Rails Workflow Engine operation template example

stock_provisioning.rb

module DemoTemplates
  class StockProvisioning < Workflow::OperationTemplate
    def resolve_dependency operation
      resource = operation.data[:resource]
      # resource is order. 
      # for every order line we check if product needs provisioning 
      # (if it's amount lower that provisioning limit)
      resource.order_lines.map(:product).any?{|p| p.need_provisioning? }
    end
  end
end