How to process an event only when value changed (to a target value) within an interface?

hi thomas, you can have a boolean variable which will have true or false when a attribute gets changed , based on this variable you can design your process flow.

The trick here is that you will need to save the old value in a local variable set to never refresh. Then you can compare that to the new value. I suggest to put that logic into the saveInto of the submit button. Store that result into a boolean which then controls the process.

Hello , Hello ,

thank you for your suggestions.

I was able to achieve my goal doing the following:

• Interface
  
  • new rule input valueChanged as Boolean
  • local variable oldValue set to the value I want to monitor by using a!refreshVariable(value: ri![MY_VALUE], refreshOnReferencedVarChange: false)
  • Submit-Button saveInto: a!save(ri!valueChanged, if(local!oldValue<>ri![MY_VALUE], TRUE, FALSE))
• Process
  • add process variable (and assign it to the rule input)
  • add process logic accordingly

KR
Thomas

Great to hear that you get this working. A small hint:

if(local!oldValue<>ri![MY_VALUE], TRUE, FALSE))

can be replaced by

local!oldValue<>ri![MY_VALUE]

as a comparison always evaluates to a boolean result.