如何将MySQL与Sveltekit/NodeJS集成
对于NodeJS项目,我通常只遵循以下标准示例:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
user : 'me',
password : 'secret',
database : 'my_db'
});
connection.connect();
connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
if (error) throw error;
console.log('The solution is: ', results[0].solution);
});
connection.end();
Sveltekit不允许var mysql = require('mysql');
因此我尝试将其替换为import { mysql } from 'mysql';
这也不起作用。
不确定是否有人有这方面的经验,可以指导我理解我的错误。
解决方案
1.安装mysql2包
npm install --save mysql2
2.设置MySQL连接
lib/db/mysql.js
import mysql from 'mysql2/promise';
export const mysqlconn = await mysql.createConnection({
host: '<myhost>',
user: 'root',
password: 'mypassword',
database: 'mydatabase'
});
3.创建API端点
routes/api/read.js
import { mysqlconn } from '$lib/db/mysql';
export async function get() {
let results = await mysqlconn.query('SELECT * FROM mytable')
.then(function([rows,fields]) {
console.log(rows);
return rows;
});
return {
body: results
}
}
更新
哪个更好?是上面的代码还是这个代码?
1.安装mysql2包
npm install --save mysql2
2.设置MySQL连接
lib/db/mysql.js
import mysql from 'mysql2/promise';
let mysqlconn = null;
export function mysqlconnFn() {
if (!mysqlconn) {
mysqlconn = mysql.createConnection({
host: '<myhost>',
user: 'root',
password: 'mypassword',
database: 'mydatabase'
});
}
return mysqlconn;
}
3.创建API端点
routes/api/read.js
import { mysqlconnFn } from '$lib/db/mysql';
export async function get() {
let mysqlconn = await mysqlconnFn();
let results = await mysqlconn.query('SELECT * FROM mytable')
.then(function([rows,fields]) {
console.log(rows);
return rows;
});
return {
body: results
}
}
更新2
您还可以在hooks
中设置MySQL连接。
参考:https://github.com/sveltejs/kit/issues/1538#issuecomment-1002106271
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