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saifalik8679
saifalik8679
Known Participant
September 8, 2022
Question

Not able to get the value of a expression rule using script task

  • September 8, 2022
  • 6 replies
  • 1 view

Hi Appian  Pals, 
I have an expression rule which is calculating some data and that data is organized into a map and that list of map is being required to be called in a process variable.
In order to do this, I created a script task and then, I saved the output of this rule to a process variable and that variable is made using the required CDT.

The main issue is that the variable is not getting the value after the evaluation of the rule in the script task.
Can you please help me find a way through it?

Below is the output of that expression rule in the form of map. I have used the approach to calculate the value using refresh variables with refreshAlways:true



Looking for a better guidance.

Thanks in advance..

6 replies

stefanhelzle0001
stefanhelzle0001
Brainy
September 8, 2022

The issue is, that your expression creates a list of lists where each sub-list contains one map.

Two questions.

1) Could it be that you use a foreach and wrapped the a!map() call into curly brackets? Remove them.

2) Why do you create a map instead of the CDT type?

saifalik8679
saifalik8679Author
Known Participant
September 8, 2022

Thanks for the directions Stefan
Let me try to remove the map and directly bind it to the CDT type object.

mikes0011
mikes0011
Brainy
September 8, 2022

Without seeing the process instance value of your PV it's hard to tell exactly, but among other possibilities, your property names don't match, so the expression rule's value would NEVER save properly into a CDT where the map value properties are named "13thDay" and the CDT's corresponding property is named "ThirteenthDay" (etc).  Appian would have absolutely no way of knowing that those property names are referring to the "same" thing, even though they evaluate to the same literal meaning in English.

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