TASK OF CODE : TO SAVE USER DATA INTO DB LIKE WE ARE REGISTERING THE NEW USER IN APP.
PROBLEM : DATA GETTING SAVE BUT GETTING "400 BAD REQUEST" AND ERROR IN CONSOLE
ERROR : "Can't save() the same doc multiple times in parallel"
CODE (GENERATING JWT TOKEN AND SAVING INTO DATABASE)
userSchema.methods.generateAuthToken=async function(){
const user=this;
// console.log(user);
const token=jwt.sign({_id:user._id.toString()},'helloworld');
user.tokens=user.tokens.concat({token});
await user.save();
return token;
}
CODE (ROUTER FILE)
router.post('/users',async(req,res)=>{
const user=new User(req.body);
const token=user.generateAuthToken();
try{
await user.save();
res.status(201).send({user,token});
}
catch(err){
console.log(err);
res.status(400).send(err);
}
// console.log(req.body);
})
The problem occurs when I am adding "const token" line and " res.status(201).send({user,token});"
Your error is pretty obviouse. You just have to read the error messages:
ERROR : "Can't save() the same doc multiple times in parallel"
The thing is, that user.generateAuthToken() is an async task that includes await user.save()
You need to await it aswell:
const token = await user.generateAuthToken();
Maybe you remove one of the user.save(). I guess its not the best idea to save the user twice per request