Sorting the Project column by project name now

* Including projects in Rate.history_for_user
* Moved the valid sort options to a constant on the RatesController
* Changed the ValidSortOptions to use the Project name for project_id
* Updated admin view to use RatesController::ValidSortOptions instead of a
  duplicated string.

  #1915

app/controllers/rates_controller.rb

@@ -7,11 +7,13 @@ class RatesController < ApplicationController
   before_filter :require_user_id, :only => [:index, :new]
   before_filter :set_back_url, :only => [:new, :edit]
   
+  ValidSortOptions = {'date_in_effect' => "#{Rate.table_name}.date_in_effect", 'project_id' => "#{Project.table_name}.name"}
+  
   # GET /rates?user_id=1
   # GET /rates.xml?user_id=1
   def index
     sort_init "#{Rate.table_name}.date_in_effect", "desc"
-    sort_update ['date_in_effect', 'project_id']
+    sort_update ValidSortOptions
 
     @rates = Rate.history_for_user(@user, sort_clause)
 

app/models/rate.rb

@@ -14,7 +14,8 @@ class Rate < ActiveRecord::Base
   named_scope :history_for_user, lambda { |user, order|
     {
       :conditions => { :user_id => user.id },
-      :order => order
+      :order => order,
+      :include => :project
     }
   }
   

app/views/users/_rates.html.erb

@@ -9,7 +9,7 @@
 <%# TODO: Refactor out of the view once there is a hook in the controller (Post 0.8.0). %>
 <%# Can't expect everyone to upgrade at the moment %>
 <% sort_init "#{Rate.table_name}.date_in_effect", "desc" %>
-<% sort_update ['date_in_effect', 'project_id'] %>
+<% sort_update RatesController::ValidSortOptions %>
 
 <% @rates = Rate.history_for_user(@user, "#{Rate.table_name}.date_in_effect desc") %>