trigger Testordersopp on Order (after insert,after update) {
        // Get all related opportunities from orders
    Set<Id> opportunityIds = new Set<Id>();
   List<Order> orderList = new List<Order>();
    for(Order o : Trigger.new)
    {
        if(o.QuoteId != NULL)
        {
            opportunityIds.add(o.QuoteId);
            orderList.add(o);
        }
    }

    // Query for all opportunities with their related opportunity line items
    //Map<Id,Quote> oppsWithLineItems = new Map<Id,quote>([SELECT Id, (SELECT Description,Id,ListPrice,Name,QuoteId,Product2Id,ProductCode,Quantity,TotalPrice,UnitPrice FROM QuoteLineItems) WHERE Id IN :opportunityIds]);
    Map<Id, Quote> oppsWithLineItems = new Map<Id, Quote>([SELECT Id, (SELECT Description,Id,ListPrice,Name,QuoteId,Product2Id,ProductCode,Quantity,TotalPrice,UnitPrice FROM QuoteLineItems) WHERE Id IN :opportunityIds]);

    if(opportunityIds.size() > 0)
    {
        // Loop through orders
        List<OrderItem> orderItemsForInsert = new List<OrderItem>();
        for(Order o : ordersList)
        {
            // For each order get the related opportunity and line items, loop through the line items and add a new order line item to the order line item list for each matching opportunity line item
            Quote oppWithLineItem = oppsWithLineItems.get(o.QuoteId);
            for(QuoteLineItem oli : oppWithLineItem.QuoteLineItems)
            {
                orderItemsForInsert.add(new OrderItem(AvailableQuantity=Quantity,OrderId=o.Id));
            }
        }
        // If we have order line items, insert data
        if(orderItemsForInsert.size() > 0)
        {
            insert orderItemsForInsert;
        }
    }


}