class GraphQL::Schema::Field::DynamicResolve

def call(obj, args, ctx)
  if obj.respond_to?(@method_name)
    public_send_field(obj, @method_name, args, ctx)
  elsif obj.object.respond_to?(@method_name)
    public_send_field(obj.object, @method_name, args, ctx)
  elsif obj.object.is_a?(Hash)
    inner_object = obj.object
    inner_object[@method_name] || inner_object[@method_sym]
  else
    raise <<-ERR
o implement #{ctx.irep_node.owner_type.name}.#{ctx.field.name}, tried:
.class}##{@method_name}`, which did not exist
.object.class}##{@method_name}`, which did not exist
g up hash key `#{@method_name.inspect}` on `#{obj}`, but it wasn't a Hash
ment this field, define one of the methods above (and check for typos)
  end
end

def initialize(method_name:, connection:, extras:)
  @method_name = method_name
  @method_sym = method_name.to_sym
  @connection = connection
  @extras = extras
end

def public_send_field(obj, method_name, graphql_args, field_ctx)
  if graphql_args.any? || @extras.any?
    # Splat the GraphQL::Arguments to Ruby keyword arguments
    ruby_kwargs = {}
    graphql_args.keys.each do |key|
      ruby_kwargs[Schema::Member::BuildType.underscore(key).to_sym] = graphql_args[key]
    end
    if @connection
      # Remove pagination args before passing it to a user method
      ruby_kwargs.delete(:first)
      ruby_kwargs.delete(:last)
      ruby_kwargs.delete(:before)
      ruby_kwargs.delete(:after)
    end
    @extras.each do |extra_arg|
      # TODO: provide proper tests for `:ast_node`, `:irep_node`, `:parent`, others?
      ruby_kwargs[extra_arg] = field_ctx.public_send(extra_arg)
    end
  else
    ruby_kwargs = NO_ARGS
  end
  if ruby_kwargs.any?
    obj.public_send(method_name, ruby_kwargs)
  else
    obj.public_send(method_name)
  end
end