discourse/discourse · error · ArgumentError

canonical url lacks location argument

Error message

canonical url lacks location argument

What it means

Error "canonical url lacks location argument" thrown in discourse/discourse.

Source

Thrown at lib/onebox/engine/google_maps_onebox.rb:131

          @placeholder_height = @placeholder_width = 120
        when :streetview
          @streetview = true
          panoid = match[:pano]
          lon = match[:lon].to_f.to_s
          lat = match[:lat].to_f.to_s
          heading = match[:heading].to_f.round(4).to_s
          pitch = (match[:pitch].to_f / 10.0).round(4).to_s
          fov = (match[:zoom].to_f / 100.0).round(4).to_s
          zoom = match[:zoom].to_f.round
          @url =
            "https://www.google.com/maps/embed?pb=!3m2!2sen!4v0!6m8!1m7!1s#{panoid}!2m2!1d#{lon}!2d#{lat}!3f#{heading}!4f#{pitch}!5f#{fov}"
          @placeholder =
            "https://maps.googleapis.com/maps/api/streetview?size=690x400&location=#{lon},#{lat}&pano=#{panoid}&fov=#{zoom}&heading=#{heading}&pitch=#{pitch}&sensor=false"
        when :canonical
          query = URI.decode_www_form(uri.query).to_h
          if !query.has_key?("ll")
            unless query.has_key?("sll")
              raise ArgumentError, "canonical url lacks location argument"
            end
            query["ll"] = query["sll"]
            @url += "&ll=#{query["sll"]}"
          end
          location = query["ll"]
          if !query.has_key?("z")
            unless query.has_key?("spn") || query.has_key?("sspn")
              raise ArgumentError, "canonical url has incomplete query arguments"
            end
            if !query.has_key?("spn")
              query["spn"] = query["sspn"]
              @url += "&spn=#{query["sspn"]}"
            end
            angle = query["spn"].split(",").first.to_f
            zoom = (Math.log(690.0 * 360.0 / angle / 256.0) / Math.log(2)).round
          else
            zoom = query["z"]
          end

View on GitHub (pinned to 1b2d7253e8)

When it happens

Trigger: Thrown at lib/onebox/engine/google_maps_onebox.rb:131 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of discourse/discourse@1b2d7253e8 (2026-08-26). Data as JSON: /api/errors/9d876ae259d216bb. Report an issue: GitHub.