Creating an Order

/**
* The below method demonstrates how to create Order
* The input of this method is Quote Number 
*/
 
public static void createOrder(String quoteNumber) {
    // Query to retrieve proposal line items based on the provided quote number
    List<Apttus_Proposal__Proposal_Line_Item__c> proposalLineItems = [
        SELECT Id, 
               Apttus_Proposal__Proposal__r.Apttus_Proposal__Account__c, 
               Apttus_Proposal__Proposal__r.Apttus_QPConfig__PriceListId__c, 
               Apttus_Proposal__Proposal__r.Apttus_Proposal__ExpectedStartDate__c, 
               Apttus_Proposal__Proposal__r.Apttus_Proposal__ExpectedEndDate__c 
        FROM Apttus_Proposal__Proposal_Line_Item__c 
        WHERE Apttus_Proposal__Proposal__r.Name = :quoteNumber 
          AND Apttus_QPConfig__ParentBundleNumber__c = NULL 
          AND Apttus_QPConfig__IsPrimaryLine__c = true
    ];

    // Initialize the order creation request object
    Apttus_CPQApi.CPQ.CreateOrderRequestDO request = new Apttus_CPQApi.CPQ.CreateOrderRequestDO();
     Please uncomment the line below and add all the custom field API names that are required to be copied from PLI to OLI
    // List<String> customFields = new List<String>{'CustomField1__c','CustomField2__c','CustomField3__c'};
	// Check if there are any proposal line items returned from the query
    if (!proposalLineItems.isEmpty()) {
        // Loop through each proposal line item to prepare the order items
        for (Apttus_Proposal__Proposal_Line_Item__c proposalLineItem : proposalLineItems) {
            // Create a selected product object for each proposal line item
            Apttus_CPQApi.CPQ.SelectedProductDO selectedProduct = new Apttus_CPQApi.CPQ.SelectedProductDO();
            selectedProduct.SourceId = proposalLineItem.Id; // Set the source ID
			if(customFields.size() > 0){
			   selectedProduct.SourceFields = customFields; // Pass the custom fields that need to copy the values from PLI to OLI. 
			}
            request.OrderItems.add(selectedProduct); // Add selected product to the order items
        }
    }
    // Create the order input object
    Apttus_Config2__Order__c orderInput = new Apttus_Config2__Order__c();
    // Populate the order input fields with values from the first proposal line item
    orderInput.Apttus_Config2__SoldToAccountId__c = proposalLineItems[0].Apttus_Proposal__Proposal__r.Apttus_Proposal__Account__c;
    orderInput.Apttus_Config2__PriceListId__c = proposalLineItems[0].Apttus_Proposal__Proposal__r.Apttus_QPConfig__PriceListId__c;
    orderInput.Apttus_Config2__OrderStartDate__c = proposalLineItems[0].Apttus_Proposal__Proposal__r.Apttus_Proposal__ExpectedStartDate__c;
    orderInput.Apttus_Config2__OrderEndDate__c = proposalLineItems[0].Apttus_Proposal__Proposal__r.Apttus_Proposal__ExpectedEndDate__c;
    // Set the order item source
    request.orderItemSource = Apttus_CPQApi.CPQ.ITEMSOURCE_QUOTE_LINEITEM;
    request.OrderInput = orderInput; // Attach the order input to the request
    // Call the API to create the order and capture the response
    Apttus_CPQApi.CPQ.CreateOrderResponseDO createOrderResponseDO = Apttus_CPQApi.CPQWebService.createOrder(request);
    // Log the response for debugging purposes
    System.debug('createOrderResponseDO:-- ' + createOrderResponseDO);
}
 
     createOrder('Q-01959076');