How do I send response object from my get request to the front end with Express and Axios? - express

Question

I am trying to pull data from MongoDB to populate some timers in this app I'm building. However, I can't seem to send my response to the front end with Axios. Here is my route on the backend:
const express = require('express');
const router = express.Router();
const TimerModel = require('../models/Timer');
router.get('/', async (req, res) => {
try {
const timers = await TimerModel.find({});
console.log('Succesful get req', timers);
res.send(timers);
} catch (err) {
console.log(err.message);
res.status(500).send('Server Error');
}
});
module.exports = router;
My console.log in the try statement prints the correct data but I'm having issues with sending it to the front end. Here is the component:
import React, { useState, useEffect } from 'react';
import Timer from '../Timer/Timer';
import axios from 'axios';
import './Wrapper.css';
function Wrapper() {
//State effects
useEffect(() => {
axios
.get('/')
.then((res) => {
console.log(res);
console.log(res.data);
})
.catch((err) => {
console.log(err);
});
});
const handleChange = (event) => {
setTitle(event.target.value);
};
const addTimer = () => {
const timer = <Timer title={title} key={timers.length} />;
let allTimers = timers.slice();
allTimers.push(timer);
setTimers(allTimers);
setTitle('');
};
return (
//JSX Code
);
}
export default Wrapper;
In the axios call I make, I get this weird object when I run console.log(res) and I get my index.html for the res.data. Why don't I have access to the timers object I made with my backend request? Isn't it being sent when I run the command res.send(timers) in my route?

Answer 1

You need to add your API url in axios request. Currently, axios is taking url of your React website that is why your response have index.html file of React website.
useEffect(() => {
axios
.get('api_url/')
.then((res) => {
console.log(res);
console.log(res.data);
})
.catch((err) => {
console.log(err);
});
});

Answer 2

You can save the result in a state like
`````````````
`````````````
const [time, setTimer] = useState(null)
useEffect(() => {
axios.get('/').then(res => setTimer(res.data)
}, [])
`````````````
`````````````
and then use time vairable where you want