删除项目的时候，项目动态级联删除

app/models/project.rb

@@ -91,8 +91,10 @@ class Project < ActiveRecord::Base
                             
   has_many :tags, :through => :project_tags, :class_name => 'Tag'
   has_many :project_tags, :class_name => 'ProjectTags'
+  # 动态级联删除
+  has_many :forge_activities, :class_name => 'ForgeActivity', :dependent => :destroy
   # 关联虚拟表
-    has_many :forge_messages, :class_name =>'ForgeMessage', :as => :forge_message, :dependent => :destroy
+  has_many :forge_messages, :class_name =>'ForgeMessage', :as => :forge_message, :dependent => :destroy
 
   belongs_to :organization