Ash Framework•2mo ago

TypedStruct with array and default

I have a typed_struct with an {:array, OtherStruct} field. Passing data to new() works as expected but after adding default: [] to the field, the field only returns []. I'm not sure if this is a bug or intended. Structs:

defmodule MyApp.Balance do
  use Ash.TypedStruct

  typed_struct do
    field :points_balance, :float
    field :rewards, {:array, MyApp.Reward}, default: []
  end
end

defmodule MyApp.Reward do
  use Ash.TypedStruct

  typed_struct do
    field :name, :string
  end
end

defmodule MyApp.Balance do
  use Ash.TypedStruct

  typed_struct do
    field :points_balance, :float
    field :rewards, {:array, MyApp.Reward}, default: []
  end
end

defmodule MyApp.Reward do
  use Ash.TypedStruct

  typed_struct do
    field :name, :string
  end
end

Data:

data = %{ "points_balance" => 150.0, "rewards" => [ %{"name" => "Free Coffee"}, %{"name" => "10% Discount"} ] }

data = %{ "points_balance" => 150.0, "rewards" => [ %{"name" => "Free Coffee"}, %{"name" => "10% Discount"} ] }

With default: []

MyApp.Balance.new(data)
{:ok, %MyApp.Balance{points_balance: 150.0, rewards: []}}

MyApp.Balance.new(data)
{:ok, %MyApp.Balance{points_balance: 150.0, rewards: []}}

Without default: []

MyApp.Balance.new(data)
{:ok,
 %MyApp.Balance{
   points_balance: 150.0,
   rewards: [
     %MyApp.Reward{name: "Free Coffee"},
     %MyApp.Reward{name: "10% Discount"}
   ]
 }}

MyApp.Balance.new(data)
{:ok,
 %MyApp.Balance{
   points_balance: 150.0,
   rewards: [
     %MyApp.Reward{name: "Free Coffee"},
     %MyApp.Reward{name: "10% Discount"}
   ]
 }}

2 Replies

ZachDaniel•2mo ago

Sounds like a bug to me 🙂

absowootOP•2mo ago

I'll go ahead and create an issue on GH

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TypedStruct with array and default

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