Is it possible to have a running total variable in a loop?

Configuration Blueprints
1

If something like this:

repeat:
  for_each: '{{ elements }}'
  sequence:
    - if: '{{ blaha }}'
      then:
        - variables:
            repeat_item_value: '{{ some template logic }}'

Could I sum up all repeat_item_value fields while repeating?
And also based on a criteria?
I want the last item in the list to have access to the running total. Possible?

2

No because of how variable scope works.

What are you trying to find the sum of? It may be possible to compute it with a template.

3

Not like that.
You can if you create a number helper and accumulate the count in that. As 123 said, variables will not work because of scope, but number helpers have a global scope.

Tricky and messy, but it’s possible.

Here I store an input_boolean and update it in an inner loop in order to tell the end of the automation what happened in the inner loop and decide on a final action, for instance. I suggest you create this as hidden because it will only be referenced within this BP/Automation.

I would love to see automations get a this.xxx variable that the user could write to with global scope within the running automation. Then you could store transient things in a global (to the automation) scope. Would be very handy.

4

I have a collection of production and consumption sensors that the user can add to the BP. I would like to get a total of them without having the user to create additional template/helper sensors.

Thanks for the tip. Kind of messy when end user needs to add a helper, but better then a template sensor. Hopefully global scope variables comes in the near feature.

5

I haven’t seen that suggested anywhere, so don’t hold your breath, It is an idea, not even a FR yet.

6

This sounds like something you can compute with a templated script variable (within the blueprint).