..

db/migrate/20190805004505_sync_index_to_users.rb

@@ -1,6 +1,6 @@
 class SyncIndexToUsers < ActiveRecord::Migration[5.2]
   def change
-    # add_index :users, :login, unique: true
+    add_index :users, :login, unique: true
     add_index :users, :mail, unique: true
     add_index :users, :phone, unique: true
   end

db/migrate/20190805061306_add_exec_time_to_evaluate_records.rb

@@ -0,0 +1,7 @@
+class AddExecTimeToEvaluateRecords < ActiveRecord::Migration[5.2]
+  def change
+    remove_columns :evaluate_records, :exec_time if User.first.attributes.include?("exec_time")
+
+    add_column :evaluate_records, :exec_time, :integer
+  end
+end