I am trying to get return an mysql data using promises and it works, but when I try to create an error in mysql on purpose but then I am getting this error .
(node:28464) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Users not found
(node:28464) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
I checked everywhere and it says to use .catch but its odd that I am using catch but cannot figure out the problem. Normally I would like to know how to solve this instead of just continuing without knowing the right way.
This is the model..
getAllUser =
new Promise((resolve, reject) => {
db.query('SELECT * from users', function (error, results, fields) {
if (error){
return reject('Users not found');
}else{
resolve(results[0]);
}
});
});
module.exports = {
getAllUser
};
And here is how I am calling the model, the model in the top should return an error since the mysql table is called user
not users
.
router.get('/db',(req,res,next)=>{
getAllUser.then((result)=>{
console.log(result);
}).catch((e) => {
console.log(e);
});
});
You have error in your model file. Function which return promise should be created instead Promise.
Working code:
Model:
getAllUser = () => new Promise((resolve, reject) => {
db.query('SELECT * from users', function (error, results, fields) {
if (error){
return reject('Users not found');
}else{
resolve(results[0]);
}
});
});
module.exports = {
getAllUser
};
Router:
router.get('/db',(req,res,next)=>{
getAllUser.then((result)=>{
console.log(result);
}).catch((e) => {
console.log(e);
});
});
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