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by Jeroen
06:20
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TaggingBundle/EventListener/CloneListener.php (1 issue)

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Code
1 
<?php
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namespace Kunstmaan\TaggingBundle\EventListener;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Doctrine\ORM\EntityManager;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use DoctrineExtensions\Taggable\Taggable;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use Kunstmaan\AdminBundle\Event\DeepCloneAndSaveEvent;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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/**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * This listener will make sure the tags are copied as well

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class CloneListener

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    protected $em;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function __construct(EntityManager $em)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->em = $em;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     * @param DeepCloneAndSaveEvent $event

            


            
                                                                                                            
                            
            
                                    
            
            

                
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     */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function postDeepCloneAndSave(DeepCloneAndSaveEvent $event)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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        $originalEntity = $event->getEntity();

            


            
                                                        
            
                                    
            
            

                
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        if ($originalEntity instanceof Taggable) {

            


            
                                                        
            
                                    
            
            

                
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            $targetEntity = $event->getClonedEntity();

            


            
                                                        
            
                                    
            
            

                
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            $this->em->getRepository('KunstmaanTaggingBundle:Tag')->copyTags($originalEntity, $targetEntity);

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
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            Bug
    
    
    
        introduced 
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It seems like you code against a concrete implementation and not the interface Doctrine\Persistence\ObjectRepository as the method copyTags() does only exist in the following implementations of said interface: Kunstmaan\TaggingBundle\Repository\TagRepository.
                                                                                                                                                                                                        

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
Let’s take a look at an example:


interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}





In the above example, the authenticate() method works fine as long as you just pass
instances of MyUser. However, if you now also want to pass a different implementation
of User which does not have a getDisplayName() method, the code will break.




Available Fixes


  1. Change the type-hint for the parameter:
    

    class AuthSystem
{
    public function authenticate(MyUser $user) { /* ... */ }
}

    

    

    2. 

  2. Add an additional type-check:
    

    class AuthSystem
{
    public function authenticate(User $user)
    {
        if ($user instanceof MyUser) {
            $this->logger->info(/** ... */);
        }

        // or alternatively
        if ( ! $user instanceof MyUser) {
            throw new \LogicException(
                '$user must be an instance of MyUser, '
               .'other instances are not supported.'
            );
        }

    }
}

    

    

    3. 




 Note: PHP Analyzer uses reverse abstract interpretation to narrow down the types
inside the if block in such a case.


  1. Add the method to the interface:
    

    interface User
{
    /** @return string */
    public function getPassword();

    /** @return string */
    public function getDisplayName();
}

    

    

    2. 



                        

                                                    

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    }

            


            
                                                        
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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