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42 lines
2.2 KiB
JavaScript
42 lines
2.2 KiB
JavaScript
'use strict';
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const { DataTypes } = require('sequelize');
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const sequelize = require('../../config/db.config');
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const { Course } = require('./courses.mdl');
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const Unit = require('./units.mdl');
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const Lesson = require('./lessons.mdl');
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// Polymorphic target — a product is sold against exactly one Course, Unit, or
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// Lesson (purchasable_type + purchasable_id), not just courses. See
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// utils/purchasable.util.js for the type -> model/checkout-path resolver used
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// by every consumer (access checks, admin CRUD, checkout).
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//
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// constraints: false below because purchasable_id doesn't point at a single
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// table — referential integrity across the three possible targets is
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// enforced at the application layer only (see
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// 20270101000078-generalize-products-purchasable.js).
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const mdl_Product = sequelize.define('Product', {
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id: { type: DataTypes.BIGINT, primaryKey: true, autoIncrement: true },
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purchasable_type: { type: DataTypes.STRING(10), allowNull: false, defaultValue: 'course' },
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purchasable_id: { type: DataTypes.BIGINT, allowNull: false },
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name: { type: DataTypes.STRING(200), allowNull: false },
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description: { type: DataTypes.TEXT, allowNull: true },
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price: { type: DataTypes.DECIMAL(10, 2), allowNull: false },
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currency: { type: DataTypes.STRING(10), allowNull: false, defaultValue: 'USD' },
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access_days: { type: DataTypes.INTEGER, allowNull: true },
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is_active: { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: true },
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}, {
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tableName: 'products',
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timestamps: true,
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paranoid: true,
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});
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// Scoped hasOne per target type — Sequelize automatically adds the matching
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// purchasable_type filter to the join, so existing
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// `include: [{ model: mdl_Product, as: 'product' }]` call sites on Course
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// keep working unchanged.
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Course.hasOne(mdl_Product, { foreignKey: 'purchasable_id', constraints: false, scope: { purchasable_type: 'course' }, as: 'product' });
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Unit.hasOne(mdl_Product, { foreignKey: 'purchasable_id', constraints: false, scope: { purchasable_type: 'unit' }, as: 'product' });
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Lesson.hasOne(mdl_Product, { foreignKey: 'purchasable_id', constraints: false, scope: { purchasable_type: 'lesson' }, as: 'product' });
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module.exports = mdl_Product;
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