Finding out what changed via postUpdate listener in Symfony 2.1

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萌比男神i
萌比男神i 2021-02-20 18:14

I have a postUpdate listener and I\'d like to know what the values were prior to the update and what the values for the DB entry were after the update. Is there a way to do this

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  • 2021-02-20 18:46

    You can find example in doctrine documentation.

    class NeverAliceOnlyBobListener
    {
        public function preUpdate(PreUpdateEventArgs $eventArgs)
        {
            if ($eventArgs->getEntity() instanceof User) {
                if ($eventArgs->hasChangedField('name') && $eventArgs->getNewValue('name') == 'Alice') {
                    $eventArgs->setNewValue('name', 'Bob');
                }
            }
        }
    }
    
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  • 2021-02-20 18:53

    You can use this ansfer Symfony2 - Doctrine - no changeset in post update

    /**
     * @param LifecycleEventArgs $args
     */
    public function postUpdate(LifecycleEventArgs $args)
    {
        $changeArray = $args->getEntityManager()->getUnitOfWork()->getEntityChangeSet($args->getObject());
    }
    
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  • 2021-02-20 18:57

    Your Entitiy:

    /**
     * Order
     *
     * @ORM\Table(name="order")
     * @ORM\Entity()
     * @ORM\EntityListeners(
     *     {"\EventListeners\OrderListener"}
     * )
     */
    class Order
    {
    ...
    

    Your listener:

    class OrderListener
    {
        protected $needsFlush = false;
        protected $fields = false;
    
        public function preUpdate($entity, LifecycleEventArgs $eventArgs)
        {
            if (!$this->isCorrectObject($entity)) {
                return null;
            }
    
            return $this->setFields($entity, $eventArgs);
        }
    
    
        public function postUpdate($entity, LifecycleEventArgs $eventArgs)
        {
            if (!$this->isCorrectObject($entity)) {
                return null;
            }
    
            foreach ($this->fields as $field => $detail) {
                echo $field. ' was  ' . $detail[0]
                           . ' and is now ' . $detail[1];
    
                //this is where you would save something
            }
    
            $eventArgs->getEntityManager()->flush();
    
            return true;
        }
    
        public function setFields($entity, LifecycleEventArgs $eventArgs)
        {
            $this->fields = array_diff_key(
                $eventArgs->getEntityChangeSet(),
                [ 'modified'=>0 ]
            );
    
            return true;
        }
    
        public function isCorrectObject($entity)
        {
            return $entity instanceof Order;
        }
    }
    
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  • 2021-02-20 19:09

    Found the solution here. What I needed was actually part of preUpdate(). I needed to call getEntityChangeSet() on the LifecycleEventArgs.

    My code:

    public function preUpdate(Event\LifecycleEventArgs $eventArgs)
    {   
        $changeArray = $eventArgs->getEntityChangeSet();
    
        //do stuff with the change array
    
    }
    
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