faker-ruby/faker · error · ArgumentError

Size should be specified in format 300x300

Error message

Size should be specified in format 300x300

What it means

Error "Size should be specified in format 300x300" thrown in faker-ruby/faker.

Source

Thrown at lib/faker/default/avatar.rb:40

      # @example
      #   Faker::Avatar.image(slug: "my-own-slug")
      #     #=> "https://robohash.org/my-own-slug.png?size=300x300&set=set1"
      # @example
      #   Faker::Avatar.image(slug: "my-own-slug", size: "50x50")
      #     #=> "https://robohash.org/my-own-slug.png?size=50x50&set=set1"
      # @example
      #   Faker::Avatar.image(slug: "my-own-slug", size: "50x50", format: "jpg")
      #     #=> "https://robohash.org/my-own-slug.jpg?size=50x50&set=set1"
      # @example
      #   Faker::Avatar.image(slug: "my-own-slug", size: "50x50", format: "bmp")
      #     #=> "https://robohash.org/my-own-slug.bmp?size=50x50&set=set1"
      # @example
      #   Faker::Avatar.image(slug: "my-own-slug", size: "50x50", format: "bmp", set: "set1", bgset: "bg1")
      #     #=> "https://robohash.org/my-own-slug.bmp?size=50x50&set=set1&bgset=bg1"
      #
      # @faker.version 1.4.3
      def image(slug: nil, size: '300x300', format: 'png', set: 'set1', bgset: nil)
        raise ArgumentError, 'Size should be specified in format 300x300' unless size =~ /\A[0-9]+x[0-9]+\z/
        raise ArgumentError, "Supported formats are #{SUPPORTED_FORMATS.join(', ')}" unless SUPPORTED_FORMATS.include?(format)

        slug ||= Faker::Lorem.words.join
        bgset_query = "&bgset=#{bgset}" if bgset
        "https://robohash.org/#{slug}.#{format}?size=#{size}&set=#{set}#{bgset_query}"
      end
    end
  end
end

View on GitHub (pinned to cca4184947)

When it happens

Trigger: Thrown at lib/faker/default/avatar.rb:40 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of faker-ruby/faker@cca4184947 (2026-08-21). Data as JSON: /api/errors/8d7c88cf8432094e. Report an issue: GitHub.