Question

我正在使用Koa模块 - 节点js和mysql＆amp;遇到了问题。在注册函数中（在welcomeCtrl.js内）

var bcrypt = require('bcrypt');
module.exports = {
signup: function* (next) {
 bcrypt.genSalt(10, function(err, salt) {
        console.log(salt);
        bcrypt.hash(password, salt, function(err, hash) {
            // Store hash in your password DB. 
            console.log(hash); //no error
            var hashedPassword = hash;
        });
       });
        console.log(bcrypt.hash.hash); //gives error
             //or
        console.log(bcrypt.hash.hahedPassword); //gives error

        queryString = "insert into user(email,name, phone, password, course_id, dpt_id) values('%s','%s','%s','%s','%s','%s')";
        query = util.format(queryString, email, name, phone, hash, courseId, dptId);
        results = yield databaseUtils.executeQuery(query);
        this.redirect('/');
    }
   }

我在不同的routes.js文件中调用signup post函数：

router.post('/signup', welcomeCtrl.signup);

这是databaseUtils.js文件中的executeQuerry函数

 var executeQuery = function(query, callback) {
 pool.getConnection(function(err, connection) {
    // Use the connection
    connection.query(query, function(err, rows, fields) {
        connection.release();
        if(err) {
            err.mysqlQuery = query;
            logger.logError(err);
        }

        if(typeof callback == "function") {
            callback(err, rows);
        }
        // Don't use the connection here, it has been returned to the pool.
    });
});
};
 module.exports = {
executeQuery: thunkify(executeQuery),
executePlainQuery: executeQuery
};

有没有办法在函数外部使用哈希变量，以便可以在查询中插入？

Answer 1

您应该将查询功能移动到bcrypt.hash的回调中。

bcrypt.genSalt(10, function(err, salt) {
      console.log(salt);

      bcrypt.hash(password, salt, function(err, hash) {
        // Store hash in your password DB. 
        console.log(hash); //no error
        queryString = "insert into user(email,name, phone, password, course_id, dpt_id) values('%s','%s','%s','%s','%s','%s')";
        query = util.format(queryString, email, name, phone, hash, courseId, dptId);

        databaseUtils.executeQuery(query, function() {
          this.redirect('/');
        });
      });
    });

问题是，redirect函数来自哪里？除非绑定函数，否则您将在this上放松上下文。胖箭头功能在您的设置中有效吗？如果是这样，你就可以这样做。

无法在函数外部使用变量

1 个答案: