个人动态的级联新增和级联删除

app/models/course_activity.rb

@@ -4,4 +4,27 @@ class CourseActivity < ActiveRecord::Base
   belongs_to :course_act ,:polymorphic => true
   belongs_to :course
   belongs_to :user
+  has_many :user_acts, :class_name => 'UserAcivity',:as =>:act
+  after_save :add_user_activity
+  before_destroy :destroy_user_activity
+
+  #在个人动态里面增加当前动态
+  def add_user_activity
+    user_activity = UserActivity.where("act_type = '#{self.class.to_s}' and act_id = '#{self.id}'").first
+    if user_activity
+      user_activity.save
+    else
+      user_activity = UserActivity.new
+      user_activity.act_id = self.id
+      user_activity.act_type = self.class.to_s
+      user_activity.container_type = "Course"
+      user_activity.container_id = self.course_id
+      user_activity.save
+    end
+  end
+
+  def destroy_user_activity
+    user_activity = UserActivity.where("act_type = '#{self.class.to_s}' and act_id = '#{self.id}'")
+    user_activity.destroy_all
+  end
 end

app/models/forge_activity.rb

@@ -19,5 +19,27 @@ class ForgeActivity < ActiveRecord::Base
   validates :project_id,presence: true
   validates :forge_act_id,presence: true
   validates :forge_act_type, presence: true
+  has_many :user_acts, :class_name => 'UserAcivity',:as =>:act
+  after_save :add_user_activity
+  before_destroy :destroy_user_activity
 
+  #在个人动态里面增加当前动态
+  def add_user_activity
+    user_activity = UserActivity.where("act_type = '#{self.class.to_s}' and act_id = '#{self.id}'").first
+    if user_activity
+      user_activity.save
+    else
+      user_activity = UserActivity.new
+      user_activity.act_id = self.id
+      user_activity.act_type = self.class.to_s
+      user_activity.container_type = "Project"
+      user_activity.container_id = self.project_id
+      user_activity.save
+    end
+  end
+
+  def destroy_user_activity
+    user_activity = UserActivity.where("act_type = '#{self.class.to_s}' and act_id = '#{self.id}'")
+    user_activity.destroy_all
+  end
 end