table.rb in data-table-2.0.1

- old
+ new

@@ -282,17 +282,24 @@
     # ancestors should be an array
     def render_subtotals(group_header, _group_data = nil, ancestors = nil)
       html = ''
       path = ancestors.nil? ? [] : ancestors.dup
       path << group_header
+
+      is_first_subtotal = true
+
       @subtotal_calculations[path].each_with_index do |group, index|
-        html << "<tr class='subtotal index_#{index}'>"
+        next if group.empty?
+        
+        html << "<tr class='subtotal index_#{index} #{'first' if is_first_subtotal}'>"
         @columns.each do |col|
           value = group[col.name] ? group[col.name].values[0] : nil
           html << col.render_cell(value)
         end
         html << '</tr>'
+
+        is_first_subtotal = false
       end
       html
     end
 
     def subtotal(column_name, function = nil, index = 0, &block)
@@ -337,11 +344,13 @@
       @subtotals.each_with_index do |subtotal_type, index|
         subtotal_type.each do |subtotal|
           @collection.each_pair_with_parents(@groupings.count) do |group_name, group_data, parents|
             path = parents + [group_name]
             result = calculate(group_data, subtotal[0], subtotal[1], path)
-            @subtotal_calculations[path][index] ||= {}
+            (0..index).each do |index|
+              @subtotal_calculations[path][index] ||= {}
+            end
             @subtotal_calculations[path][index][subtotal[0]] = {subtotal[1] => result}
           end
         end
       end
     end
@@ -434,10 +443,12 @@
     # if both a block and a function are given then the default aggregate function is called first
     # then its result is passed into the block for further processing.
     def total_row(collection, column_name, function = nil, index = nil, &block)
       function_or_block = function || block
       f = function && block_given? ? [function, block] : function_or_block
-      collection[index] = {} if collection[index].nil?
+      (0..index).each do |index|
+        collection[index] = {} if collection[index].nil?
+      end
       collection[index][column_name] = f
     end
   end
 end