chore: relocate backend into apps/api ahead of monorepo merge

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-27 00:12:54 +08:00 · 2026-08-24 12:20:40 +08:00
parent af44598df6
commit eaa6d2276a
388 changed files with 0 additions and 13998 deletions
@@ -0,0 +1,81 @@
+'use strict';
+
+// Generalizes `products` from Course-only (`course_id`) to a polymorphic
+// target (`purchasable_type` + `purchasable_id`) so standalone Units and
+// Lessons can also be sold individually, alongside plan-tier gating — see
+// utils/purchasable.util.js for the resolver used by every consumer.
+//
+// purchasable_type is STRING + explicit CHECK, not a real ENUM (CockroachDB
+// can't create a new enum type via addColumn the way createTable can — same
+// caveat as 20270101000076-add-assets-transcode-status.js).
+//
+// Dropping `course_id` also drops its FK (`onDelete: 'CASCADE'` from
+// 20270101000019-create-products.js) — referential integrity across the three
+// possible targets is now enforced at the application layer only, same as
+// course_purchases.product_id already is today.
+//
+// Touches a table with live production rows (real courses have real
+// products/course_purchases). NOT auto-run — test against a local/staging
+// copy of the DB first; do not execute against the shared dev/prod database
+// without explicit confirmation.
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.addColumn('products', 'purchasable_type', {
+      type: Sequelize.STRING(10),
+      allowNull: false,
+      defaultValue: 'course',
+    });
+
+    await queryInterface.addConstraint('products', {
+      fields: ['purchasable_type'],
+      type: 'check',
+      name: 'check_products_purchasable_type',
+      where: { purchasable_type: { [Sequelize.Op.in]: ['course', 'unit', 'lesson'] } },
+    });
+
+    await queryInterface.addColumn('products', 'purchasable_id', {
+      type: Sequelize.BIGINT,
+      allowNull: true, // filled by the backfill below, then locked to NOT NULL
+    });
+
+    await queryInterface.sequelize.query(`
+      UPDATE products SET purchasable_type = 'course', purchasable_id = course_id;
+    `);
+
+    await queryInterface.changeColumn('products', 'purchasable_id', {
+      type: Sequelize.BIGINT,
+      allowNull: false,
+    });
+
+    await queryInterface.removeIndex('products', ['course_id']);
+    await queryInterface.removeColumn('products', 'course_id');
+
+    await queryInterface.addIndex('products', ['purchasable_type', 'purchasable_id'], {
+      name: 'products_purchasable_type_id',
+    });
+  },
+
+  async down(queryInterface, Sequelize) {
+    await queryInterface.removeIndex('products', 'products_purchasable_type_id');
+
+    await queryInterface.addColumn('products', 'course_id', {
+      type: Sequelize.BIGINT,
+      allowNull: true,
+    });
+
+    await queryInterface.sequelize.query(`
+      UPDATE products SET course_id = purchasable_id WHERE purchasable_type = 'course';
+    `);
+
+    await queryInterface.changeColumn('products', 'course_id', {
+      type: Sequelize.BIGINT,
+      allowNull: false,
+    });
+
+    await queryInterface.addIndex('products', ['course_id']);
+
+    await queryInterface.removeColumn('products', 'purchasable_id');
+    await queryInterface.removeConstraint('products', 'check_products_purchasable_type');
+    await queryInterface.removeColumn('products', 'purchasable_type');
+  },
+};