68 lines
2 KiB
JavaScript
68 lines
2 KiB
JavaScript
'use strict';
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const {
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safeAddColumns,
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safeAddIndex,
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safeRemoveColumn,
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} = require('../utils/migration-utils');
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module.exports = {
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async up(queryInterface, Sequelize) {
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// Add order column to tasks table for subtask ordering
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await safeAddColumns(queryInterface, 'tasks', [
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{
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name: 'order',
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definition: {
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type: Sequelize.INTEGER,
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allowNull: true,
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defaultValue: null,
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comment: 'Order position for subtasks within a parent task',
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},
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},
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]);
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// Add index on parent_task_id and order for efficient subtask queries
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await safeAddIndex(
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queryInterface,
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'tasks',
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['parent_task_id', 'order'],
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{
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name: 'tasks_parent_task_id_order',
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}
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);
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// Populate order field for existing subtasks based on created_at
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await queryInterface.sequelize.query(`
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UPDATE tasks
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SET "order" = subquery.row_num
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FROM (
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SELECT id,
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ROW_NUMBER() OVER (
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PARTITION BY parent_task_id
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ORDER BY created_at ASC
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) as row_num
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FROM tasks
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WHERE parent_task_id IS NOT NULL
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) AS subquery
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WHERE tasks.id = subquery.id
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`);
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},
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async down(queryInterface) {
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// Remove the index
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const indexes = await queryInterface.showIndex('tasks');
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const indexExists = indexes.some(
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(index) => index.name === 'tasks_parent_task_id_order'
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);
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if (indexExists) {
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await queryInterface.removeIndex(
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'tasks',
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'tasks_parent_task_id_order'
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);
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}
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// Remove the order column using safe utility
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await safeRemoveColumn(queryInterface, 'tasks', 'order');
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},
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};
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