class and include_predecessor_id paramters added

lib/heritage/active_record/acts_as_heir.rb

@@ -2,29 +2,49 @@ module Heritage
   module ActiveRecord
     module ActsAsHeir
 
-      def child_of(parent_symbol)
-        acts_as_heir_of(parent_symbol)
+      def child_of(parent_symbol, params)
+        acts_as_heir_of(parent_symbol, params)
       end
 
-      def acts_as_heir_of(predecessor_symbol)
+      def acts_as_heir_of(predecessor_symbol, params)
         extend ClassMethods
         include InstanceMethods
 
         class_attribute :_predecessor_klass, :_predecessor_symbol
         self._predecessor_symbol = predecessor_symbol
-        self._predecessor_klass = Object.const_get(predecessor_symbol.to_s.capitalize)
+        if defined? params and not params.nil? and defined? params[:class] and not params[:class].nil? then
+          self._predecessor_klass = params[:class].constantize
+        else
+          self._predecessor_klass = predecessor_symbol.constantize
+        end
 
-        has_one :predecessor, :as => :heir, :class_name => predecessor_symbol.to_s.capitalize, :autosave => true, :dependent => :destroy
+        has_one :predecessor, :as => :heir, :class_name => self._predecessor_klass.to_s, :autosave => true, :dependent => :destroy
 
         alias_method_chain :predecessor, :build
 
         # Expose columns from the predecessor
-        self._predecessor_klass.columns.reject{|c| c.primary || c.name =~ /^heir_/}.map(&:name).each do |att|
-          define_method(att) do
-            predecessor.send(att)
+        self._predecessor_klass.columns.reject{|c| c.primary and not c.name.eql?("id") }.each do |att|
+          if att.primary then
+            if ( defined? params[:include_predecessor_id] and not params[:include_predecessor_id].nil? and params[:include_predecessor_id] == true) then
+              define_method(predecessor_symbol.to_s.underscore + "_id") do
+                predecessor.send(att.name)
+              end
+            end
+            next
+          end
+
+          if att.name =~ /^heir_/ then
+            define_method(predecessor_symbol.to_s.underscore + att.name) do
+              predecessor.send(att.name)
+            end
+            next
+          end
+
+          define_method(att.name) do
+            predecessor.send(att.name)
           end
-          define_method("#{att}=") do |val|
-            predecessor.send("#{att}=",val)
+          define_method("#{att.name}=") do |val|
+            predecessor.send("#{att.name}=",val)
           end
         end
 
@@ -71,4 +91,4 @@ def touch_predecessor
 
     end
   end
-end
+end