class JSON::ParserError

This exception is raised if a parser error occurs.

Attributes

column [R]

Column number where the parser encountered an error. Is nil when raised by JSON::ResumableParser.

line [R]

Line number where the parser encountered an error. Is nil when raised by JSON::ResumableParser.

Public Instance Methods

json_path ()

Source

# File ext/json/lib/json/common.rb, line 161
def json_path
  return @json_path if String === @json_path

  if Array === @json_path
    path = build_json_path(@json_path)
    @json_path = path unless frozen?
    return path
  end
end

Returns a best effort JSONPath string representing where in the document the parser encountered an error:

begin
  JSON.parse('{"articles": [ { "title": invalid } ]}')
rescue JSON::ParserError => error
  error.json_path # => "$.articles[0].title"
end

Private Instance Methods

build_json_path (segments)

Source

# File ext/json/lib/json/common.rb, line 173
def build_json_path(segments)
  error = false
  path = segments.filter_map do |segment|
    next if error

    case segment
    when Integer
      "[#{segment}]"
    when String, Symbol
      if segment.match?(/\A[a-zA-Z\$\_][a-zA-Z\$\_0-9]*\z/)
        ".#{segment}"
      else
        segment = segment.to_s.gsub(/["\\]/, { '"' => '\\"', '\\' => '\\\\' })
        %{["#{segment}"]}
      end
    else
      error = true
      nil
    end
  end.join
  "$#{path}".freeze
end