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108 lines
2.4 KiB
Elixir
108 lines
2.4 KiB
Elixir
defmodule Ash.Test.CalculationTest do
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@moduledoc false
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use ExUnit.Case, async: true
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defmodule Concat do
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# An example concatenation calculation, that accepts the delimeter as an argument
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use Ash.Calculation, type: :string
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def init(opts) do
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if opts[:keys] && is_list(opts[:keys]) && Enum.all?(opts[:keys], &is_atom/1) do
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{:ok, opts}
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else
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{:error, "Expected a `keys` option for which keys to concat"}
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end
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end
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def calculate(records, opts, %{separator: separator}) do
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Enum.map(records, fn record ->
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Enum.map_join(opts[:keys], separator, fn key ->
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to_string(Map.get(record, key))
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end)
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end)
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end
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end
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defmodule User do
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@moduledoc false
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use Ash.Resource, data_layer: Ash.DataLayer.Ets
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ets do
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private?(true)
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end
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actions do
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read :default
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create :default
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update :default
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end
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attributes do
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attribute :id, :uuid, primary_key?: true, default: &Ecto.UUID.generate/0
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attribute :first_name, :string
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attribute :last_name, :string
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end
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calculations do
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calculate :full_name, {Concat, keys: [:first_name, :last_name]} do
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argument :separator, :string, default: " "
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end
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end
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end
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defmodule Api do
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@moduledoc false
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use Ash.Api
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resources do
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resource(User)
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end
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end
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setup do
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User
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|> Ash.Changeset.new(%{first_name: "zach", last_name: "daniel"})
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|> Api.create!()
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User
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|> Ash.Changeset.new(%{first_name: "brian", last_name: "cranston"})
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|> Api.create!()
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:ok
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end
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test "it uses default arguments" do
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full_names =
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User
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|> Ash.Query.load(:full_name)
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|> Api.read!()
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|> Enum.map(& &1.full_name)
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|> Enum.sort()
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assert full_names == ["brian cranston", "zach daniel"]
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end
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test "arguments can be supplied" do
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full_names =
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User
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|> Ash.Query.load(full_name: %{separator: " - "})
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|> Api.read!()
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|> Enum.map(& &1.full_name)
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|> Enum.sort()
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assert full_names == ["brian - cranston", "zach - daniel"]
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end
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test "custom calculations can be added to a query" do
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full_names =
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User
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|> Ash.Query.calculate(:full_name, {Concat, keys: [:first_name, :last_name]}, %{
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separator: " \o.o/ "
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})
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|> Api.read!()
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|> Enum.map(& &1.calculations.full_name)
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|> Enum.sort()
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assert full_names == ["brian \o.o/ cranston", "zach \o.o/ daniel"]
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end
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end
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