I have a web application built with Node.js using Express.js, and storing data in a MongoDB database with the help of Mongoose. My challenge is to handle a duplicate key error (error code 11000) from MongoDB while still returning a 204 HTTP response. I plan to achieve this by implementing a post hook on the save method, where I can capture and dismiss the error.
Service Layer
const createMyModel = (req, res, next) => {
MyModel.create({...data})
.then(createRes => res.status(204).send())
.catch(next)
}
Schema - Save Hook
MySchema.post('save', (err, res, next) => {
if (!err || (err.name === 'MongoError' && err.code === 11000)) {
// The code to handle the duplicate key error goes here
next();
} else {
next(err);
}
});