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absinthe lib absinthe phase schema arguments data.ex
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lib/absinthe/phase/schema/arguments/data.ex

defmodule Absinthe.Phase.Schema.Arguments.Data do
@moduledoc false
# Populate all arguments in the SDL with their provided data values.
#
# See Absinthe.Phase.Document.Arguments.Data for a more expansive
# explanation; this phase limits itself to arguments and values.
alias Absinthe.Blueprint.Input
alias Absinthe.{Blueprint}
use Absinthe.Phase
def run(input, _options \\ []) do
# By using a postwalk we can worry about leaf nodes first (scalars, enums),
# and then for list and objects merely grab the data values.
result = Blueprint.postwalk(input, &handle_node/1)
{:ok, result}
end
def handle_node(%Input.Argument{input_value: input} = node) do
%{node | value: input.data}
end
def handle_node(%Input.Value{normalized: %Input.List{items: items}} = node) do
data_list = for %{data: data} = item <- items, Input.Value.valid?(item), do: data
%{node | data: data_list}
end
def handle_node(%Input.Value{normalized: %Input.Object{fields: fields}} = node) do
data =
for field <- fields, include_field?(field), into: %{} do
{field.schema_node.identifier, field.input_value.data}
end
%{node | data: data}
end
def handle_node(node) do
node
end
defp include_field?(%{input_value: %{normalized: %Input.Null{}}}), do: true
defp include_field?(%{input_value: %{data: nil}}), do: false
defp include_field?(%{schema_node: nil}), do: false
defp include_field?(_), do: true
end