How to pass parameter via dependency injection

[Sebastian222]

Hello, I would like to know if there is possible to inject string or number as parameter to class, for example I have some class with constructor:

    public function __construct(
        \Magento\Framework\App\State $state,
        \Magento\Store\Model\App\Emulation $emulation,
        \Magento\Framework\ObjectManagerInterface $objectManager,
        int $someIntegerValue
    ){
        $this->state = $state;
        $this->emulation = $emulation;
        $this->objectManager = $objectManager;
    }

I don't know, how can I pass integer value to this. Is it possible? 

Thanks,

Sebastian

[johnwebdes40a5]

Hello @Sebastian222 

Yes, in Magento 2, you can inject string or number parameters into a class constructor.

Here's an example of how you can define a class with string and number parameters in its constructor:

public function __construct(
        \Magento\Framework\App\State $state,
        \Magento\Store\Model\App\Emulation $emulation,
        \Magento\Framework\ObjectManagerInterface $objectManager,
       int $someIntegerValue
    ){
        $this->state = $state;
        $this->emulation = $emulation;
        $this->objectManager = $objectManager;
        $this->numberParam = $someIntegerValue;    }

Hope it helps !

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[Sanjay Jethva]

@Sebastian222 

Hey,

You can add class arguments by adding dependencies in di.xml file. e.g.,

<type name="Vendor\Extension\Model\Class1">
    <arguments>
        <argument name="arg1" xsi:type="object">Vendor\Extension\Model\Class2</argument>
        <argument name="arg2" xsi:type="string">testArgument</argument>
      ...
    </arguments>
</type>

[Milople]

Hello @Sebastian222,

In Magento 2, passing scalar values (like integers or strings) directly via dependency injection is not straightforward because the DI configuration primarily supports objects and not scalar values. However, you can achieve this by using a combination of the DI configuration and a custom configuration provider to pass the scalar values.

here is the demo code to achieve this :

Create a configuration provider class that will hold your integer value.

Example: Configuration Provider Class

namespace Vendor\Module\Model;
class ConfigProvider
{
    private $someIntegerValue;
    public function __construct(int $someIntegerValue)
    {
        $this->someIntegerValue = $someIntegerValue;
    }

    public function getSomeIntegerValue(): int
    {
        return $this->someIntegerValue;
     }

}

Configure the Value in di.xml

In your module's di.xml file, configure the ConfigProvider class and pass the integer value as an argument.

Example: di.xml

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">

    <type name="Vendor\Module\Model\ConfigProvider">

        <arguments>

            <argument name="someIntegerValue" xsi:type="number">123</argument>

        </arguments>

    </type>

</config>

Inject the Configuration Provider into Your Class

Update your class to accept the ConfigProvider instance and use it to get the integer value.

Example: Updated Class:

namespace Vendor\Module\Model;
class YourClass
{
    private $state;
    private $emulation;
    private $objectManager;
    private $someIntegerValue;

    public function __construct(

        \Magento\Framework\App\State $state,
        \Magento\Store\Model\App\Emulation $emulation,
        \Magento\Framework\ObjectManagerInterface $objectManager,
        ConfigProvider $configProvider
    ){

        $this->state = $state;
        $this->emulation = $emulation;
        $this->objectManager = $objectManager;
        $this->someIntegerValue = $configProvider->getSomeIntegerValue();

    }
    // Other methods...
}

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