send tiding when create shixun

app/models/shixun.rb

@@ -62,6 +62,8 @@ class Shixun < ApplicationRecord
   scope :field_for_recommend, lambda{ select([:id, :name, :identifier, :myshixuns_count]) }
   scope :find_by_ids,lambda{|k| where(id:k)}
 
+  after_create :send_tiding
+
   # REDO: 
   def propaedeutics
     shixun_info.try(:propaedeutics)
@@ -242,4 +244,11 @@ class Shixun < ApplicationRecord
   def finished_challenges_count(user)
     Game.joins(:myshixun).where(user_id: user.id, status: 2, myshixuns: { shixun_id: id }).count
   end
+
+  private
+
+  def send_tiding
+    self.tidings << Tiding.new(:user_id => self.user_id, :trigger_user_id => self.user_id, :belong_container_id => self.id, :belong_container_type =>'Shixun', :tiding_type => "System", :viewed => 0)
+  end
+
 end