update

models/GradeHistory.js

@@ -0,0 +1,21 @@
+const { DataTypes } = require('sequelize');
+const { sequelize } = require('../config/database');
+
+const GradeHistory = sequelize.define('grade_histories', {
+  id: { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, primaryKey: true },
+  grade_id: { type: DataTypes.UUID, allowNull: false },
+  student_id: { type: DataTypes.UUID, allowNull: false },
+  old_score: { type: DataTypes.DECIMAL(5, 2) },
+  new_score: { type: DataTypes.DECIMAL(5, 2) },
+  changed_by: { type: DataTypes.UUID },
+  change_reason: { type: DataTypes.TEXT },
+  changed_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
+  created_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
+  updated_at: { type: DataTypes.DATE, allowNull: false, defaultValue: DataTypes.NOW },
+}, {
+  tableName: 'grade_histories',
+  timestamps: true,
+  underscored: true,
+});
+
+module.exports = GradeHistory;