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competition-website/database/migrations/005-create-exam-submissions.js

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'use strict';
/**
* 迁移文件:创建答题记录表(exam_submissions)
* 存储选手的试卷答题记录
*/
module.exports = {
up: async (queryInterface, Sequelize) => {
const { INTEGER, TEXT, DATE } = Sequelize;
await queryInterface.createTable('exam_submissions', {
id: {
type: INTEGER,
primaryKey: true,
autoIncrement: true,
allowNull: false,
comment: '答题记录唯一标识',
},
contestant_id: {
type: INTEGER,
allowNull: false,
comment: '选手 ID',
references: {
model: 'contestants',
key: 'id',
},
onUpdate: 'CASCADE',
onDelete: 'CASCADE',
},
answers: {
type: TEXT,
allowNull: false,
comment: '答题内容(JSON)',
},
submit_time: {
type: DATE,
allowNull: false,
comment: '提交时间',
},
score: {
type: INTEGER,
allowNull: true,
defaultValue: null,
comment: '试卷得分',
},
created_at: {
type: DATE,
allowNull: false,
comment: '创建时间',
},
updated_at: {
type: DATE,
allowNull: false,
comment: '更新时间',
},
});
await queryInterface.addIndex('exam_submissions', ['contestant_id'], {
name: 'idx_exam_submissions_contestant_id',
});
},
down: async (queryInterface) => {
await queryInterface.dropTable('exam_submissions');
},
};