I was trying to make a CRUD app in Nodejs using MongoDB but when I wrote the update part and send the send using postman it's showing the error in the terminal that
**MongoServerError: Performing an update on the path '_id' would modify the immutable field '_id'**
Here's my code to update an entry bu _id in mongo db
router.put('/api/employee/edit/:id' ,(req,res) =>{
const emp = new Employee({
name:req.body.name,
email:req.body.email,
salary:req.body.salary
});
Employee.findByIdAndUpdate(req.params.id, {$set: emp},(err,data) => {
if(!err){
res.status(200).json({code:200,message:"Employee updated successfully",
updateEmployee:data
})
}
else{
console.log(err);
}
})
})
I’m assuming giving the whole object as an argument to $set means it will try to modify all properties of it, including _id which shouldn’t be modified and you haven’t set on the object. Try to specify the properties to modify separately:
Employee.findByIdAndUpdate(req.params.id, {$set: {
name:req.body.name,
email:req.body.email,
salary:req.body.salary
}},(err,data) => {
You are creating a new Employee document and wants update the current one with that new one. You can not do that since that will also try to override _id of the document. Instead of creating a new Employee document, you should just update existing one with new data:
router.put('/api/employee/edit/:id', (req, res) => {
Employee.findByIdAndUpdate(req.params.id, {
name: req.body.name,
email: req.body.email,
salary: req.body.salary
}, { new: true }, (err, data) => {
if (!err) {
res.status(200).json({ code: 200, message: "Employee updated successfully", updateEmployee: data })
} else {
res.status(400).json({ code: 400, message: "Employee updated failed." })
}
})
})