How to Create user filter from expression rule

Correct try above my  implementation. Let me know

I applied the code for the user filter expression  you provided above, which seems to be the exact code used to create the expression rule??? 

In any case... here's the error.

You have to replace record from line no. 9 
to

  a!recordFilterList(
    name: "OutcomeStatus",
    options: a!forEach(
      items: rule!AP_Outcome_Status(),
      expression: a!recordFilterListOption(
        id: fv!index,
        name: fv!item.OutcomeStatus_grouping1,
        filter: a!queryFilter(
          field: /*"Replace record here"*/,
          operator: "=",
          value: fv!item.OutcomeStatus_grouping1
        )
      )
    )
  )

Ok. Things are getting clearer. 

This is my expression rule, to obtain distinct values from "OutcomeStatus" column:

Next, my user filter, which I see access the "alias" from my rule, but the rule output does not have an index.

So, the user filter is expecting an fv!index and there is none 

I get no errors, but the filter displays no values. 

I got it working! Thank you all for your help, and now I understand how to generate dynamic drop-down user filters for my applicaiton!

Good to hear that.