Add shipping method programmaticaly

Question

I'm creating quote / order programmaticaly. But when I do this, I have an exception : (in english, "select shipping method")

Magento\Framework\Exception\LocalizedException: Sélectionnez un mode de livraison.

However, on my localhost, I can create quote / order. See my code :

$quote=$this->quote->create(); //Create object of quote
        $quote->setStore($store); //set store for which you create quote
        $customer= $this->customerRepository->getById($customer->getEntityId());
        $quote->setCurrency();
        $quote->assignCustomer($customer); //Assign quote to customer

        //add items in quote
        foreach($orderData['items'] as $item){
            $product = $this->getProduct($item['product_id']);
//            $product->setPrice($item['price']);
            $product->setPrice(0);
            $quote->addProduct(
                $product,
                intval($item['qty'])
            );
        }

        //Set Address to quote
        $quote->getBillingAddress()->addData($orderData['shipping_address']);
        $quote->getShippingAddress()->addData($orderData['shipping_address']);

        // Collect Rates and Set Shipping & Payment Method

        $shippingAddress=$quote->getShippingAddress();
        //set shipping method is not working
        $shippingAddress->setCollectShippingRates(true)
                        ->collectShippingRates()
                        ->setShippingMethod('freeshipping_freeshipping'); //shipping method
        $quote->setPaymentMethod('checkmo'); //payment method
        $quote->setInventoryProcessed(false); //not effetc inventory

            $this->quoteRepository->save($quote);
//        $quote->save(); //Now Save quote and your quote is ready

            // Set Sales Order Payment
            $quote->getPayment()->importData(['method' => 'checkmo']);

            // Collect Totals & Save Quote
            $quote->collectTotals();

            $this->quoteRepository->save($quote);

            // Create Order From Quote (exception here)
            $order = $this->quoteManagement->submit($quote);

Answer 1

    Need to add following dependency in constructor:

\Magento\Quote\Model\Quote\Address\Rate $shippingRate

and then use the following code:

$quote=$this->quote->create(); //Create object of quote
        $quote->setStore($store); //set store for which you create quote
        $customer= $this->customerRepository->getById($customer->getEntityId());
        $quote->setCurrency();
        $quote->assignCustomer($customer); //Assign quote to customer

        //add items in quote
        foreach($orderData['items'] as $item){
            $product = $this->getProduct($item['product_id']);
//            $product->setPrice($item['price']);
            $product->setPrice(0);
            $quote->addProduct(
                $product,
                intval($item['qty'])
            );
        }

        //Set Address to quote
        $quote->getBillingAddress()->addData($orderData['shipping_address']);
        $quote->getShippingAddress()->addData($orderData['shipping_address']);

        // Collect Rates and Set Shipping & Payment Method
$this->shippingRate
    ->setCode('freeshipping_freeshipping')
    ->getPrice(1);
$shippingAddress = $quote->getShippingAddress();
//@todo set in order data
$shippingAddress->setCollectShippingRates(true)
    ->collectShippingRates()
    ->setShippingMethod('flatrate_flatrate'); //shipping method
$quote->getShippingAddress()->addShippingRate($this->shippingRate);
$quote->setPaymentMethod('checkmo'); //payment method
        $quote->setInventoryProcessed(false); //not effetc inventory

            $this->quoteRepository->save($quote);
//        $quote->save(); //Now Save quote and your quote is ready

            // Set Sales Order Payment
            $quote->getPayment()->importData(['method' => 'checkmo']);

            // Collect Totals & Save Quote
            $quote->collectTotals();

            $this->quoteRepository->save($quote);

            // Create Order From Quote (exception here)
            $order = $this->quoteManagement->submit($quote);

Answer 2

To make above code working(By Hassan) ,

Make sure Flat Rate shipping method is enabled in backend

Check that Country selected in Shipping address is selected in Ship to specific countries dropdown for Flat rate (In case you have selected Specific countries in Ship to Applicable Countries Dropdown)