处理无效的数据

db/migrate/20190621105144_sync_ivalid_users.rb

@@ -1,34 +1,34 @@
-class DeleteIvalidData < 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.each do |user|
-      valid_users = User.where(login: user.login)
-      valid_users.each do |valid_user|
-        unless valid_user.lastname.present?
-          valid_user.delete
-        end
-      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.each do |mail_user|
-      valid_mail_users = User.where(mail: mail_user.mail)
-      valid_mail_users.each do |valid_mail_user|
-        unless valid_mail_user.lastname.present?
-          valid_mail_user.delete
-        end
-      end
-    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.each do |phone_user|
-      valid_phone_users = User.where(phone: phone_user.phone)
-      valid_phone_users.each do |valid_phone_user|
-        unless valid_phone_user.lastname.present?
-          valid_phone_user.delete
-        end
-      end
-    end
-  end
-end
+class SyncIvalidUsers < ActiveRecord::Migration[5.2]
+  def change
+    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|
+        unless valid_user.lastname.present?
+          valid_user.delete
+        end
+      end
+    end
+
+    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|
+        unless valid_mail_user.lastname.present?
+          valid_mail_user.delete
+        end
+      end
+    end
+
+
+    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|
+        unless valid_phone_user.lastname.present?
+          valid_phone_user.delete
+        end
+      end
+    end
+  end
+end