shopify_fulfillment.rb

# Login to shopify console and copy-paste the following script:
order_count = ShopifyAPI::Order.count
nb_pages    = (order_count / 250.0).ceil

# Looking for orders with only these products
PRODUCT_IDS = [144760487, 144107049]

# 10 minutes times 60 seconds per minute.
CYCLE = 5 * 60

# Initializing.
start_time = Time.now

1.upto(nb_pages) do |page|

  unless page == 1
    stop_time = Time.now
    puts "Current batch processing started at #{start_time.strftime('%I:%M%p')}"
    puts "The time is now #{stop_time.strftime('%I:%M%p')}"
    processing_duration = stop_time - start_time
    puts "The processing lasted #{processing_duration.to_i} seconds."
    wait_time = (CYCLE - processing_duration).ceil
    puts "We have to wait #{wait_time.to_i} seconds then we will resume."
    sleep wait_time
    start_time = Time.now
  end

  puts "Doing page #{page}/#{nb_pages}..."
  orders = ShopifyAPI::Order.find( :all, :params => { :limit => 250, :page => page } )

  orders.each do |order|
    skip = false

    if order.fulfillment_status == "fulfilled"
      skip = true
    else
      order.line_items.each do |line_item|
        if PRODUCT_IDS.include? line_item.product_id
          skip = false
        else
          skip = true
          break
        end
      end
    end

    if skip
      # puts "Order #{order.id} doesn't qualify!!"
    else
      f = ShopifyAPI::Fulfillment.new(:order_id => order.id)
      f.prefix_options = { :order_id => order.id }
      f.save
      puts "Order #{order.id} has been fulfilled"
    end
  end
end