I'm trying to create a register/login system
and I want when the user tries to register with an existing email to have a flash message saying that email already exist but that message does not show app here's the code :
registerController.js:
const {validationResult} = require('express-validator');
const userController = require('./user.controller');
let getRegisterPage = (req ,res) =>{
return res.render('register.ejs' , {errors : req.flash("errors")});
};
let createNewUser = async (req , res) =>{
let errorArr = [];
let validationErrors = validationResult(req);
if(!validationErrors.isEmpty()){
let errors = Object.values(validationErrors.mapped());
errors.forEach((item) =>{
errorArr.push(item.msg);
});
req.flash("errors" , errorArr);
return res.redirect("/register");
}
try{
let newUser = {
username: req.body.username,
email: req.body.email,
password: req.body.password,
birthday: req.body.birthday
};
return await userController.createNewUser(newUser);
// return res.redirect("/login");
}catch(e){
req.flash( "error" , e );
console.log("error cathced!");
return res.redirect("/register");
}
};
module.exports = {
getRegisterPage : getRegisterPage,
createNewUser : createNewUser
};
user.controller.js :
const connection = require('../config/db.config');
let createNewUser = function(user){
return new Promise(async(resolve , reject)=>{
let emailCheck = await checkExistEmail(user.email);
if(emailCheck){
reject("email already exists. please use another email");
console.log("email already exists. please use another email");
}else{
let userInfo = {
username: user.username,
email: user.email,
password : user.password,
birthday: user.birthday
};
connection.query("INSERT INTO users SET = ?" , userInfo , function(error , result){
if(error){
reject(error);
}else{
resolve("user created successfuly");
}
});
}
});
}
let checkExistEmail = (email) => {
return new Promise( (resolve, reject) => {
try {
connection.query('SELECT * FROM users WHERE email = ?', email,
function(err, rows) {
if (err) {
reject(err)
}
if (rows.length > 0) {
resolve(true)
} else {
resolve(false)
}
}
);
} catch (err) {
reject(err);
}
});
};
module.exports = {
createNewUser: createNewUser
};
all other error flash messages appear except for this one that I mentioned
also I get in the console "email already exists. please use another email" and "error cathced!" but that flash message is not showing up !!!
question from:
https://stackoverflow.com/questions/65841367/a-flash-message-is-not-showing-up 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…