#434

backend/app/services/counts_exporter.rb

@@ -14,7 +14,7 @@ class CountsExporter
       return
     end
     allowed = (CountsQuery::KEYS + CountsStateQuery::KEYS + EXTRA_KEYS).uniq
-    raise ArgumentError if (params.keys - allowed).any?
+    QueryState.validate!(params, allowed)
     raise ArgumentError unless params.values.all? { _1.is_a?(String) }
 
     @params = params
@@ -65,8 +65,8 @@ class CountsExporter
                      sort: export_sort,
                      child_sort: sort_metadata(@params.fetch('child_sort', '')),
                      columns: @projection.metadata,
-                     children: @params['children']&.split(','),
-                     field_order: @params.fetch('order', '').split(','), timezone: 'UTC',
+                     children: @params['children']&.split(' '),
+                     field_order: @QueryState.list(params.fetch('order', '')), timezone: 'UTC',
                      count: @mode == 'summary' ? page[:group_count] : page[:count],
                      totals: page[:totals], coverage: page[:coverage] }
             output << (format == 'json' ? "{\"metadata\":#{ meta.to_json },\"data\":[" : "\uFEFF")
@@ -103,7 +103,7 @@ class CountsExporter
   end
 
   def sort_metadata(value)
-    value.split(',').map do |entry|
+    value.split(' ').map do |entry|
       key, direction = entry.split(':', 2)
       { key:, direction: }
     end