AshPhoenix - Union: "is not a map" error

I can't figure out why these params don't work:

%{
  "access" => %{
    "_form_type" => "create",
    "_persistent_id" => "0",
    "_touched" => "_form_type,_persistent_id,_touched,_union_type,_unused_api_key,_unused_secret_key,api_key,secret_key",
    "_union_type" => "xyz",
    "api_key" => "dsf",
    "secret_key" => "sdf"
  },
  "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
  "label" => "asd"
}

%{
  "access" => %{
    "_form_type" => "create",
    "_persistent_id" => "0",
    "_touched" => "_form_type,_persistent_id,_touched,_union_type,_unused_api_key,_unused_secret_key,api_key,secret_key",
    "_union_type" => "xyz",
    "api_key" => "dsf",
    "secret_key" => "sdf"
  },
  "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
  "label" => "asd"
}

This is the failed form:

  source: #AshPhoenix.Form<
    action: :create,
    params: %{
      "access" => %Ash.Union{value: nil, type: :xyz},
      "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
      "label" => "asd"
    },
    raw_params: %{
      "access" => %{
        "_form_type" => "create",
        "_persistent_id" => "0",
        "_touched" => "_form_type,_persistent_id,_touched,_union_type,_unused_api_key,_unused_secret_key,api_key,secret_key",
        "_union_type" => "xyz",
        "api_key" => "dsf",
        "secret_key" => "sdf"
      },
      "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
      "label" => "asd"
    },  
  params: %{
    "access" => %Ash.Union{value: nil, type: :xyz},
    "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
    "label" => "asd"
  },
  errors: [access: {"is not a map", []}],

  source: #AshPhoenix.Form<
    action: :create,
    params: %{
      "access" => %Ash.Union{value: nil, type: :xyz},
      "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
      "label" => "asd"
    },
    raw_params: %{
      "access" => %{
        "_form_type" => "create",
        "_persistent_id" => "0",
        "_touched" => "_form_type,_persistent_id,_touched,_union_type,_unused_api_key,_unused_secret_key,api_key,secret_key",
        "_union_type" => "xyz",
        "api_key" => "dsf",
        "secret_key" => "sdf"
      },
      "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
      "label" => "asd"
    },  
  params: %{
    "access" => %Ash.Union{value: nil, type: :xyz},
    "account_id" => "0198dd77-e6cb-7d4c-a039-9e128da2ea8f",
    "label" => "asd"
  },
  errors: [access: {"is not a map", []}],

Can anyone please help me to debug?

7 Replies

minibOP•2mo ago

defmodule MyApp.Services.Credentials do
  use Ash.Resource,
    otp_app: :my_app,
    domain: MyApp.Services,
    a_layer: AshPostgres.DataLayer,
    authorizers: [Ash.Policy.Authorizer]

  postgres do
    table "credentials"
    repo Ober.Repo
  end

  actions do
    defaults [:read, :destroy, create: [:account_id, :label, :access]]
  end

  policies do
    policy do
      authorize_if relates_to_actor_via([:account, :user])
    end
  end

  attributes do
    uuid_v7_primary_key :id

    attribute :label, :string do
      allow_nil? false
      public? true
    end

    attribute :access, :credentials_type do
      allow_nil? false
      public? true
    end

    timestamps()
  end

  relationships do
    belongs_to :account, MyApp.Services.Account do
      allow_nil? false
    end
  end
end


defmodule MyApp.Services.Credentials.CredentialsType do
  use Ash.Type.NewType,
    subtype_of: :union,
    constraints: [
      types: [
        xyz: [
          type: :struct,
          constraints: [instance_of: MyApp.Services.Credentials.XyzCredentials],
          tag: :type,
          tag_value: :xyz
        ]
      ]
    ]
end

defmodule MyApp.Services.Credentials.XyzCredentials do
  use Ash.Resource, data_layer: :embedded

  actions do
    defaults [:read, create: [:api_key, :secret_key], update: [:api_key, :secret_key]]
  end

  attributes do
    attribute :api_key, :string, allow_nil?: false, public?: true
    attribute :secret_key, :string, allow_nil?: false, public?: true
  end
end

defmodule MyApp.Services.Credentials do
  use Ash.Resource,
    otp_app: :my_app,
    domain: MyApp.Services,
    a_layer: AshPostgres.DataLayer,
    authorizers: [Ash.Policy.Authorizer]

  postgres do
    table "credentials"
    repo Ober.Repo
  end

  actions do
    defaults [:read, :destroy, create: [:account_id, :label, :access]]
  end

  policies do
    policy do
      authorize_if relates_to_actor_via([:account, :user])
    end
  end

  attributes do
    uuid_v7_primary_key :id

    attribute :label, :string do
      allow_nil? false
      public? true
    end

    attribute :access, :credentials_type do
      allow_nil? false
      public? true
    end

    timestamps()
  end

  relationships do
    belongs_to :account, MyApp.Services.Account do
      allow_nil? false
    end
  end
end


defmodule MyApp.Services.Credentials.CredentialsType do
  use Ash.Type.NewType,
    subtype_of: :union,
    constraints: [
      types: [
        xyz: [
          type: :struct,
          constraints: [instance_of: MyApp.Services.Credentials.XyzCredentials],
          tag: :type,
          tag_value: :xyz
        ]
      ]
    ]
end

defmodule MyApp.Services.Credentials.XyzCredentials do
  use Ash.Resource, data_layer: :embedded

  actions do
    defaults [:read, create: [:api_key, :secret_key], update: [:api_key, :secret_key]]
  end

  attributes do
    attribute :api_key, :string, allow_nil?: false, public?: true
    attribute :secret_key, :string, allow_nil?: false, public?: true
  end
end

ZachDaniel•2mo ago

Hm...something is strange there Might need a repro/issue as it doesn't jump out at me You can try submitting the form with a ! to see if you get a better error Or using the new raw_errors tool to get the errors

minibOP•2mo ago

Hi @ZachDaniel, thanks so much for your reply and the hints! Unfortunately, I'm still running into the same issue. I've created a project reproducing the issue: https://github.com/minibikini/union_form_repro Full disclosure, I haven't been getting much sleep lately, so it's totally possible I'm just overlooking something obvious. Apologies in advance if it's something silly! 🙌

ZachDaniel•2mo ago

Did you open an issue as well? I lost track of this and issues is the best way for me to track things that need fixing

munksgaard•2mo ago

@minib Did you try with type: MyApp.Services.Credentials.XyzCredentials and without the constraints: [instance_of ...]? Also, shouldn't this:

    attribute :access, :credentials_type do
      allow_nil? false
      public? true
    end

    attribute :access, :credentials_type do
      allow_nil? false
      public? true
    end

    attribute :access, CredentialsType do
      allow_nil? false
      public? true
    end

    attribute :access, CredentialsType do
      allow_nil? false
      public? true
    end

minibOP•2mo ago

yes, tried both I've listed CredentialsType in the config as cutom type credentials_type. But in the reproducing repo I've used the module name instead. Nope, thought this belongs to here, support forum. Will open an issue.

minibOP•2mo ago

just created, here you go https://github.com/ash-project/ash_phoenix/issues/408

GitHub

AshPhoenix.Form: "is not a map" error for a union field · Issue #4...

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AshPhoenix - Union: "is not a map" error

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