AE
Ash Elixir•3y ago
Blibs

Use Ash policies with simple functions

I was wondering if there is a way easy way to use Ash policies in places that you don't actually have an Ash resource. For example, I'm using FunWithFlags package for feature flags. I have a live view to handle the flags, and also a context module for it. Now I wan't to create some authorization code to this context module, and since I'm already using Ash for the rest of the system, I was wondering if there is a way to configure policies for a specific function.
1 Reply
ZachDaniel
ZachDaniel•3y ago
There is not a way currently, no. However well It depends 😆 If you can put your stuff behind a resource, then you can use policies 😆 
defmodule MyApp.Flags do
  use Ash.Resource,
    authorizers: [Ash.Policy.Authorizer]

  actions do
    read :read do
      prepare fn query, _ -> 
        Ash.DataLayer.Simple.set_data(query, [
         %__MODULE__{name: "foo", value: "value"}
         %__MODULE__{name: "bar", value: "value"}
         %__MODULE__{name: "baz", value: "value"}
        ])
      end
    end
  end

  attributes do
    # pkey is a necessity, but is a formality
    attribute :name, :string, allow_nil?: true, primary_key?: true
    attribute :value, :string, allow_nil?: true
  end

  policies do

  end
end
defmodule MyApp.Flags do
  use Ash.Resource,
    authorizers: [Ash.Policy.Authorizer]

  actions do
    read :read do
      prepare fn query, _ -> 
        Ash.DataLayer.Simple.set_data(query, [
         %__MODULE__{name: "foo", value: "value"}
         %__MODULE__{name: "bar", value: "value"}
         %__MODULE__{name: "baz", value: "value"}
        ])
      end
    end
  end

  attributes do
    # pkey is a necessity, but is a formality
    attribute :name, :string, allow_nil?: true, primary_key?: true
    attribute :value, :string, allow_nil?: true
  end

  policies do

  end
end

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