ERROR Getting an Unhandled Promise Rejection (id: 21): TypeError: undefined is not an object (evaluating 'res.json'). Any suggestions on fixing this issue in my code? I've checked the logs for user and loggeduserobj, and they seem to be correct. However, I'm still encountering this error. I also verified the type of loggeduserobj and it shows as an object. Can someone assist me in resolving this problem?
const { user } = route.params;
const [issameuser, setIssameuser] = useState(false)
const [follow, SetFollow] = useState(false)
const isMyProfile = async (otherprofile) => {
AsyncStorage.getItem('user').then((loggeduser) => {
const loggeduserobj = JSON.parse(loggeduser)
if (loggeduserobj.user.username == otherprofile[0].username) {
setIssameuser(true)
}
else {
setIssameuser(false)
}
})
}
const CheckFollow = async (otherprofile) => {
AsyncStorage.getItem('user')
.then(loggeduser => {
const loggeduserobj = JSON.parse(loggeduser);
fetch('http://10.0.2.2:3000/checkfollow', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
followfrom : loggeduserobj.user.username, followto: otherprofile[0].username
})
})
})
.then(res => res.json())
.then(data => {
if (data.message == "User in following list") {
SetFollow(true)
}
else if (data.message == "User not in following list") {
SetFollow(false)
}
else {
alert('Please Try Again!')
}
})
}
useEffect(() => {
isMyProfile(user)
CheckFollow(user)
}, [])
Backend:
router.post('/checkfollow', (req, res) => {
const { followfrom, followto } = req.body;
console.log(followfrom, followto);
if (!followfrom || !followto) {
return res.status(422).json({ error: "Invalid Credentials" });
}
User.findOne({ username: followfrom })
.then(mainuser => {
if (!mainuser) {
return res.status(422).json({ error: "Invalid Credentials" });
}
else {
let data = mainuser.following.includes(followto);
console.log(data);
if (data == true) {
res.status(200).send({
message: "User in following list"
})
}
else {
res.status(200).send({
message: "User not in following list"
})
}
}
})
.catch(err => {
return res.status(422).json({ error: "Server Error" });
})
})