Request properties (new style): Change parameter type dynamically

Regarding number 2, I think that you cannot change the parameter type to Query in the script.  But should be able to set the value of the parameter in the script with ParameterSet("ParameterName").Value = <Your Value> and setting the parameter to ReadOnly and make it optional with ParameterSet("ParameterName").IsReadOnly = True and ParameterSet("ParameterName").IsMandatory = False

Regarding number 1, I need to dig into this thoroughly about how to access the property.

I do not know if the following is working in 9.2 as well but it works in 9.3. But remember that the code is not just called when the parameter value has changed but during the initialization of the property as well.

' You need to check if your code is running for the parameterset assigned to the AccProductParamCategory (the parent parameterset)
' or for the parameterset assigned to your ShoppingCartItem.
If ParameterSet.UsedBy.TableName = "ShoppingCartItem" Then
	' Get the entity the parameterSet is assigned to
	Dim dbEntity As IEntity = Session.Source.Get(ParameterSet.UsedBy, EntityLoadType.ReadOnly)
	
	Dim uidPersonOrdered = dbEntity.GetValue(Of String)(Table.ShoppingCartItem.UID_PersonOrdered)
	' Do something with the uidPersonOrdered
	Log.Info(String.Format("NON-INIT: UID_PersonOrdered = '{0}'.", uidPersonOrdered))    
End If

Thanks Markus! I'll give it a try! 

Not only that it compiles in v92: It works too!!

Thanks Markus!! 

Glad to hear that it is working.

Hi Juan Carlos,

just to be sure, are we talking about 9.2.0 or 9.2.1?
If 9.2.0, do you have any hotfixes installed for the angular web?

Hi Florian,

It's 9.2.0 and ,yes, the latests commits have been applied to the qbm and qer libraries. There are customizations in my code, but none that affect the itshop. Anything I should check?

What I've noticed is that the OnPropertyChangedScript is executed several times. I know it should run during initialization and when the parameter value has changed, but logs indicate that even at startup that gets done more than once.

Now I wonder.. if the parameter is changed by this script , wouldnt that start an deadlock loop?

Just out of my head from my observation:

On startup (create a new request) initialization is called twice, once for the loaded parameter of the parameter set assigned to AccProductParamCategory (the definition or base parameter if you like) and once for the initialization of the new parameter of the new parameter set for the new ShoppingCartItem.

You need to keep that in mind.

Thanks, Markus. Yes, it's run twice as you said.

Things I've noticed in v920: The OnPropertyChangedScript is executed even when you try to edit the request property in Manager. So be careful to add controls to avoid malfunction or you might find yourself deleting the whole request property. Also, if I set a value for the parameter on that script, I enter an infinite loop. 

I need to dig more. And I'll try to run it in v93 to see how it behaves.