cla add count

app/models/cla.rb

@@ -35,4 +35,9 @@ class Cla < ApplicationRecord
                     pr_need: params[:pr_need]
                 )
     end
+
+
+    def fresh_count
+        update(count:self.users.count)
+    end
 end

app/models/user_cla.rb

@@ -22,6 +22,9 @@ class UserCla < ApplicationRecord
     belongs_to :cla
 # identity 0: 教师教授 1: 学生, 2: 专业人士, 3: 开发者
     enum state: { deafult: 0, signed: 1, failed: 2}
+    after_create do 
+        cla.fresh_count
+    end
 
     def self.build(params,user_id)
         self.create!(user_id: user_id,