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lib/absinthe/type/argument.ex
defmodule Absinthe.Type.Argument do
@moduledoc """
Used to define an argument.
Usually these are defined using `Absinthe.Schema.Notation.arg/2`
"""
alias Absinthe.Type
use Type.Fetch
@typedoc """
Argument configuration
* `:name` - The name of the argument, usually assigned automatically using `Absinthe.Schema.Notation.arg/2`.
* `:type` - The type values the argument accepts/will coerce to.
* `:deprecation` - Deprecation information for an argument, usually
set-up using `Absinthe.Schema.Notation.deprecate/1`.
* `:description` - Description of an argument, useful for introspection.
"""
@type t :: %__MODULE__{
name: binary,
type: Type.identifier_t(),
default_value: any,
deprecation: Type.Deprecation.t() | nil,
description: binary | nil,
__reference__: Type.Reference.t()
}
defstruct name: nil,
description: nil,
type: nil,
deprecation: nil,
default_value: nil,
__reference__: nil
@doc """
Build an AST of the args map for inclusion in other types
## Examples
```
iex> build([foo: [type: :string], bar: [type: :integer]])
{:%{}, [],
[foo: {:%, [],
[{:__aliases__, [alias: false], [:Absinthe, :Type, :Argument]},
{:%{}, [], [name: "foo", type: :string]}]},
bar: {:%, [],
[{:__aliases__, [alias: false], [:Absinthe, :Type, :Argument]},
{:%{}, [], [name: "bar", type: :integer]}]}]}
```
"""
def build(args) when is_list(args) do
ast =
for {arg_name, arg_attrs} <- args do
name = arg_name |> Atom.to_string()
arg_data = arg_attrs |> Keyword.put(:name, name)
arg_ast =
quote do: %Absinthe.Type.Argument{
unquote_splicing(arg_data |> Absinthe.Type.Deprecation.from_attribute())
}
{arg_name, arg_ast}
end
quote do: %{unquote_splicing(ast)}
end
defimpl Absinthe.Traversal.Node do
def children(node, _traversal) do
[node.type]
end
end
end