Added support for STI deliverables

* HourlyDeliverables cost are based on the time used
* FixedDeliverables are based on a flat rate
* Added a checkbox on the new Deliverable form to pick which one to use

  #1135

app/controllers/deliverables_controller.rb

@@ -31,9 +31,15 @@ class DeliverablesController < ApplicationController
   end
   
   def create
-    @deliverable = Deliverable.new(params[:deliverable])
+    if params[:deliverable][:type] == FixedDeliverable.name
+      @deliverable = FixedDeliverable.new(params[:deliverable])
+    elsif params[:deliverable][:type] == HourlyDeliverable.name
+      @deliverable = HourlyDeliverable.new(params[:deliverable])
+    else
+      @deliverable = Deliverable.new(params[:deliverable])
+    end
+    
     @deliverable.project = @project
-
     respond_to do |format|
       if @deliverable.save
         @flash = l(:notice_successful_create)

app/models/fixed_deliverable.rb

@@ -0,0 +1,3 @@
+class FixedDeliverable < Deliverable
+  unloadable
+end

app/models/hourly_deliverable.rb

@@ -0,0 +1,3 @@
+class HourlyDeliverable < Deliverable
+  unloadable
+end

app/views/deliverables/_form.html.erb

@@ -17,8 +17,10 @@
       </div>
 
       <div class="splitcontentright">
-        <%# TODO: Need to update subtotals with observers %>
-        <p>TODO: Fixed cost</p>
+        <p>
+          <label for="deliverable_type">Fixed Cost</label>
+          <%= check_box(:deliverable, :type, {}, FixedDeliverable.name, HourlyDeliverable.name) %>
+        </p>
 
         <p><%= f.text_field :cost_per_hour, :size => 7 %></p>
         <%= observe_field('deliverable_cost_per_hour', :function => "new Budget.updateAmounts();") %>