数据未被推入 mysql table

Question

connection.query("SELECT email, password FROM authenticate where email=?", email,
    function (error, result) {
      if (error) {
        throw error;
      } else {
        if (result.length == 0) {
          console.log('name not available');
          res.sendFile(path.join(__dirname + "/public/applyFailure.html"));
        } else if (result[0].password == password) {
          console.log(userData);
          connection.query("INSERT INTO userapplications SET ? ", userData,
            function (error, result, fields) {
              if (error){
                throw error;
              } 
              else{
                console.warn("insertion successful");
                res.sendFile(path.join(__dirname + "/public/applySuccess.html"));
              }   
            });
        } else {
          console.log('invalid user and password');
          res.sendFile(path.join(__dirname + "/public/apply.html"))
        }
      }
    });
  connection.end();

错误：

Cannot enqueue Query after invoking quit.

由于某种原因，数据库已连接，数据未添加到 table。我是初学者。

Answer 1

我认为这是因为 NodeJS 的异步特性。尝试将 connection.end() 与 connection.query() 连接起来。

喜欢：

connection.query("your_code_here).end();

Answer 2

像下面这样移动你的 connection.end(); 内部回调。

connection.query("SELECT email, password FROM authenticate where email=?", email,
    function (error, result) {
      if (error) {
        connection.end();
        throw error;
      } else {
        if (result.length == 0) {
          console.log('name not available');
          res.sendFile(path.join(__dirname + "/public/applyFailure.html"));
        } else if (result[0].password == password) {
          console.log(userData);
          connection.query("INSERT INTO userapplications SET ? ", userData,
            function (error, result, fields) {
              if (error){
                connection.end();
                throw error;
              } 
              else{
                console.warn("insertion successful");
                res.sendFile(path.join(__dirname + "/public/applySuccess.html"));
                connection.end();
              }   
            });
        } else {
          console.log('invalid user and password');
          res.sendFile(path.join(__dirname + "/public/apply.html"))
          connection.end();
        }
      }
    });
  connection.end();

类似这样，你可以修改。

数据未被推入 mysql table

the data is not pushed into mysql table

mysql

mysql-error-1064

node.js

express