Module: GraphQL::StaticValidation::ArgumentLiteralsAreCompatible

Defined in:
lib/graphql/static_validation/rules/argument_literals_are_compatible.rb

Instance Method Summary collapse

Instance Method Details

#on_argument(node, parent) ⇒ Object

TODO dedup with ArgumentsAreDefined



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# File 'lib/graphql/static_validation/rules/argument_literals_are_compatible.rb', line 6

def on_argument(node, parent)
  parent_defn = case parent
  when GraphQL::Language::Nodes::InputObject
    arg_defn = context.argument_definition
    if arg_defn.nil?
      nil
    else
      arg_ret_type = arg_defn.type.unwrap
      if !arg_ret_type.is_a?(GraphQL::InputObjectType)
        nil
      else
        arg_ret_type
      end
    end
  when GraphQL::Language::Nodes::Directive
    context.schema.directives[parent.name]
  when GraphQL::Language::Nodes::Field
    context.field_definition
  else
    raise "Unexpected argument parent: #{parent.class} (##{parent})"
  end

  if parent_defn && !node.value.is_a?(GraphQL::Language::Nodes::VariableIdentifier)
    arg_defn = parent_defn.arguments[node.name]
    if arg_defn
      begin
        valid = context.valid_literal?(node.value, arg_defn.type)
      rescue GraphQL::CoercionError => err
        context.schema.error_bubbling
        if !context.schema.error_bubbling && !arg_defn.type.unwrap.kind.scalar?
          # if error bubbling is disabled and the arg that caused this error isn't a scalar then
          # short-circuit here so we avoid bubbling this up to whatever input_object / array contains us
          return super
        end
        error = GraphQL::StaticValidation::ArgumentLiteralsAreCompatibleError.new(err.message, nodes: parent, type: "CoercionError")
      rescue GraphQL::LiteralValidationError => err
        # check to see if the ast node that caused the error to be raised is
        # the same as the node we were checking here.
        matched = if arg_defn.type.kind.list?
          # for a list we claim an error if the node is contained in our list
          Array(node.value).include?(err.ast_value)
        elsif arg_defn.type.kind.input_object? && node.value.is_a?(GraphQL::Language::Nodes::InputObject)
          # for an input object we check the arguments
          node.value.arguments.include?(err.ast_value)
        else
          # otherwise we just check equality
          node.value == (err.ast_value)
        end
        if !matched
          # This node isn't the node that caused the error,
          # So halt this visit but continue visiting the rest of the tree
          return super
        end
      end

      if !valid
        error ||= begin
          kind_of_node = node_type(parent)
          error_arg_name = parent_name(parent, parent_defn)

          GraphQL::StaticValidation::ArgumentLiteralsAreCompatibleError.new(
            "Argument '#{node.name}' on #{kind_of_node} '#{error_arg_name}' has an invalid value. Expected type '#{arg_defn.type}'.",
            nodes: parent,
            type: kind_of_node,
            argument: node.name
          )
        end
        add_error(error)
      end
    end
  end

  super
end