Add ExpressError

EXPRESSERROR.JS IS CREATED IN UTILS FOLDER

class ExpressError extends Error {

  constructor(statusCode, message) {

    super();

    this.statusCode = statusCode;

    this.message = message;

  }

}

module.exports = ExpressError;

 IN APP.JS

const ExpressError = require("./utils/ExpressError.js");

(*) FOR EVERY INVALID REQUEST:

 

app.all("*",(req,res,next)=>{

  next(new ExpressError(404,"Page not Found!?"));

})

app.use((err, req, res, next) => {

  let { statusCode = 500, message = "something went wrong" } = err;

  res.status(statusCode).send(message);

});

HERE WHILE CREATING NEW LISTING, IF NO CONTENT IS ADDED INTO THE FIELDS WE CAN MANIPULATE THE ERRORS.

app.post(

  "/listings",

  wrapAsync(async (req, res, next) => {

    if(!req.body.listing){

throw new ExpressError(400,"send valid data!")

    }

    const newListing = new Listing(req.body.listing);

    await newListing.save();

    res.redirect("/listings");

  })

);

SAME WHILE UPDATING

// UPDATE ROUTE

app.put("/listings/:id", wrapAsync(async (req, res) => {

  if(!req.body.listing){

    throw new ExpressError(400,"send valid data!")

        }

  let { id } = req.params;

  await Listing.findByIdAndUpdate(id, { ...req.body.listing });

  res.redirect(`/listings/${id}`);

}));