理文件上傳與教條（here），但我的問題是這樣的：

我怎樣才能做到這一點，而不重複大量的代碼？現在我的所有實體都共享與獲取路徑相關的功能，儘管在這裏和那裏進行了一些修改，所以它們不完全相同，但大部分代碼都是。這樣做的最乾淨的方式是什麼？

這裏是兩個實體的一個例子，通知重疊功能：

圖片：

public function preUpload() 
{ 
    if (null === $this->file) { 
     return; 
    } 

    $dir = $this->getUploadRootDir().'/'.$this->getParentDir(); 

    if (!is_dir($dir)) { 
     mkdir($dir); 
    } 

    $slugger = new \Sam\TourBundle\Service\SlugService(); 

    $pathinfo = pathinfo($this->file->getClientOriginalName()); 
    $path = $slugger->slugize($pathinfo['filename']).'.'.$pathinfo['extension']; 
    $this->path = $path; 

    // If file already exists rename it 
    if (file_exists($this->getAbsolutePath())) { 
     $i = 1; 
     while (file_exists($this->getAbsolutePath())) { 
      $this->path = $i.'-'.$this->path; 
      $i++; 
     } 
    } 

} 

/** 
* @ORM\PostPersist() 
* @ORM\PostUpdate() 
*/ 
public function upload() 
{ 
    // the file property can be empty if the field is not required 
    if (null === $this->file) { 
     return; 
    } 

    $dir = $this->getUploadRootDir().'/'.$this->getParentDir(); 
    $this->file->move($dir, $this->path); 

    $thumb = new \Sam\TourBundle\Service\ThumbnailService(); 
    $thumb->makeThumbnail($this->getAbsolutePath()); 

    unset($this->file); 
} 

/** 
* @ORM\PostRemove() 
*/ 
public function removeUpload() 
{ 
    $file = $this->getAbsolutePath(); 
    $thumb_file = $this->getThumbnailAbsolutePath(); 

    if (file_exists($file)) { 
     unlink($file); 
    } 

    if (file_exists($thumb_file)) { 
     unlink($thumb_file); 
    } 
} 

public function getParentDir() 
{ 
    return $galerija = $this->getGalerija()->getSlug().'/'; 
    //return null === $galerija ? null : $this->getUploadRootDir().'/'.$galerija.$this->path; 
} 

public function getAbsolutePath() 
{ 
    return null === $this->path ? null : $this->getUploadRootDir().'/'.$this->getParentDir().$this->path; 
} 

public function getThumbnailAbsolutePath() 
{ 
    $pathinfo = pathinfo($this->getAbsolutePath()); 
    $thumbpath = $pathinfo['dirname'].'/'.$pathinfo['filename'].'_thumb.'.$pathinfo['extension']; 
    return null === $this->path ? null : $thumbpath; 
} 

public function getRootDir() 
{ 
    return __DIR__; 
} 

public function getWebPath() 
{ 
    return null === $this->path ? null : $this->getUploadDir().'/'.$this->getParentDir().$this->path; 
} 

public function getThumbnailWebPath() 
{ 
    $pathinfo = pathinfo($this->getAbsolutePath()); 
    $thumbpath = $pathinfo['filename'].'_thumb.'.$pathinfo['extension']; 
    return null === $this->path ? null : $this->getUploadDir().'/'.$this->getParentDir().$thumbpath; 
} 

protected function getUploadRootDir() 
{ 
    // the absolute directory path where uploaded documents should be saved 
    return realpath(__DIR__.'/../../../../web/'.$this->getUploadDir()); 
} 

protected function getUploadDir() 
{ 
    // get rid of the __DIR__ so it doesn't screw when displaying uploaded doc/image in the view 
    return 'images'; 
} 

文獻：

public function preUpload() 
{ 
    if (null === $this->file) { 
     return; 
    } 

    $dir = $this->getUploadRootDir().'/'.$this->getParentDir(); 

    if (!is_dir($dir)) { 
     mkdir($dir); 
    } 

    $slugger = new \Sam\TourBundle\Service\SlugService(); 

    $pathinfo = pathinfo($this->file->getClientOriginalName()); 
    $path = $slugger->slugize($pathinfo['filename']).'.'.$pathinfo['extension']; 
    $this->path = $path; 

    // If file already exists rename it 
    if (file_exists($this->getAbsolutePath())) { 
     $i = 1; 
     while (file_exists($this->getAbsolutePath())) { 
      $this->path = $i.'-'.$this->path; 
      $i++; 
     } 
    } 

} 

/** 
* @ORM\PostPersist() 
* @ORM\PostUpdate() 
*/ 
public function upload() 
{ 
    // the file property can be empty if the field is not required 
    if (null === $this->file) { 
     return; 
    } 

    $dir = $this->getUploadRootDir().'/'.$this->getParentDir(); 
    $this->file->move($dir, $this->path); 

    unset($this->file); 
} 

/** 
* @ORM\PostRemove() 
*/ 
public function removeUpload() 
{ 
    $file = $this->getAbsolutePath(); 

    if (file_exists($file)) { 
     unlink($file); 
    } 
} 

public function getParentDir() 
{ 
    return $ponuda = $this->getPonuda()->getSlug().'/'; 
} 

public function getAbsolutePath() 
{ 
    return null === $this->path ? null : $this->getUploadRootDir().'/'.$this->getParentDir().$this->path; 
} 

public function getRootDir() 
{ 
    return __DIR__; 
} 

public function getWebPath() 
{ 
    return null === $this->path ? null : $this->getUploadDir().'/'.$this->getParentDir().$this->path; 
} 

protected function getUploadRootDir() 
{ 
    // the absolute directory path where uploaded documents should be saved 
    return realpath(__DIR__.'/../../../../web/'.$this->getUploadDir()); 
} 

protected function getUploadDir() 
{ 
    // get rid of the __DIR__ so it doesn't screw when displaying uploaded doc/image in the view 
    return 'documents'; 
} 

Answer 1

我個人創建的上傳服務類的方法，該方法你可以通過這些實體，你可以在任何需要的地方注入這個服務，並且只將它寫在一個地方。 在我相信的實體中擁有這種邏輯通常不是一個好主意。

從我的角度來看，這種情況下的繼承看起來完全不正確，因爲它是一種添加行爲而不是泛化的方式，您可以這樣做，但我會建議您採用這種方式。繼承本身被過度使用，而不是最乾淨的工作方式，而教條的實施也相當煩人。性格可以做到，儘管在這種環境下我還沒有很多經驗。 我強烈建議使用Symfony的方式使用服務。