lib/to_xls.rb in to_xls-0.1.0 vs lib/to_xls.rb in to_xls-0.1.1

@@ -43,20 +43,24 @@
     return data.string
   end
   
   private  
   def aux_to_xls(item, column, row)
-    if column.is_a?(String) or column.is_a?(Symbol)
+    if item.nil?
+      row.push(nil)
+    elsif column.is_a?(String) or column.is_a?(Symbol)
       row.push(item.send(column))
     elsif column.is_a?(Hash)
       column.each{|key, values| aux_to_xls(item.send(key), values, row)}
     elsif column.is_a?(Array)
       column.each{|value| aux_to_xls(item, value, row)}
     end
   end
   
   def aux_headers_to_xls(item, column, row)
-    if column.is_a?(String) or column.is_a?(Symbol)
+    if item.nil?
+      row.push(nil)
+    elsif column.is_a?(String) or column.is_a?(Symbol)
       row.push("#{item.class.name.underscore}_#{column}")
     elsif column.is_a?(Hash)
       column.each{|key, values| aux_headers_to_xls(item.send(key), values, row)}
     elsif column.is_a?(Array)
       column.each{|value| aux_headers_to_xls(item, value, row)}