List properties

Hi Pedro,

In addition to the reply of @Cristiano Silva ,  you can use %Dictionary.CompiledClass instead of PropertyDefinition to retrieve also properties in parents classes.

There is a query available : 

select *
from %Dictionary.CompiledClassQuery_MemberSummary('class.name','a')

See class reference

query MemberSummary(classname As %String, kind As %String)
Selects Name As %String(MAXLEN=256)

Return a list of members of this specific kind which is one of the following:

• a - Property
• f - Foreign key
• i - Index
• j - Projection
• m - Method
• n - Constraint
• o - System method
• p - Parameter
• q - Query
• s - Storage defintion
• t - Trigger
• u - Comment text block
• x - XData

Create an abstract class and add it to all your classes, where a list of properties (for whatever reason) is needed 

Class DC.ClassInfo [ Abstract ]
{

/// Return property info: %PropNames(all)
/// 
/// all: 1 = Return a list of all properties<br>
///      0 = Return a list of storable properties only
ClassMethod PropNames(all = 0) As %String [ CodeMode = objectgenerator ]
{
    s (prop(0),prop(1))=""
    f i=1:1:%compiledclass.Properties.Count() {
        s p=%compiledclass.Properties.GetAt(i), s=p.Storable
        s prop(s)=prop(s)_$e(",",prop(s)]"")_p.Name
    }
    d %code.WriteLine($c(9)_"s stor="""_prop(1)_"""")
    d %code.WriteLine($c(9)_"q $s(all:"""_prop(0)_$e(",",prop(0)]"")_"""_stor,1:stor)")
    q $$$OK
}

}

For example

Class My.Person Extends (%Persistent, DC.ClassInfo)
{
Property Name As %String;
Property Age As %Integer;
}

Putting all together

write ##class(My.Person).PropNames() --> Age,Name
write ##class(My.Person).PropNames(1) --> %%OID,%Concurrency,Age,Name

// That way, in your application, you can easily check,
// if a property exists or not
if $length(##class(My.Person).PropNames(), ",", "TestProp") -->0
if $length(##class(My.Person).PropNames(), ",", "Age") -->1

If you use VS Code you might like to see how one of the extensions in https://openexchange.intersystems.com/package/DX-Jetpack-for-VS-Code shows you all the properties (and other class members, such as methods).