zend.di.debugging-and-complex-use-cases.rst

Zend\Di Debugging & Complex Use Cases

Debugging a DiC

It is possible to dump the information contained within both the Definition and InstanceManager for a Di instance.

The easiest way is to do the following:

Zend\Di\Display\Console::export($di);

If you are using a RuntimeDefinition where upon you expect a particular definition to be resolve at the first-call, you can see that information to the console display to force it to read that class:

Zend\Di\Display\Console::export($di, array('A\ClassIWantTo\GetTheDefinitionFor'));

Complex Use Cases

Interface Injection

namespace Foo\Bar {
    class Baz implements BamAwareInterface
    {
        public $bam;

        public function setBam(Bam $bam)
        {
            $this->bam = $bam;
        }
    }
    class Bam
    {
    }
    interface BamAwareInterface
    {
        public function setBam(Bam $bam);
    }
}

namespace {
    include 'zf2bootstrap.php';
    $di = new Zend\Di\Di;
    $baz = $di->get('Foo\Bar\Baz');
}

Setter Injection with Class Definition

namespace Foo\Bar {
    class Baz
    {
        public $bam;

        public function setBam(Bam $bam)
        {
            $this->bam = $bam;
        }
    }
    class Bam {
    }
}

namespace {
    $di = new Zend\Di\Di;
    $di->configure(new Zend\Di\Config(array(
        'definition' => array(
            'class' => array(
                'Foo\Bar\Baz' => array(
                    'setBam' => array('required' => true)
                )
            )
        )
    )));
    $baz = $di->get('Foo\Bar\Baz');
}

Multiple Injections To A Single Injection Point

namespace Application {
    class Page
    {
        public $blocks;

        public function addBlock(Block $block)
        {
            $this->blocks[] = $block;
        }
    }
    interface Block
    {
    }
}

namespace MyModule {
    class BlockOne implements \Application\Block {}
    class BlockTwo implements \Application\Block {}
}

namespace {
    include 'zf2bootstrap.php';
    $di = new Zend\Di\Di;
    $di->configure(new Zend\Di\Config(array(
        'definition' => array(
            'class' => array(
                'Application\Page' => array(
                    'addBlock' => array(
                        'block' => array('type' => 'Application\Block', 'required' => true)
                    )
                )
            )
        ),
        'instance' => array(
            'Application\Page' => array(
                'injections' => array(
                    'MyModule\BlockOne',
                    'MyModule\BlockTwo'
                )
            )
        )
    )));
    $page = $di->get('Application\Page');
}