I'm reading the Symfony 2 tutorials. The early tutorials make it clear to me that:
* Bundles are great * The ability to call actions from other actions is a big improvement on actions + components + partials + ... * Twig fills the remaining roles of the old Symfony view/controller concepts by providing blocks (which act like Symfony 1.x slots) and as many layers of 'layouts' as you want (the 'extends' mechanism) No questions here, just a lot of applause. Now I'm reading about Doctrine and forms. This part is a little puzzling. I get that: * Annotations are a cool way to define columns * You can generate entity classes or just write them * Doctrine 2 is much faster * The "do a bunch of stuff then call flush()" pattern is a big part of the reason why and very efficient But this tutorial on Doctrine and forms is less clear: http://docs.symfony-reloaded.org/guides/doctrine/orm/form.html The tutorial says that EntityToIDTransformer makes it easier to move back and forth between an entity and an ID, and that this allows you to select many-to-one or one-to-one entities in choice fields. But it never actually demonstrates that. The code gets the ids and names manually: $userChoices = array(); $users = $em->getRepository('User')->findAll(); foreach ($users AS $user) { $userChoices[$user->id] = $user->name; } Then it sets up a field in a form: $userTransformer = new EntityToIDTransformer(array( 'em' => $em, 'className' => 'User', )); $engineerField = new ChoiceField('engineer', array( 'choices' => $userChoices, )); $engineerField->setValueTransformer($userTransformer); $form->add($engineerField); ... And that's all it shows. My question: what does this transformer actually do for me? It seems to me that I could write this exact code, minus the transformer part, and it would still work. I suspect the answer is that later I'll be able to get the engineer value from the form and discover I've received an object, not just an ID, but this is never mentioned or demonstrated. -- Tom Boutell P'unk Avenue 215 755 1330 punkave.com window.punkave.com -- If you want to report a vulnerability issue on symfony, please send it to security at symfony-project.com You received this message because you are subscribed to the Google Groups "symfony users" group. To post to this group, send email to symfony-users@googlegroups.com To unsubscribe from this group, send email to symfony-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/symfony-users?hl=en
