How to use class property ot type %Persistent in non persistent class (page)

Question

Question

#Beginner #Frontend #ObjectScript #Tips & Tricks #ZEN #InterSystems IRIS

Is there a way to use a property of the type %Persistent class in a %ZEN.Component.page class?
Example:

// Data class
Class PersistentClass Extends %Persistent
{
    Property Value As %String;
}

// Page class
Class ClassName Extends %ZEN.Component.page
{
  Property TestProperty As PersistentClass; 
}

The problem is that when using it the described in the example.
The property can be set in a Method like this:

Method DoStuff() As %Status  [ ZenMethod ]
{
    Set result = ##class(HBS.EnsUtil.CompanyFunctions).GetData(.aVariable) // aVariable is of type PersistentClass
    Set ..TestProperty = aVariable
    Quit result
}

But when reading the property in an other Method the content of it is not set:

Method ReadProperty() As %Status [ ZenMethod ]
{
    Write ..TestProperty.Value // the object has no content
    Quit $$$OK
}

Is it generally possible to work like this?
Or have I overlooked a special handling?

Product version: IRIS 2021.1

Discussion (2)2

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score 0 · Answer 1 · 2025-03-18T10:25:13-04:00

Hi !

It seems to work. Have you tried to look into the aVariable you get from the other company class (and check the type)?

I've tried to recreate your situation and all seems fine:

score 0 · Answer 2 · 2025-03-23T08:54:34-04:00

Yes, it is generally possible to use a property of the type %Persistent class in a %ZEN.Component.page class. You can set the property in a method and read it in another method. However, ensure that the variable you are setting is of the correct type and contains the expected data. You might want to check the type and content of the variable you are getting from the other class to ensure it is correctly set before assigning it to the property [1].