Is it possible to use lists in the Evaluation Context?

[jmkelm08]

I would like to be able to target users based on group membership. In my scenario, a user can be a member of multiple groups, so I put "groups": ["Group1", "Group2"] in the Evaluation Context. I attempted to target the user with query: '"Group1" in groups', but it seems the right side of the in operator must be a constant expression (for example, query: 'group in ["Group1", "Group2"]' does work assuming "group": "Group1" has been added to the Evaluation Context).

Note: I tested using https://gofeatureflag.org/editor with the configurations shown below

Evaluation Context

{
  "key": "aae1cb41-c3cb-4753-a117-031ddc958e81",
  "custom": {
    "anonymous": true,
    "firstname": "John",
    "lastname": "Doe",
    "email": "[email protected]",
    "company": "GO Feature Flag",
    "groups": ["Group1", "Group2"],
    "group": "Group1"
  }
}

Flag Definition 1 (does not work)

my-first-flag:
  variations:
    Variation_1: true
    Variation_2: false
  targeting:
    - name: Rule 1
      query: '"Group1" in groups'
      variation: Variation_1
  defaultRule:
    variation: Variation_2

Flag Definition 2 (does work)

my-first-flag:
  variations:
    Variation_1: true
    Variation_2: false
  targeting:
    - name: Rule 1
      query: 'group in ["Group1", "Group2"]'
      variation: Variation_1
  defaultRule:
    variation: Variation_2

What is the best way to accomplish this type of targeting logic?

[thomaspoignant]

The rule evaluation is based on https://github.com/nikunjy/rules and it seems that this is not supported for now.
I will look at it more in detail and try to provide more information.