mongoDb database form-data empty response - node.js

Question

I am sending Rest POST Request(form-data) using postman to mongoDb. Even after providing all the key-value pairs in the Model, only the product _id gets stored into the database not other array of objects. Here's my model schema:
const mongoose = require('mongoose');
const productSchema = mongoose.Schema({
name: String,
price: Number,
editor1: String,
year: String,
quantity: Number,
subject: String,
newProduct: String,
relatedProduct: String,
//coverImage: { type: String, required: false }
});
module.exports = mongoose.model('Product', productSchema);
And here's my POST request for the products:
exports.products_create_product = (req, res, next) => {
const product = new Product(req.body);
product
.save()
.then(result => {
console.log(result);
res.status(201).json({
message: "Created product successfully",
createdProduct: {
name: result.name,
price: result.price,
_id: result._id,
request: {
type: "GET",
url: "http://localhost:3000/products/" + result._id
}
}
});
})
.catch(err => {
console.log(err);
res.status(500).json({
error: err
});
});
};
And this is my result output:
{
"message": "Created product successfully",
"createdProduct": {
"_id": "5b2df3420e8b7d1150f6f7f6",
"request": {
"type": "GET",
"url": "http://localhost:3000/products/5b2df3420e8b7d1150f6f7f6"
}
}
}
Tried every possible way to solve this but in vain.

Answer 1

try the callback
product.save((err,result) =>{
if(err){
res.status(500).json({
error: err
});
return false
}
res.status(201).json({
message: "Created product successfully",
createdProduct: {
name: result.name,
price: result.price,
_id: result._id,
request: {
type: "GET",
url: "http://localhost:3000/products/" + result._id
}
}
})

Answer 2

First let's try to understand why this happens ? ,
When you use .json() method inside this method it uses JSON.stringify() function what this function does is that take any JavaScript value and convert it to JSON string for example
let product = {
name : 'p1' ,
price : 200
}
console.log(JSON.stringify(product)); // {"name":"p1","price":200}
that's good , but you should know that if this function during the conversion see any undefined values it will be omitted ,
for example
let product = {
id:"23213214214214"
} // product doesn't have name property and its undefind
console.log(JSON.stringify({
id:product.id ,
name : product.name
})); // {"id":"23213214214214"}
if you look at the example above you'll see that because the value of name is **undefined ** you get a JSON output but only with the id value , and any value that is undefined will not be in the result .
that's the main reason why you get the result with only the product._id because other values like price and name are undefined .
so what to do to solve this problem ?
log the req.body and make sure that it has properties like name and price and I think this is the main reason of the problem because when you create the product variable it will only has the _id prop because other props are not exist .
after you create the product log it to the console and make sure that it has other properties like name and price

Answer 3

#mostafa yes I did tried.
{
"count": 3,
"products": [
{
"_id": "5b2e2d0cb70f5f0020e72cb6",
"request": {
"type": "GET",
"url": "https://aa-backend.herokuapp.com/products/5b2e2d0cb70f5f0020e72cb6"
}
},
{
"_id": "5b2e2d37b70f5f0020e72cb7",
"request": {
"type": "GET",
"url": "https://aa-backend.herokuapp.com/products/5b2e2d37b70f5f0020e72cb7"
}
},
{
this is the only output I am getting.