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我刚刚使用 nodejs 和 express 编写了一个简单的 http api 服务器。它包装 mysql 数据库，并返回其数据。

但是，对于我执行的每个查询，我的服务器都会崩溃。

我在一个名为“db_manager”的文件中创建池连接：

const mysql = require("mysql2/promise");
require("dotenv").config();

try{
    var pool = mysql.createPool({
        host: process.env.DB_HOST,
        user: process.env.DB_USER,
        database: process.env.DB_NAME,
        password: process.env.DB_PASSWORD,
    });
} catch (err){
    console.log(err)
}

module.exports = { pool };

然后我只是在我使用的各种文件中导入池。

const { pool } = require("./db_manager");
//code
var query = config.onlyOpened ? "SELECT * FROM `Deadlines` WHERE `private` = FALSE AND `closed` == FALSE" : "SELECT * FROM `Deadlines` WHERE `private` = FALSE";
const [rawResults, _] = await pool.execute(query);

它抛出了这个错误

~/Projects/MySQLExpress/node_modules/mysql2/lib/pool.js:177
        throw e;
        ^

TypeError: Bind parameters must not contain undefined. To pass SQL NULL specify JS null
    at ~/Projects/MySQLExpress/node_modules/mysql2/lib/connection.js:628:17
    at Array.forEach (<anonymous>)
    at PoolConnection.execute (~/Projects/MySQLExpress/node_modules/mysql2/lib/connection.js:620:22)
    at ~/Projects/MySQLExpress/node_modules/mysql2/lib/pool.js:172:14
    at ~/Projects/MySQLExpress/node_modules/mysql2/lib/pool.js:64:16
    at PoolConnection.<anonymous> (~/Projects/MySQLExpress/node_modules/mysql2/lib/connection.js:777:13)
    at Object.onceWrapper (events.js:422:26)
    at PoolConnection.emit (events.js:315:20)
    at ClientHandshake.<anonymous> (~/Projects/MySQLExpress/node_modules/mysql2/lib/connection.js:121:14)
    at ClientHandshake.emit (events.js:315:20)
[nodemon] app crashed - waiting for file changes before starting...
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1 回答 1

1

检查您的查询格式：

  1. 您正在使用==第一个 ( AND closed == FALSE)
  2. 使用0and1过滤布尔值
var query = config.onlyOpened ? 
    "SELECT * FROM `Deadlines` WHERE `private` = 0 AND `closed` = 0" : 
    "SELECT * FROM `Deadlines` WHERE `private` = 0";
于 2021-11-24T17:25:43.213 回答