Stefan Wintermeyer Comments

Stefan Wintermeyer

•Created by Stefan Wintermeyer on 9/24/2023 in #support

add_tag but unique

For the archive:

  identities do
    # identity :unique_name, [:name] <1>

    identity :name, [:name] do
      pre_check_with App.Shop
    end
  end

  identities do
    # identity :unique_name, [:name] <1>

    identity :name, [:name] do
      pre_check_with App.Shop
    end
  end

<1> Use with a PostgreSQL DB.

14 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/24/2023 in #support

add_tag but unique

How does that work code wise? https://ash-hq.org/docs/dsl/ash-resource#identities-identity-pre_check_with doesn't include an example.

14 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/24/2023 in #support

add_tag but unique

Do I use it wrong? Here's the tag resource:

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  identities do
    identity :unique_name, [:name]
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}

      change manage_relationship(:products,
               type: :append_and_remove,
               on_no_match: :create,
               use_identities: [:unique_name]
             )
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  identities do
    identity :unique_name, [:name]
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}

      change manage_relationship(:products,
               type: :append_and_remove,
               on_no_match: :create,
               use_identities: [:unique_name]
             )
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

With that I get this error:

** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Tag]
 The data layer does not support native checking of identities.

Identities: unique_name

Must specify the `pre_check_with` option.

        (spark 1.1.39) lib/spark/dsl/extension.ex:560: Spark.Dsl.Extension.raise_transformer_error/2
        (elixir 1.15.5) lib/enum.ex:4830: Enumerable.List.reduce/3
        (elixir 1.15.5) lib/enum.ex:2564: Enum.reduce_while/3
        (elixir 1.15.5) lib/enum.ex:984: Enum."-each/2-lists^foreach/1-0-"/2
        (elixir 1.15.5) lib/module/parallel_checker.ex:271: Module.ParallelChecker.check_module/3
        (elixir 1.15.5) lib/module/parallel_checker.ex:82: anonymous fn/6 in Module.ParallelChecker.spawn/4

** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Tag]
 The data layer does not support native checking of identities.

Identities: unique_name

Must specify the `pre_check_with` option.

        (spark 1.1.39) lib/spark/dsl/extension.ex:560: Spark.Dsl.Extension.raise_transformer_error/2
        (elixir 1.15.5) lib/enum.ex:4830: Enumerable.List.reduce/3
        (elixir 1.15.5) lib/enum.ex:2564: Enum.reduce_while/3
        (elixir 1.15.5) lib/enum.ex:984: Enum."-each/2-lists^foreach/1-0-"/2
        (elixir 1.15.5) lib/module/parallel_checker.ex:271: Module.ParallelChecker.check_module/3
        (elixir 1.15.5) lib/module/parallel_checker.ex:82: anonymous fn/6 in Module.ParallelChecker.spawn/4

14 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/24/2023 in #support

add_tag but unique

Can you give me an example of how to setup an identity? https://hexdocs.pm/ash/identities.html doesn't have any examples and the https://ash-hq.org internal search engine doesn't work right now. Here's my tag resource:

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}
      change manage_relationship(:products, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}
      change manage_relationship(:products, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

14 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/24/2023 in #support

How to add_tag? Managing Relationships

Thank you! I did not see that.

6 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/23/2023 in #support

many_to_many update problem

Ahhh! Thanks! It works.

13 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/23/2023 in #support

many_to_many update problem

I draw a blank here. The code already says:

    create :update do
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end

    create :update do
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end

Where would I include an other create?

13 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/23/2023 in #support

many_to_many update problem

@Zach Daniel Can you help me out here? I'd like to record the tutorial.

13 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/19/2023 in #showcase

Ash Resource - 3 minute introduction

3 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/23/2023 in #support

many_to_many update problem

I tried

iex(5)> App.Shop.Product.update!(banana, [yellow_tag])
** (FunctionClauseError) no function clause matching in anonymous fn/2 in Keyword.split/2

iex(5)> App.Shop.Product.update!(banana, [yellow_tag])
** (FunctionClauseError) no function clause matching in anonymous fn/2 in Keyword.split/2

But I don't know how to do the args: [tags] thing and I am lost in the documentation.

13 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/21/2023 in #showcase

Tutorial: belongs_to in 2 minutes

Thanks for the feedback. I'll add the version number. About the speed: It is meant to be stopped, repeated and slowed down.

4 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

Thanks! Solution for the archive:

defmodule App.Shop.ProductTag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  actions do
    defaults [:create, :read, :update, :destroy]
  end

  relationships do
    belongs_to :product, App.Shop.Product do
      primary_key? true
      allow_nil? false
    end

    belongs_to :tag, App.Shop.Tag do
      primary_key? true
      allow_nil? false
    end
  end
end

defmodule App.Shop.ProductTag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  actions do
    defaults [:create, :read, :update, :destroy]
  end

  relationships do
    belongs_to :product, App.Shop.Product do
      primary_key? true
      allow_nil? false
    end

    belongs_to :tag, App.Shop.Tag do
      primary_key? true
      allow_nil? false
    end
  end
end

iex(1)> good_deal_tag = App.Shop.Tag.create!(%{name: "Good deal"})
iex(2)> yellow_tag = App.Shop.Tag.create!(%{name: "Yellow"})
iex(3)> App.Shop.Product.create!(%{name: "Banana", tags: [good_deal_tag, yellow_tag]})
iex(4)> App.Shop.Product.by_name!("Banana", load: [:tags])
#App.Shop.Product<
  tags: [
    #App.Shop.Tag<
      products: #Ash.NotLoaded<:relationship>,
      products_join_assoc: #Ash.NotLoaded<:relationship>,
      __meta__: #Ecto.Schema.Metadata<:loaded>,
      id: "82b7e8af-69b9-4f35-b32a-0b6b2bed1d15",
      name: "Good deal",
      aggregates: %{},
      calculations: %{},
      ...
    >,
    #App.Shop.Tag<
      products: #Ash.NotLoaded<:relationship>,
      products_join_assoc: #Ash.NotLoaded<:relationship>,
      __meta__: #Ecto.Schema.Metadata<:loaded>,
      id: "d04aa5ef-195e-4dd8-9c5a-5c73e6f44afe",
      name: "Yellow",
      aggregates: %{},
      calculations: %{},
      ...
    >
  ],
  ...
>

iex(1)> good_deal_tag = App.Shop.Tag.create!(%{name: "Good deal"})
iex(2)> yellow_tag = App.Shop.Tag.create!(%{name: "Yellow"})
iex(3)> App.Shop.Product.create!(%{name: "Banana", tags: [good_deal_tag, yellow_tag]})
iex(4)> App.Shop.Product.by_name!("Banana", load: [:tags])
#App.Shop.Product<
  tags: [
    #App.Shop.Tag<
      products: #Ash.NotLoaded<:relationship>,
      products_join_assoc: #Ash.NotLoaded<:relationship>,
      __meta__: #Ecto.Schema.Metadata<:loaded>,
      id: "82b7e8af-69b9-4f35-b32a-0b6b2bed1d15",
      name: "Good deal",
      aggregates: %{},
      calculations: %{},
      ...
    >,
    #App.Shop.Tag<
      products: #Ash.NotLoaded<:relationship>,
      products_join_assoc: #Ash.NotLoaded<:relationship>,
      __meta__: #Ecto.Schema.Metadata<:loaded>,
      id: "d04aa5ef-195e-4dd8-9c5a-5c73e6f44afe",
      name: "Yellow",
      aggregates: %{},
      calculations: %{},
      ...
    >
  ],
  ...
>

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

defmodule App.Shop.ProductTag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  relationships do
    belongs_to :product, App.Shop.Product do
      primary_key? true
      allow_nil? false
    end

    belongs_to :tag, App.Shop.Tag do
      primary_key? true
      allow_nil? false
    end
  end
end

defmodule App.Shop.ProductTag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  relationships do
    belongs_to :product, App.Shop.Product do
      primary_key? true
      allow_nil? false
    end

    belongs_to :tag, App.Shop.Tag do
      primary_key? true
      allow_nil? false
    end
  end
end

That results in this error:

$ iex -S mix
Compiling 2 files (.ex)
** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Product]
 actions -> create -> create -> change -> manage_relationship -> tags:
  The following error was raised when validating options provided to manage_relationship.

** (RuntimeError) Required primary create action for App.Shop.ProductTag.
    (ash 2.14.17) lib/ash/resource/info.ex:493: Ash.Resource.Info.primary_action!/2
...

$ iex -S mix
Compiling 2 files (.ex)
** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Product]
 actions -> create -> create -> change -> manage_relationship -> tags:
  The following error was raised when validating options provided to manage_relationship.

** (RuntimeError) Required primary create action for App.Shop.ProductTag.
    (ash 2.14.17) lib/ash/resource/info.ex:493: Ash.Resource.Info.primary_action!/2
...

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

Here's the current code.

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}
      change manage_relationship(:products, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

defmodule App.Shop.Tag do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
  end

  relationships do
    many_to_many :products, App.Shop.Product do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :tag_id
      destination_attribute_on_join_resource :product_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :products, {:array, :map}
      change manage_relationship(:products, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

defmodule App.Shop.Product do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
    attribute :price, :decimal
  end

  relationships do
    many_to_many :tags, App.Shop.Tag do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :product_id
      destination_attribute_on_join_resource :tag_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

defmodule App.Shop.Product do
  use Ash.Resource, data_layer: Ash.DataLayer.Ets

  attributes do
    uuid_primary_key :id
    attribute :name, :string
    attribute :price, :decimal
  end

  relationships do
    many_to_many :tags, App.Shop.Tag do
      through App.Shop.ProductTag
      source_attribute_on_join_resource :product_id
      destination_attribute_on_join_resource :tag_id
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      primary? true
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end
  end

  code_interface do
    define_for App.Shop
    define :create
    define :read
    define :by_id, get_by: [:id], action: :read
    define :by_name, get_by: [:name], action: :read
    define :update
    define :destroy
  end
end

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end
  end

  actions do
    defaults [:read, :update, :destroy]

    create :create do
      argument :tags, {:array, :map}
      change manage_relationship(:tags, type: :append_and_remove, on_no_match: :create)
    end
  end

This raises an error:

$ iex -S mix
Compiling 2 files (.ex)
** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Product]
 actions -> create -> create -> change -> manage_relationship -> tags:
  The following error was raised when validating options provided to manage_relationship.

** (RuntimeError) Required primary create action for App.Shop.ProductTag.
[...]

$ iex -S mix
Compiling 2 files (.ex)
** (EXIT from #PID<0.98.0>) an exception was raised:
    ** (Spark.Error.DslError) [App.Shop.Product]
 actions -> create -> create -> change -> manage_relationship -> tags:
  The following error was raised when validating options provided to manage_relationship.

** (RuntimeError) Required primary create action for App.Shop.ProductTag.
[...]

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

Where exactly do I have to put this code?

argument :tags, {:array, :map}
change manage_relationship(:tags, type: :append_and_remove}

argument :tags, {:array, :map}
change manage_relationship(:tags, type: :append_and_remove}

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with many_to_many tags?

Is the later possible too?

18 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with a category id?

@barnabasj Since I am writing beginners documentation I'd like to know if I understand it right: Code like App.Shop.Product.create!(%{name: "Orange", price: 0.20, category: %{name: "Fruits"}} is not the Ash way or is it? I am not so much interested in what is possible by opening all escape hatches but what is the intended way of doing it. I have one new Category and I have one new Product. What is the fastest way of creating it? What is the Ash way of doing it?

15 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with a category id?

Thanks @barnabasj! For the archive. Here's the fixed code and how it's working:

  relationships do
    belongs_to :category, App.Shop.Category do
      attribute_writable? true
    end
  end

  relationships do
    belongs_to :category, App.Shop.Category do
      attribute_writable? true
    end
  end

iex(13)> orange = App.Shop.Product.create!(%{name: "Orange", price: 0.20, category_id: fruits.id})
#App.Shop.Product<
  category: #Ash.NotLoaded<:relationship>,
  __meta__: #Ecto.Schema.Metadata<:loaded>,
  id: "40cc21c2-58f8-4db4-8d98-7ab7c1741fa8",
  name: "Orange",
  price: Decimal.new("0.2"),
  category_id: "5b582e8a-3c19-4ce4-b609-88748a46e2ce",
  aggregates: %{},
  calculations: %{},
  ...
>

iex(13)> orange = App.Shop.Product.create!(%{name: "Orange", price: 0.20, category_id: fruits.id})
#App.Shop.Product<
  category: #Ash.NotLoaded<:relationship>,
  __meta__: #Ecto.Schema.Metadata<:loaded>,
  id: "40cc21c2-58f8-4db4-8d98-7ab7c1741fa8",
  name: "Orange",
  price: Decimal.new("0.2"),
  category_id: "5b582e8a-3c19-4ce4-b609-88748a46e2ce",
  aggregates: %{},
  calculations: %{},
  ...
>

This doesn't work:

App.Shop.Product.create!(%{name: "Orange", price: 0.20, category: fruits})

App.Shop.Product.create!(%{name: "Orange", price: 0.20, category: fruits})

Should it but I configured the resource wrong or shouldn't it never because this isn't ActiveRecord?

15 replies

AEAsh Elixir

•Created by Stefan Wintermeyer on 9/20/2023 in #support

How to create a product with a category id?

What is the right syntax for that? https://ash-hq.org/docs/dsl/ash-resource#relationships-belongs_to-attribute_writable- doesn't contain an example. This doesn't work:

  relationships do
    belongs_to :category, App.Shop.Category do
      writeable?: true
    end
  end

  relationships do
    belongs_to :category, App.Shop.Category do
      writeable?: true
    end
  end

15 replies

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