faker-ruby/faker · error · ArgumentError

Supported formats are #{SUPPORTED_FORMATS.join(', ')}

Error message

Supported formats are #{SUPPORTED_FORMATS.join(', ')}

What it means

Error "Supported formats are #{SUPPORTED_FORMATS.join(', ')}" thrown in faker-ruby/faker.

Source

Thrown at lib/faker/default/avatar.rb:41

      #   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:41 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/87711ea89775f302. Report an issue: GitHub.