Ethan Ethan - 29 days ago 9
Node.js Question

Validation failed nodejs required field

I am creating creating a bookstore demo app in Node.js. I have ran into a little situation with the POST request for creating a genre. I've setup so the name of the genre must be required if not don't insert it to the database. But when I use Postman to POST to the url localhost:3000/api/genres with the JSON

{
"name": "TEST"
}


It throws an error

{
"error": "Genre validation failed"
}


When I remove the required field in the genreSchema it works but the name of the genre doesn't appear. Here is my code

Code:

genre.js

var mongoose = require("mongoose");


// Create a schema for genre
var Schema = mongoose.Schema;

var genreSchema = Schema({
name:{
type: String,
required: true
},
create_date:{
type: Date,
default: Date.now
}
});
var Genre = module.exports = mongoose.model("Genre", genreSchema);

// Methods

// get genres
module.exports.getGenres = function(callback, limit) {
Genre.find(callback).limit(limit);
};
// add a new genre
// TODO: Not working in Postman ValidationError
module.exports.addGenre = function(genre, callback) {
Genre.create(genre, callback);
};





app.js

var express = require("express");
var app = express();
var bodyParser = require("body-parser");
var mongoose = require("mongoose");
var Genre = require('./models/genre');
var Book = require('./models/book');
// Connect to mongoose
mongoose.connect("mongodb://localhost/bookstore");
var db = mongoose.connection;

app.get("/", function(req, res){
res.json({ error: "Please use /api/books or /api/genres" });
});

// GET /api/genres
app.get('/api/genres', function(req, res){
Genre.getGenres(function(err, genres){
if(err) {
res.json({error: err.message})
}
res.json(genres);
});
});
app.post('/api/genres', function(req, res){
var genre = req.body;
Genre.addGenre(genre, function(err, genre){
if(err) {
res.json({
error: err.message
})
}
res.json(genre);
});
});
// GET /api/books
app.get('/api/books', function(req, res){
Book.getBooks(function(err, books){
if(err) {
res.json({error: err.stack})
}
res.json(books);
});
});
// GET /api/book/:id
app.get('/api/book/:_id', function(req, res){
Book.getBookById(req.params._id, function(err, book){
if(err) {
res.json({error: err.message})
}
res.json(book);
});
});


app.listen(3000, function(){
console.log("Running on port 3000!")
});

Answer

Have you tried console.log(req.body); inside your post route? I don't think you've setup body-parser as middleware so req.body is coming in empty and therefore not sending anything to your Genre.addGenre method.