I’m trying to create a many_to_many relationship between User (Ash Authentication) and Group (or a team, etc) with a role. I’m looking to use this to track which users belong to which groups and to enforce policies.

I’ve created a join resource GroupMember with a role attribute and belongs_to relationships but for the life of me I can’t figure out manage_relationships with setting the :role on the join.

Anyone have an example I could learn from?

defmodule GroupMember do
   attributes do
    uuid_primary_key :id

    attribute :role, :atom,  constraints [one_of: [:admin, :moderator, :member]]
  end

  relationships do
    belongs_to :group, Group
    belongs_to :user, User
   end
end

defmodule User do
...
  relationships do
    many_to_many :groups, Group do
      through GroupMember
    end
  end

 actions do
    update :join_group do
      require_atomic? false

      argument :group_id, :uuid do
        allow_nil? false
      end

      argument :role, Hestia.Accounts.Role do
        allow_nil? false
        default Hestia.Accounts.Role.default()
      end

      change manage_relationship(???)
    end
end
...
 end