怎么解决？ ER_BAD_FIELD_ERROR：“字段列表”中的未知列“ undefined”

Question

我正在尝试使用expressjs将表单数据插入到nodejs中的MySQL数据库中

当我在命令提示符下运行代码时，它运行良好，但是当我按下“提交”按钮时，出现以下错误：

<i class="material-icons"> list </i>

我在MySQL命令行中创建了一个表

var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password:'',
  database : 'test'
});

app.get("/", function(req, res){
        res.render("home");
});

//when I press submit button it should post the request and render a page to submit route with text "data saved!!" 

app.post("/submit", function(req, res){

  var q = "Insert into test (ID, name, crash1, crash2, crash3) VALUES (null, '" + req.body.ANR + "', " + req.body.crash1 + ", " + req.body.crash2 + ", " + req.body.crash3 +")";
  connection.query(q, function(err){
      if(err) throw err
      res.render("home", {message: 'data saved!!'});
  })
});

当我手动插入时它起作用了！

create table xyz(
    ID BIGINT AUTO_INCREMENT PRIMARY KEY NOT NULL, 
    name VARCHAR(100) NOT NULL, 
    crash1 BIGINT, 
    crash2 BIGINT, 
    crash3 BIGINT
);

我的错误看起来像这样

Answer 1

您要在代码中插入测试表：

var q = "Insert into test (ID, name, crash1, crash2, crash3) VALUES (null, '" + req.body.ANR + "', " + req.body.crash1 + ", " + req.body.crash2 + ", " + req.body.crash3 +")";

但是表名是xyz。您应该用xyz代替test，它应该可以工作。

并且不要在id中传递null，并且id不为null。

请将crash1，crash2，crash3转换为int值：

req.body.crash1 = parseInt(req.body.crash1);
req.body.crash2 = parseInt(req.body.crash2);
req.body.crash3 = parseInt(req.body.crash3);

应为：

var q = "Insert into xyz (name, crash1, crash2, crash3) VALUES ('" + req.body.ANR + "', " + req.body.crash1 + ", " + req.body.crash2 + ", " + req.body.crash3 +")";