inflowERP/app/models/so_sales_order_line.rb

class SoSalesOrderLine < InflowServer
  self.table_name = 'So_SalesOrder_Line'
  self.primary_key = 'SalesOrderLineId'

  belongs_to :order, class_name: "SoSalesOrder", foreign_key: "SalesOrderId", primary_key: "SalesOrderId"
end