add column to users

db/migrate/20200724085032_add_column_to_table_users.rb

@@ -0,0 +1,8 @@
+class AddColumnToTableUsers < ActiveRecord::Migration[5.2]
+  def change
+    add_column :users, :description, :string, default: ""
+    add_column :users, :sponsor_certification, :integer, default: 0
+    add_column :users, :sponsor_num, :integer, default: 0
+    add_column :users, :sponsored_num, :integer, default: 0
+  end
+end

db/structure.sql

@@ -55,7 +55,7 @@ CREATE TABLE `applied_contests` (
 -- ----------------------------
 -- Table structure for applied_messages
 -- ----------------------------
-DROP TABLE IF EXISTS `applied_messages`;
+DROP TABLE IF /home/qyzh/datadict.txtpplied_messages`;
 CREATE TABLE `applied_messages` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `user_id` int(11) DEFAULT NULL,