Initial commit: 宁夏智慧养殖监管平台
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shenquanyi
282
backend/scripts/seed-manager.js
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282
backend/scripts/seed-manager.js
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/**
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* 数据库种子数据管理器
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* @file seed-manager.js
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* @description 管理数据库种子数据，用于初始化和测试
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*/
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require('dotenv').config();
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const fs = require('fs');
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const path = require('path');
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const { sequelize } = require('../config/database-simple');
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const { QueryTypes } = require('sequelize');
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// 种子文件目录
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const SEEDS_DIR = path.join(__dirname, '../seeds');
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// 确保种子目录存在
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if (!fs.existsSync(SEEDS_DIR)) {
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fs.mkdirSync(SEEDS_DIR, { recursive: true });
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}
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// 创建种子记录表（如果不存在）
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async function createSeedTable() {
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await sequelize.query(`
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CREATE TABLE IF NOT EXISTS seeds (
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id INT AUTO_INCREMENT PRIMARY KEY,
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name VARCHAR(255) NOT NULL UNIQUE,
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applied_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
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);
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`);
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}
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// 获取已应用的种子
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async function getAppliedSeeds() {
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await createSeedTable();
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const seeds = await sequelize.query(
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'SELECT name FROM seeds ORDER BY id ASC',
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{ type: QueryTypes.SELECT }
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);
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return seeds.map(seed => seed.name);
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}
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// 获取所有种子文件
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function getAllSeeds() {
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return fs.readdirSync(SEEDS_DIR)
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.filter(file => file.endsWith('.js'))
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.sort(); // 按文件名排序
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}
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// 应用种子数据
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async function applySeed(seedName) {
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const seed = require(path.join(SEEDS_DIR, seedName));
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console.log(`正在应用种子数据: ${seedName}`);
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// 开始事务
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const transaction = await sequelize.transaction();
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try {
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// 执行种子的 up 方法
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await seed.up(sequelize.getQueryInterface(), sequelize);
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// 记录种子已应用
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await sequelize.query(
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'INSERT INTO seeds (name) VALUES (:name)',
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{
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replacements: { name: seedName },
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transaction
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}
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);
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// 提交事务
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await transaction.commit();
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console.log(`种子数据应用成功: ${seedName}`);
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} catch (error) {
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// 回滚事务
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await transaction.rollback();
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console.error(`种子数据应用失败: ${seedName}`, error);
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throw error;
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}
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}
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// 回滚种子数据
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async function revertSeed(seedName) {
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const seed = require(path.join(SEEDS_DIR, seedName));
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console.log(`正在回滚种子数据: ${seedName}`);
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// 开始事务
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const transaction = await sequelize.transaction();
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try {
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// 执行种子的 down 方法
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await seed.down(sequelize.getQueryInterface(), sequelize);
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// 删除种子记录
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await sequelize.query(
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'DELETE FROM seeds WHERE name = :name',
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{
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replacements: { name: seedName },
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transaction
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}
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);
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// 提交事务
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await transaction.commit();
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console.log(`种子数据回滚成功: ${seedName}`);
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} catch (error) {
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// 回滚事务
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await transaction.rollback();
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console.error(`种子数据回滚失败: ${seedName}`, error);
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throw error;
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}
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}
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// 运行所有种子数据
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async function runAllSeeds() {
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const appliedSeeds = await getAppliedSeeds();
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const allSeeds = getAllSeeds();
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// 找出未应用的种子
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const pendingSeeds = allSeeds.filter(
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seed => !appliedSeeds.includes(seed)
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);
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if (pendingSeeds.length === 0) {
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console.log('没有待处理的种子数据');
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return;
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}
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console.log(`发现 ${pendingSeeds.length} 个待处理的种子数据`);
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// 按顺序应用每个待处理的种子
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for (const seed of pendingSeeds) {
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await applySeed(seed);
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}
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console.log('所有待处理的种子数据已应用');
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}
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// 回滚所有种子数据
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async function revertAllSeeds() {
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const appliedSeeds = await getAppliedSeeds();
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if (appliedSeeds.length === 0) {
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console.log('没有可回滚的种子数据');
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return;
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}
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// 从最新的种子开始，回滚所有种子
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const seedsToRevert = [...appliedSeeds].reverse();
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for (const seed of seedsToRevert) {
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await revertSeed(seed);
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}
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console.log('所有种子数据已回滚');
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}
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// 创建新的种子文件
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function createSeed(name) {
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const timestamp = new Date().toISOString().replace(/[-:]/g, '').replace('T', '').split('.')[0];
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const fileName = `${timestamp}_${name}.js`;
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const filePath = path.join(SEEDS_DIR, fileName);
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const template = `/**
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* 种子数据: ${name}
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* 创建时间: ${new Date().toISOString()}
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*/
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'use strict';
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module.exports = {
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up: async (queryInterface, Sequelize) => {
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// 在此处添加种子数据
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// 例如:
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// await queryInterface.bulkInsert('users', [
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// {
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// username: 'admin',
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// email: 'admin@example.com',
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// password: '$2b$10$rVHMOB./a2mFmE4EEdI3QO4f./bN3LYb.dpDvtX9gRUM9gNwspj1a', // 123456
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// created_at: new Date(),
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// updated_at: new Date()
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// },
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// {
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// username: 'user',
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// email: 'user@example.com',
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// password: '$2b$10$rVHMOB./a2mFmE4EEdI3QO4f./bN3LYb.dpDvtX9gRUM9gNwspj1a', // 123456
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// created_at: new Date(),
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// updated_at: new Date()
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// }
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// ]);
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},
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down: async (queryInterface, Sequelize) => {
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// 在此处添加回滚代码
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// 例如:
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// await queryInterface.bulkDelete('users', null, {});
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}
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};
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`;
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fs.writeFileSync(filePath, template);
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console.log(`已创建种子文件: ${fileName}`);
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return fileName;
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}
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// 命令行接口
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async function main() {
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const args = process.argv.slice(2);
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const command = args[0];
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try {
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switch (command) {
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case 'create':
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if (!args[1]) {
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console.error('请提供种子名称');
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process.exit(1);
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}
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createSeed(args[1]);
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break;
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case 'run':
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await runAllSeeds();
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break;
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case 'revert':
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await revertAllSeeds();
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break;
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case 'status':
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const applied = await getAppliedSeeds();
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const all = getAllSeeds();
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console.log('已应用的种子数据:');
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applied.forEach(s => console.log(` - ${s}`));
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console.log('\n待处理的种子数据:');
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all.filter(s => !applied.includes(s))
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.forEach(s => console.log(` - ${s}`));
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break;
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default:
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console.log(`
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数据库种子数据管理器
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用法:
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node seed-manager.js <命令> [参数]
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命令:
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create <name> 创建新的种子文件
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run 应用所有待处理的种子数据
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revert 回滚所有种子数据
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status 显示种子数据状态
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`);
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}
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} catch (error) {
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console.error('种子数据操作失败:', error);
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process.exit(1);
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} finally {
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// 关闭数据库连接
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await sequelize.close();
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}
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}
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// 如果直接运行此脚本，则执行main函数
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if (require.main === module) {
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main().catch(err => {
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console.error('未处理的错误:', err);
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process.exit(1);
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});
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}
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module.exports = {
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createSeedTable,
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getAppliedSeeds,
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getAllSeeds,
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applySeed,
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revertSeed,
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runAllSeeds,
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revertAllSeeds,
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createSeed
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};
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