处理无效的数据

db/migrate/20190621105144_sync_ivalid_users.rb

@@ -1,6 +1,6 @@
-class DeleteIvalidData < ActiveRecord::Migration[5.2]
+class SyncIvalidUsers < ActiveRecord::Migration[5.2]
   def change
-    users = User.find_by_sql("select count(*) as user_count, login from users group by login having user_count>1")
+    users = User.where.not(id: 2).find_by_sql("select count(*) as user_count, login from users group by login having user_count>1")
     users.each do |user|
       valid_users = User.where(login: user.login)
       valid_users.each do |valid_user|
@@ -10,7 +10,7 @@ class DeleteIvalidData < ActiveRecord::Migration[5.2]
       end
     end
 
-    mail_users = User.find_by_sql("select count(*) as user_count, mail from users where mail is not null group by mail having user_count>1")
+    mail_users = User.where.not(id: 2).find_by_sql("select count(*) as user_count, mail from users where mail is not null group by mail having user_count>1")
     mail_users.each do |mail_user|
       valid_mail_users = User.where(mail: mail_user.mail)
       valid_mail_users.each do |valid_mail_user|
@@ -21,7 +21,7 @@ class DeleteIvalidData < ActiveRecord::Migration[5.2]
     end
 
 
-    phone_users = User.find_by_sql("select count(*) as user_count, phone from users where phone is not null group by phone having user_count>1")
+    phone_users = User.where.not(id: 2).find_by_sql("select count(*) as user_count, phone from users where phone is not null group by phone having user_count>1")
     phone_users.each do |phone_user|
       valid_phone_users = User.where(phone: phone_user.phone)
       valid_phone_users.each do |valid_phone_user|