85 lines
2.5 KiB
JavaScript
85 lines
2.5 KiB
JavaScript
'use strict';
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/** @type {import('sequelize-cli').Migration} */
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module.exports = {
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async up(queryInterface, Sequelize) {
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await queryInterface.createTable('quiz_session_questions', {
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id: {
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type: Sequelize.CHAR(36),
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primaryKey: true,
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allowNull: false,
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comment: 'UUID primary key'
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},
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quiz_session_id: {
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type: Sequelize.CHAR(36),
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allowNull: false,
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references: {
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model: 'quiz_sessions',
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key: 'id'
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},
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onUpdate: 'CASCADE',
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onDelete: 'CASCADE',
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comment: 'Foreign key to quiz_sessions table'
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},
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question_id: {
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type: Sequelize.CHAR(36),
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allowNull: false,
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references: {
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model: 'questions',
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key: 'id'
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},
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onUpdate: 'CASCADE',
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onDelete: 'CASCADE',
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comment: 'Foreign key to questions table'
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},
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question_order: {
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type: Sequelize.INTEGER.UNSIGNED,
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allowNull: false,
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comment: 'Order of question in the quiz (1-based)'
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},
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created_at: {
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type: Sequelize.DATE,
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allowNull: false,
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defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
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comment: 'Record creation timestamp'
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},
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updated_at: {
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type: Sequelize.DATE,
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allowNull: false,
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defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
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comment: 'Record last update timestamp'
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}
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}, {
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charset: 'utf8mb4',
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collate: 'utf8mb4_unicode_ci',
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comment: 'Junction table linking quiz sessions with questions'
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});
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// Add indexes
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await queryInterface.addIndex('quiz_session_questions', ['quiz_session_id'], {
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name: 'idx_qsq_session_id'
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});
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await queryInterface.addIndex('quiz_session_questions', ['question_id'], {
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name: 'idx_qsq_question_id'
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});
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await queryInterface.addIndex('quiz_session_questions', ['question_order'], {
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name: 'idx_qsq_question_order'
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});
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// Unique composite index to prevent duplicate questions in same session
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await queryInterface.addIndex('quiz_session_questions', ['quiz_session_id', 'question_id'], {
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name: 'idx_qsq_session_question',
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unique: true
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});
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console.log('✅ Quiz session questions junction table created with 5 fields and 4 indexes');
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},
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async down(queryInterface, Sequelize) {
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await queryInterface.dropTable('quiz_session_questions');
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console.log('✅ Quiz session questions table dropped');
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}
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};
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