Symfony2: How to create event listener thru entity annotations?

Question

I would like to have custom annotations on my entity that will do something on persist event, but defined thru annotations. An example:

/**
* @ORM\Entity
* @Searchable("column"="title")
*/
class Product
{

}

That @Searchable annotation should somehow trigger my code that will read column title, separate words and save into its own table (much simplified example of what I really need).

I am aware I can use doctrine listeners and register them in config.yml but I really need this to be done thru entity annotations so that searchable bundle could be easily reused thru different projects. I read tons of docs, even tried to understand Gedmo behaviours bundle code but I failed. Can somehow show me how to do this, in an idiot-proof way?

I even read http://php-and-symfony.matthiasnoback.nl/2011/12/symfony2-doctrine-common-creating-powerful-annotations/ but that was kinda too complicated.

Florian Klein · Accepted Answer · 2013-07-03 11:58:00Z

1

The link you gave is a perfect example of how you should do it. How much more complicated do you think it would be with a custom hand crafted solution?

Still, you could try to:

create a doctrine listener that listens on prePersist:
in this listener, use annotation driver/reader to read your annotation
do some crazy stuff with these informations

answered Jul 3, 2013 at 11:58

Florian Klein

8,9351 gold badge34 silver badges43 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

Zeljko Over a year ago

That example doesn't explain how to trigger it on postPersist event. Gedmo/Timestampable behaviour does that but the code is kinda confusing for me.

Florian Klein Over a year ago

it uses doctrine subscribers/listeners (see my link #1)

Florian Klein Over a year ago

this listener could be a service that have access to annotation reader (injected in ctor for example).

Zeljko Over a year ago

Ok, the idea is: I create a bundle with postPersist listener (I already know them). In that method, I should put the code that will check annotations of the entity that is persisted and do something with that? The question is: that would be triggered for every entity that is persisted. Isn't it kinda slow? I only want that to be triggered on entities that have my annotation. Is it even possible?

Florian Klein Over a year ago

In theory, the annotations are cached if you use the correct preconfigured annotation reader. And no, it's not possible to listen only on some entities. You have to do that check at runtime. What can be cached thus, is that an entity should be processed or not by caching the annotation somewhere. But as I said, it should already be done by the annotation reader.

Collectives™ on Stack Overflow

Symfony2: How to create event listener thru entity annotations?

1 Answer 1

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related