How to add a product with two line items

Question

I want to add a product with two line items.
Say for example if i add Product A with qty of 4.
I need to split cart into two line items.
3 qty as one line item and 1 is in another.

How Can I achieve this?

I have overridden Checkout/Controller/Cart/Add.php

and here is my sample code.

foreach ([3,1] as $qty) {
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $_control = $objectManager->create('\Vendor\Module\Observer\Custom');
    $additionalOptions = [];
    if($value == 1){
        $additionalOptions[] = array(
            'label' => 'Discount',
            'value' => 'No'
        );
    }else{
        $additionalOptions[] = array(
            'label' => 'Discount',
            'value' => 'Yes'
        );
    }
    $product->addCustomOption('additional_options',$_control->unserializeCustomOption($additionalOptions));
    $v_params = array(
        'product' => $product->getId(),
        'qty' => $qty,
        'price' => ($qty == 3 ? 76 : 86)
    );
    $this->cart->addProduct($product, $v_params);
}

Request which is coming to Quote model is correct only.

{"product":"727","qty":3,"price":76}
{"product":"727","qty":1,"price":86}

But in the cart its not correct.

Thanks in advance!

Answer 1

You can achieve this via beforeAddProduct plugin of Magento\Quote\Model\Quote where you can assign addCustomOption to $product->addCustomOption('additional_options', $additionalInfo); where $additionalInfo is array like below

$additionalInfo[] = [
 'label' => 'Label you want to show',
 'value' => 'Value you want to show'
];  

on product add time check qty is greater than 3. then you can create new product with custom option so it will work as you want.