#434

backend/app/services/counts_resource_definition.rb

@@ -1,5 +1,22 @@
 # Server-owned version identities, attributes and field types. No client SQL is accepted.
 class CountsResourceDefinition
+  # Compatibility belongs at the request boundary, not in field definitions.
+  def self.normalise_params(params)
+    params.each_with_object({}) do |(key, value), result|
+      result[key] = value
+      next unless value.is_a?(String)
+
+      if ['columns', 'order', 'sort', 'rows', 'cols', 'axis'].include?(key)
+        result[key] = value.split(/ /, -1).map { |token|
+          token.sub(/\Ais_latest(?=:|\z)/, 'latest')
+        }.join(' ')
+      elsif (key.match?(/\A(?:conditions|drill)\.[0-9]+\.field\z/) &&
+          value == 'is_latest')
+        result[key] = 'latest'
+      end
+    end
+  end
+
   COMMON = { 'resource_id' => :integer, 'version_no' => :integer,
              'event_type' => :enum, 'user' => :integer, 'created_at' => :datetime }.freeze
   DEFINITIONS = {
@@ -35,7 +52,7 @@ class CountsResourceDefinition
       interval: ['range'] }.freeze
   LABELS = {
       'resource_id' => 'counts:columns.resourceId', 'version_no' => 'counts:columns.version',
-      'is_latest' => 'counts:columns.latest', 'event_type' => 'counts:eventType',
+      'latest' => 'counts:columns.latest', 'event_type' => 'counts:eventType',
       'user' => 'history:actor', 'created_at' => 'counts:columns.changedAt',
       'thumbnail' => 'counts:columns.thumbnailDisplay',
       'thumbnail_base' => 'counts:columns.thumbnailURL',
@@ -101,7 +118,7 @@ class CountsResourceDefinition
               when 'tags' then ['name', 'names', 'category', 'aliases', 'parents', 'deprecated']
               else fields.keys - COMMON.keys
               end
-    keys = ['resource_id', 'version_no', 'is_latest'] + (content - ['thumbnail']) +
+    keys = ['resource_id', 'version_no', 'latest'] + (content - ['thumbnail']) +
         ['event_type', 'user', 'created_at']
     keys.unshift('thumbnail') if content.include?('thumbnail')
     keys.map do |key|