Question

我正在端口3000上编写服务器，其工作是从“ Signup.ejs”输入的值中获取数据，然后将其插入数据库中。

一切都很好，但是有一个问题，它告诉我TechnoBoy是Field list

中的未知列

我尝试在$ {}周围插入“”甚至“”，但是由于出现了新的错误，所以效果不佳。

这是我的Connection.js文件，我用它来创建连接，然后将其导出以将其连接到应用程序的文件中：

let mysql = require("mysql");
let connection = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "something",
  database: "test"
});

module.exports = connection;

这是我的Server.js，我用它来创建服务器并连接到数据库，然后将数据插入其中：

let connection = require("./Connection.js");
let bodyParser = require("body-parser");
let express = require("express");
let app = express();
let urlencodedParser = bodyParser.urlencoded({ extended: false });
app.listen(3000, function() {
  console.log("The server at port 3000 is open!");
});
app.set("view engine", "ejs");
app.get("/Signup", (req, res) => {
  res.render("Register");
});
connection.connect();
app.post("/Signup", urlencodedParser, function(req, res) {
  console.log(req.body);
  res.render("Register");
  connection.query(
    `insert into users (Username, User_Password) values (${
      req.body.Username
    }, ${req.body.Password})`
  );
});

将一些数据插入输入字段时收到错误：

Error: ER_BAD_FIELD_ERROR: Unknown column 'TechnoBoy' in 'field list'
    at Query.Sequence._packetToError (C:\Users\ha\node_modules\mysql\lib\protocol\sequences\Sequence.js:47:14)
    at Query.ErrorPacket (C:\Users\ha\node_modules\mysql\lib\protocol\sequences\Query.js:77:18)
    at Protocol._parsePacket (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:278:23)
    at Parser.write (C:\Users\ha\node_modules\mysql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:38:16)
    at Socket.<anonymous> (C:\Users\ha\node_modules\mysql\lib\Connection.js:91:28)
    at Socket.<anonymous> (C:\Users\ha\node_modules\mysql\lib\Connection.js:502:10)
    at Socket.emit (events.js:182:13)
    at addChunk (_stream_readable.js:283:12)
    at readableAddChunk (_stream_readable.js:264:11)
    --------------------
    at Protocol._enqueue (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:144:48)
    at Connection.query (C:\Users\ha\node_modules\mysql\lib\Connection.js:200:25)
    at C:\Users\ha\OneDrive\Images\Documents\Projects\UI-Server\Server.js:17:14
    at Layer.handle [as handle_request] (C:\Users\ha\node_modules\express\lib\router\layer.js:95:5)
    at next (C:\Users\ha\node_modules\express\lib\router\route.js:137:13)
    at C:\Users\ha\node_modules\body-parser\lib\read.js:130:5
    at invokeCallback (C:\Users\ha\node_modules\raw-body\index.js:224:16)
    at done (C:\Users\ha\node_modules\raw-body\index.js:213:7)
    at IncomingMessage.onEnd (C:\Users\ha\node_modules\raw-body\index.js:273:7)
    at IncomingMessage.emit (events.js:182:13)
Emitted 'error' event at:
    at Connection._handleProtocolError (C:\Users\ha\node_modules\mysql\lib\Connection.js:425:8)
    at Protocol.emit (events.js:182:13)
    at Protocol._delegateError (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:390:10)
    at Query.<anonymous> (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:153:12)
    at Query.emit (events.js:182:13)
    at Query.Sequence.end (C:\Users\ha\node_modules\mysql\lib\protocol\sequences\Sequence.js:78:12)
    at Query.ErrorPacket (C:\Users\ha\node_modules\mysql\lib\protocol\sequences\Query.js:90:8)
    at Protocol._parsePacket (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:278:23)
    at Parser.write (C:\Users\ha\node_modules\mysql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\ha\node_modules\mysql\lib\protocol\Protocol.js:38:16)

我使用的查询（在connection.query btw中）：

insert into users (Username, User_Password) values (${
          req.body.Username
        }, ${req.body.Password})

如果这是一个愚蠢的问题，对不起，我对后端很陌生，这是我第一次尝试。

Answer 1

我是个白痴。我将“密码”字段配置为int，因此它无法输入字符串，但我向它传递了一个字符串，这就是为什么当我传递它时，它说的是错误的语法和内容。

哦，我也忘记了用“”来包装用户名，尽管我仍然不知道当属性本身是字符串时怎么回事。

问题已解决，现在可以关闭。

“字段列表”中的未知列“内容”出了什么问题？

1 个答案: