feat: nested folders (#266)

backend/migrations/20250804175803-add-cascade-delete-parent-folder.js

@@ -0,0 +1,22 @@
+'use strict';
+
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface) {
+    await queryInterface.addConstraint('folders', {
+      fields: ['parentFolderId'],
+      type: 'foreign key',
+      name: 'fk_folders_parentFolderId',
+      references: {
+        table: 'folders',
+        field: 'id',
+      },
+      onDelete: 'CASCADE',
+      onUpdate: 'CASCADE',
+    });
+  },
+
+  async down(queryInterface) {
+    await queryInterface.removeConstraint('folders', 'fk_folders_parentFolderId');
+  },
+};

backend/models/folders.js

@@ -11,6 +11,11 @@ function defineFolder(sequelize, DataTypes) {
     parentFolderId: {
       type: DataTypes.INTEGER,
       allowNull: true,
+      references: {
+        model: 'folder',
+        key: 'id',
+      },
+      onDelete: 'CASCADE',
     },
     projectId: {
       type: DataTypes.INTEGER,
@@ -25,6 +30,7 @@ function defineFolder(sequelize, DataTypes) {
 
   Folder.associate = (models) => {
     Folder.belongsTo(models.Project, { foreignKey: 'projectId', onDelete: 'CASCADE' });
+    Folder.belongsTo(models.folder, { foreignKey: 'parentFolderId', onDelete: 'CASCADE' });
     Folder.hasMany(models.Case, { foreignKey: 'folderId' });
   };