ClassMethod with global parameter undefined when attempting to Order
I have a class method that accepts a global parameter but when I attempt to order this global, the global name is listed as undefined. I can execute $DATA(pGlobalName) successfully.
ClassMethod ExamineGlobal(pGlobalName As %Global) {set gStatus=$DATA( pGlobalName) ; returns 1 write "This is the global name: "_pGlobalNameset gmin=$ORDER( pGlobalName("")) ; here pGlobalName is undefined}
In debug mode, data returns 1 for a valid global with no descendants. This is expected.
However, when I call $ORDER, it shows <UNDEFINED> for pGlobalName. My guess is that ORDER is operating on the local variable pGlobalName instead of its value? How can I 'dereference' the variable name so that the Order method operates on its value rather than the name itself?
I want to use this for an array of seventy globals and would rather have o single method call to perform work for each global rather than having to explicitly write code for every global.
Thank you.
I should mention that I am using Cache Ensemble 2010.
with
set gStatus=$DATA(pGlobalName)you check the existence of your call parameterbut
set gStatus=$DATA(@pGlobalName) check the existence of your Globalto go for the Global you require indirection
thereforeset gmin=$ORDER(@pGlobalName@(""))will meet your expectations
EXCELLENT! That is exactly what I needed.
Also, you correctly observed that $DATA(pGlobalName) was only evaluating the local parameter and not its value. My return value is now 10.
Thank you Robert.
Indirection docs.