ViewModel Column in Nested ViewModel class – self refers to result of Expression

[SteveAParticipant]

Greetings to all
“ViewModel Column in Nested ViewModel class – self refers to result of Expression.” This is true for “Expression:” (in my case “ClientInvoice”).
HOWEVER “Readonly Expression” and “Visible Expression” and “Disabled Expression” are using class for the root level of the ViewModel (in my case “ProjectOwner”). So I can invoke a method such as self.IssueInvoiceEffect i.e ClientInvoice.IssueInvoiceEffect but I cannot use the trigger self.trigger_IssueInvoice? for the disabled expression

The viewmodel expression editor reports
Context ProjectOwner
5:”trigger_IssueInvoice?” is not a member of “ProjectOwner”

The the viewmodel Editor reports
“The column IssueInvoiceEffect has a ExpressionForReadOnly that does not evaluate to bool”

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[AdminKeymaster]

All the ReadOnly, Visible StyleRef expressions have the viewmodel root object as self.
To evaluate the expression for a nesting you should use the vCurrent_ variable for that nesting instead of self.
In your case try vCurrent_SelectClientInvoice.trigger_IssueInvoice?

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