Adding resource category edit abilities

app/models/ability.rb

@@ -5,6 +5,7 @@ class Ability
     can :read, Mac # Anonymous can read mac
     can :scan, Mac # Need anonymous so CRON can scan
     can :read, Resource
+    can :read, ResourceCategory
 
     if !user.nil?
 
@@ -36,7 +37,8 @@ class Ability
       unless user.orientation.blank?
         can [:read,:new_member_report,:activity], User, :hidden => [nil,false]
         can :read, UserCertification
-        can [:create,:update,:destroy], Resource, :user_id => [nil,user.id]
+        can [:create,:update], Resource, :user_id => [nil,user.id]
+        can [:create,:update,:destroy], ResourceCategory
       end 
 
       # Accountants can manage payments

app/models/resource.rb

@@ -1,9 +1,9 @@
 class Resource < ActiveRecord::Base
-  attr_accessible :supercategory, :user_id, :category_id, :name, :serial, :specs, :status, :donatable, :picture, :picture_file_name, :picture_content_type, :picture_file_size, :picture_updated_at, :notes, :estimated_value, :disposed_at, :modified_by
+  attr_accessible :supercategory, :user_id, :resource_category_id, :name, :serial, :specs, :status, :donatable, :picture, :picture_file_name, :picture_content_type, :picture_file_size, :picture_updated_at, :notes, :estimated_value, :disposed_at, :modified_by
 
   belongs_to :owner, :class_name => "ToolshareUser" #TODO: remove owner
   belongs_to :user
-  belongs_to :category, :class_name => "ResourceCategory"
+  belongs_to :resource_category
   has_attached_file :picture,  #TODO: move to local storage
                     :styles => { :medium => "300x300>",
 	                         :thumb => "100x100>",
@@ -13,7 +13,7 @@ class Resource < ActiveRecord::Base
                     :path => ":attachment/:id/:style.:extension",
                     :bucket => 'Toolshare'
 
-  def category_name
-    self.category.name if self.category
+  def resource_category_name
+    resource_category.name if resource_category
   end
 end

app/models/resource_category.rb

@@ -1,3 +1,13 @@
 class ResourceCategory < ActiveRecord::Base
   has_many :resources
+  attr_accessible :name
+
+  before_destroy :has_resources?
+
+  private
+
+  def has_resources?
+    errors.add(:base, "Cannot delete category with associated resources") unless resources.count == 0
+    errors.blank? #return false, to not destroy the element, otherwise, it will delete.
+  end
 end