add: ver()

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

models/courses/lessons.mdl.js

@@ -1,17 +1,17 @@
 const { DataTypes } = require("sequelize");
 const sequelize = require("../../config/db.config");
 
+// Standalone entity — no unit_id / order_index here. A Lesson is attached to
+// zero or more Units through unit_lessons, where per-unit ordering lives.
 const Lesson = sequelize.define("Lesson", {
   lesson_id: { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true, hidden: true, order: 0 },
   uuid: { type: DataTypes.UUID, defaultValue: DataTypes.UUIDV4, allowNull: false, unique: true, hidden: true, order: 0 },
-  unit_id: { type: DataTypes.BIGINT, allowNull: false, hidden: true, order: 0 },
 
   title: { type: DataTypes.STRING(255), allowNull: false, label: "Title", hidden: false, order: 1 },
   description: { type: DataTypes.TEXT, allowNull: true, label: "Description", hidden: false, order: 2 },
 
   duration_seconds: { type: DataTypes.INTEGER, allowNull: true, defaultValue: 0 }, // computed from blocks on save
-  
-  order_index: { type: DataTypes.INTEGER, allowNull: false, defaultValue: 0, label: "Order", hidden: false, order: 3 },
+
   createdBy: { type: DataTypes.BIGINT, allowNull: true, label: "Created By" },
   updatedBy: { type: DataTypes.BIGINT, allowNull: true, label: "Updated By" },
   deletedBy: { type: DataTypes.BIGINT, allowNull: true, label: "Deleted By" },
@@ -21,10 +21,8 @@ const Lesson = sequelize.define("Lesson", {
   paranoid: true,
   indexes: [
     { fields: ["uuid"] },
-    { fields: ["unit_id"] },
-    { fields: ["order_index"] },
     { fields: ["deletedAt"] },
   ],
 });
 
-module.exports = Lesson;
+module.exports = Lesson;