Migrated Style Parameters in the Migrated Code

• We'll create a new controller 'GetOrderStatisticsDemoNumberParameter`

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
    }
    public void Run()
    {
        Execute();
    }
} 

• In Magic, any parameter was also a local column

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
    }
    public void Run()
    {
        Execute();
    }
} 

• When we receive it as a parameter, we'll add it to the Run method, and call the BindParameter method to bind the parameter to the local column

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
    }
    public void Run(NumberParameter orderId)
    {
        BindParameter(OrderId, orderId);
        Execute();
    }
} 

• This is how the migrated code reflects parameters.
  • A Local column
  • A NumberParameter
  • And a call to the BindParameter method
• Since we use a local column for the parameter value, we can write the Where in the constructor, and we no longer have to write the Where in the Run method.
• The BindParameter method will make sure that the local column OrderId will have the value of the parameter and vice versa. This update will happen before the OnLoad method get's executed

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
        Where.Add(Order_Details.OrderID.IsEqualTo(OrderId));
    }
    public void Run(NumberParameter orderId)
    {
        BindParameter(OrderId, orderId);
        Execute();
    }
} 

• Let's add the Quantity

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    readonly NumberColumn Quantity = new NumberColumn();

    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
        Where.Add(Order_Details.OrderID.IsEqualTo(OrderId));
    }
    public void Run(NumberParameter orderId, NumberParameter quantity)
    {
        BindParameter(OrderId, orderId);
        BindParameter(Quantity, quantity);
        Execute();
    }
} 

• We need to make sure Quantity will be set to zero.

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    readonly NumberColumn Quantity = new NumberColumn();

    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
        Where.Add(Order_Details.OrderID.IsEqualTo(OrderId));
    }
    public void Run(NumberParameter orderId, NumberParameter quantity)
    {
        BindParameter(OrderId, orderId);
        BindParameter(Quantity, quantity);
        Execute();
    }
	protected override void OnStart()
    {
        Quantity.Value = 0;
    }
} 

• And update the Quantity local column in the OnLeaveRow method

public class GetOrderStatisticsDemoNumberParameter : BusinessProcessBase
{
    readonly Models.Order_Details Order_Details = new Models.Order_Details();
    readonly NumberColumn OrderId = new NumberColumn();
    readonly NumberColumn Quantity = new NumberColumn();

    public GetOrderStatisticsDemoNumberParameter()
    {
        From = Order_Details;
        Where.Add(Order_Details.OrderID.IsEqualTo(OrderId));
    }
    public void Run(NumberParameter orderId, NumberParameter quantity)
    {
        BindParameter(OrderId, orderId);
        BindParameter(Quantity, quantity);
        Execute();
    }
 	protected override void OnStart()
    {
        Quantity.Value = 0;
    }
    protected override void OnLeaveRow()
    {
        Quantity.Value += Order_Details.Quantity;
    }
} 

• The usage of BindParameter makes sure that when the controller ends, the value in the local column Quantity will be returned to the quantity NumberParameter

• Exercise Migrated Style Parameters

---

Help us improve, Edit this page on GitHub
or email us at info@fireflymigration.com