Magento – Magento 2 . Model factory create fails

dependency-injectionfactorymagento2model

These are my php files.
magento\app\code\Cosmo\Basemodule\Model\DatiInterface.php

<?php
namespace Cosmo\Basemodule\Model;
interface DatiInterface
{

}

magento\app\code\Cosmo\Basemodule\Model\Dati.php

namespace Cosmo\Basemodule\Model;

use Magento\Framework\Model\AbstractModel;
use Magento\Framework\DataObject\IdentityInterface;
class Dati extends AbstractModel implements DatiInterface, IdentityInterface
{
    protected function _construct()
    {
        $this->_init('Cosmo\Basemodule\Model\ResourceModel\Dati');
    }

    public function getIdentities()
    {
       //todo
    }
}

magento\app\code\Cosmo\Basemodule\Model\ResourceModel\Dati.php

<?php
namespace Cosmo\Basemodule\Model\ResourceModel;
use Magento\Framework\Model\ResourceModel\Db\AbstractDb;

class News extends AbstractDb
{
    /**
     * Define main table
     */
    protected function _construct()
    {
        $this->_init('exampletable', 'entity_id');
    }
}

magento\app\code\Cosmo\Basemodule\Model\ResourceModel\Dati\Collection.php

<?php
namespace Cosmo\Basemodule\Model\ResourceModel\Dati;
use Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection;

class Collection extends AbstractCollection
{
    /**
     * Define model & resource model
     */
    protected function _construct()
    {
        $this->_init(
            'Cosmo\Basemodule\Model\Dati',
            'Cosmo\Basemodule\Model\ResourceModel\Dati'
        );
    }
}

And then block where i inject the factory
magento\app\code\Cosmo\Basemodule\Block\Main.php

 <?php
 namespace Cosmo\Basemodule\Block;

 use Magento\Framework\View\Element\Template\Context;
 use Cosmo\Basemodule\Model\DatiFactory;

 class Main extends \Magento\Framework\View\Element\Template
 {
    protected $_datiFactory;

    public  function __construct(Context $context, DatiFactory $datiFactory)
    {
        parent::__construct($context);
        $this->_datiFactory = $datiFactory;
    }

    public function _prepareLayout()
    {
        echo 'pippo<br \>';
        $dati = $this->_datiFactory->create();
        var_dump($dati->getCollection());
        exit();
    }
}

I tried in many ways but create() fails and then nothing is executed.

Best Answer

you clearly missed the interface for model

Cosmo\Basemodule\Model\DatiInterface.php

  <?php
    namespace Cosmo\Basemodule\Model;
    interface DatiInterface 
    {

    }

and your model will be

magento\app\code\Cosmo\Basemodule\Model\Dati.php

namespace Cosmo\Basemodule\Model;

use Magento\Framework\Model\AbstractModel;

class Dati extends AbstractModel implements DatiInterface, \Magento\Framework\DataObject\IdentityInterface
{
    /**
     * Define resource model
     */
    protected function _construct()
    {
    $this->_init('Cosmo\Basemodule\Model\ResourceModel\Dati');
    }
}

Related Solutions

Call Model Method from Controller in Magento 2

The object manager is not the correct way to do this. Use dependency injection via the constructor whenever possible.

You are getting that error because your controller extends another class, but you are not following the parent class's constructor, or you did not clear the cache.

You have not provided your code, but I assume your controller extends \Magento\Framework\App\Action\Action. If you open that, you'll see the constructor signature for that class is:

/**
 * @param \Magento\Framework\App\Action\Context $context
 */
public function __construct(
    \Magento\Framework\App\Action\Context $context
) {
    // ...
}

You're getting the error because Magento is trying to inject a Context object, and you're asking for a Customer. To inject your model, your class constructor needs to look like this:

protected $customer;

/**
 * @param \Magento\Framework\App\Action\Context $context
 * @param \Demo\HelloWorld\Model\Customer $customer
 */
public function __construct(
    \Magento\Framework\App\Action\Context $context,
    \Demo\HelloWorld\Model\Customer $customer
) {
    $this->customer = $customer;

    parent::__construct($context);
}

Make that change, then flush the Magento cache (or folder var/cache), and then it should work.

Note: This is assuming your Customer class is injectable. If it's loaded from the database, you need to inject CustomerFactory instead, and then call $customer = $this->customerFactory->create().

How to Create Model Factory for Custom Module in Magento 2

The problem that I see with your code is that in your call to parent::__construct, you are missing the $data = [] argument. Try changing your code to this:

class Main extends \Magento\Framework\View\Element\Template
{
    protected $_datiFactory;

    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        DatiFactory $datiFactory,
        array $data = []
    )
    {
        parent::__construct($context, $data);
        $this->_datiFactory = $datiFactory;
    }
}

After you have made that change, clear your var/generation and var/di directories.

Even though $data is an optional argument, it still need to be included in your arguments for your constructor for proper creation of the interceptor class.

Additionally, have you created the class Cosmo\Basemodule\Model\ResourceModel\Dati? I don't see it in the various blocks of code that you posted. If you forgot to create that class, that will also be a problem.

Best Answer

Related Solutions

Call Model Method from Controller in Magento 2

How to Create Model Factory for Custom Module in Magento 2

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