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lib/absinthe/phase/document/validation/provided_non_null_arguments.ex
defmodule Absinthe.Phase.Document.Validation.ProvidedNonNullArguments do
@moduledoc false
# Validates document to ensure that all non-null arguments are provided.
alias Absinthe.{Blueprint, Phase, Schema, Type}
use Absinthe.Phase
@doc """
Run the validation.
"""
@spec run(Blueprint.t(), Keyword.t()) :: Phase.result_t()
def run(input, _options \\ []) do
result =
Blueprint.update_current(input, fn op ->
Blueprint.prewalk(op, &handle_node(&1, input.schema))
end)
{:ok, result}
end
@spec handle_node(Blueprint.node_t(), Schema.t()) :: Blueprint.node_t()
# Missing Arguments
defp handle_node(%Blueprint.Input.Argument{value: nil, flags: %{missing: _}} = node, schema) do
node = node |> put_error(error(node, node.schema_node.type, schema))
{:halt, node}
end
defp handle_node(node, _) do
node
end
# Generate the error for this validation
@spec error(Blueprint.node_t(), Type.t(), Schema.t()) :: Phase.Error.t()
defp error(node, type, schema) do
type_name = Type.name(type, schema)
%Phase.Error{
phase: __MODULE__,
message: error_message(node.name, type_name),
locations: [node.source_location]
}
end
@doc """
Generate the argument error.
"""
@spec error_message(String.t(), String.t()) :: String.t()
def error_message(name, type_name) do
~s(In argument "#{name}": Expected type "#{type_name}", found null.)
end
end