CODEWITHSUNDEEP
phpvariableszend-framework2protected
Patrioticcow
Patrioticcow

Reputation: 27048

how to pass protected variables to the table model (or mapper) in Zend Framework 2?

I'm following the tutorial from zf2 website and at one point they create some properties:

namespace Album\Model;

class Album
{
    public $id;
    public $artist;
    public $title;

    public function exchangeArray($data)
    {
        $this->id     = (isset($data['id'])) ? $data['id'] : null;
        $this->artist = (isset($data['artist'])) ? $data['artist'] : null;
        $this->title  = (isset($data['title'])) ? $data['title'] : null;
    }
}

they are public and if i make them protected then when i use them in my query i get an error saying that i can access them:

cannot access protected property Album\Model\Album::$artist

How can i keep them protected and access them in the Model Table (or Mapper)?

Any ideas?

Upvotes: 0

Views: 1630

Answers (3)

vascowhite
vascowhite

Reputation: 18440

You need to modify the code to use setters and getters, which is good practice anyway:-

namespace Album\Model;

class Album
{
    protected $id;
    protected $artist;
    protected $title;

    public function exchangeArray($data)
    {
        $this->id     = (isset($data['id'])) ? $data['id'] : null;
        $this->artist = (isset($data['artist'])) ? $data['artist'] : null;
        $this->title  = (isset($data['title'])) ? $data['title'] : null;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function getId()
    {
        return $this->id;
    }
    //You get the idea for the rest, I'm sure
}

Then to access those properties:-

$album = new Album();
$album->setId(123);

$albumId = $album->getId();

Upvotes: 1

RockyFord
RockyFord

Reputation: 8519

I believe this tutorial leaves these properties as public so they can avoid implementing the magic methods __set() and __get(). Typically used in conjunction with mutators and accessors (setter and getter methods) to access protected and private properties in a class.

For Example:

/**
 * Map the setting of non-existing fields to a mutator when
 * possible, otherwise use the matching field
 * 
 *  $object->property = $value; will work the same as
 *  $object->setProperty($value);
 */
public function __set($name, $value)
    {

        $property = strtolower($name);

        if (!property_exists($this, $property)) {
            throw new \InvalidArgumentException("Setting the property '$property'
                    is not valid for this entity");
        }
        $mutator = 'set' . ucfirst(strtolower($name));

        if (method_exists($this, $mutator) && is_callable(array($this, $mutator))) {
            $this->$mutator($value);
        } else {
            $this->$property = $value;
        }


        return $this;
    }

The __get() would be similar but reversed.

Upvotes: 0

GeeH
GeeH

Reputation: 563

Add getters:

public function getId()
{
    return $this->Id;
}

Upvotes: 0

Related Questions