Not particularly.
required_fields = %{
index: ["id", "from", "to", "limit", "page"],
action2: ["id", "x", "y"]
}
IMO this is a huge smell that this is the wrong place for this logic - it’s in a common path for all actions in the controller, but needs specific behavior for each action.
What about extracting the internals of that to a plug and specifically inserting it for each action?
plug :required_fields, ["id", "from", "to", "etc"] when action == :index
plug :required_fields, ["something", "else"] when action == :action2
