Using attribute reference from variable content in unlang

[Charles-Antoine Guillat-Guignard]

Hello,

I am trying to implement some db based attribute handling (names, operator and values from db), and I am struggling with a dynamic handling of 
attributes references (names).

Looking at https://freeradius.org/radiusd/man/unlang.txt (ATTRIBUTE REFERENCES section), I see no exemple matching what I want to do (attribute 
name is always known, and static).

What I try to achieve would look a bit like that (which doesn't work) : :

# Exemple for Attributes-Actions values
# A-AL-AAA,:=,1
# A-AL-DHCP,:=,0

foreach &Attributes-Actions {
	update request {
		Attributes-Action := "%{Foreach-Variable-2}"
	}

	%{explode:Attributes-Action ,}

	update reply {
		# for debugging, contains expected value
		Reply-Message += "index 0 : %{Attributes-Action[0]}"
		# this fails
		"%{Attributes-Action[0]}" := "%{Attributes-Action[2]}"
	}
}

Am I missing something? Is there another way to achieve dynamic handling of attributes names, to be able to modify an attribute whose 
name/reference is not pre-declared in unlang script (unknown in unlang script, but ofc declared in dictionary).

Thank you in advance.

Kind regards,

Charles-Antoine Guillat-Guignard
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