lib/comma/extractors.rb in crafterm-comma-0.1.7 vs lib/comma/extractors.rb in crafterm-comma-0.1.8

@@ -1,26 +1,30 @@
 module Comma
-  
+
   class Extractor
 
     def initialize(instance, &block)
       @instance = instance
       @block = block
       @results = []
     end
-    
+
     def results
       instance_eval &@block
       @results
     end
+
+    def id
+      method_missing(:id)
+    end
   end
-  
+
   class HeaderExtractor < Extractor
-    
+
     def method_missing(sym, *args, &block)
       @results << sym.to_s.humanize if args.blank?
-      
+
       args.each do |arg|
         case arg
         when Hash
           arg.each do |k, v|
             @results << ((v.is_a? String) ? v : v.to_s.humanize)
@@ -33,23 +37,23 @@
           raise "Unknown header symbol #{arg.inspect}"
         end
       end
     end
   end
-  
+
   class DataExtractor < Extractor
-    
+
     def method_missing(sym, *args, &block)
       @results << @instance.send(sym).to_s if args.blank?
-      
+
       args.each do |arg|
         case arg
         when Hash
           arg.each do |k, v|
-            @results << @instance.send(sym).send(k).to_s
+            @results << (@instance.send(sym).nil? ? '' : @instance.send(sym).send(k).to_s )
           end
         when Symbol
-          @results << @instance.send(sym).send(arg).to_s
+            @results << ( @instance.send(sym).nil? ? '' : @instance.send(sym).send(arg).to_s )
         when String
           @results << @instance.send(sym).to_s
         else
           raise "Unknown data symbol #{arg.inspect}"
         end