JSON POST requests empty response on Node/Mongo - node.js

Question

Edit: I solved it. It was pretty simple, I had imported the routes before setting app.use for body-parser, so it didn't knew hot to parse JSON and thus returned an undefined body.
I'm trying to make a REST API following a tutorial. I made everything exactly as it was done in it, and tried every fix I could think of, but I can't make JSON POST requests work.
After sending a request I'm supposed to get a JSON like this:
{
"_id": "a13d1s2bc12as3a2",
"name": "Name",
"desc": "bla bla",
"_v": 0
}
But instead I'm only getting a 201 Resource with an empty body. Not even an empty object, just nothing.
I tried all the possible configurations in Postman and also HTTPie.
I also tried the suggested fixes changing body-parser config, since I got a clue something was deprecated or changed in the last months (json, urlencoded, etc.)
I checked if Mongoose was connected to the DB using the function it has for checking it (it was).
I have no clue where's the problem.
This is the index:
const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const meals = require("./routes/meals");
const orders = require("./routes/orders");
const app = express();
mongoose.connect(process.env.MONGODB_URI, { useNewUrlParser: true, useUnifiedTopology: true });
app.use("/meals", meals);
app.use("/orders", orders);
app.use(express.json());
app.use(bodyParser.json({ type: 'application/json' }));
module.exports = app;
The routes for Meals:
const express = require("express");
const Meals = require("../models/Meals");
const router = express.Router();
router.get("/", (req, res) => {
Meals.find()
.exec()
.then(x => res.status(200).send(x));
});
router.get("/:id", (req, res) => {
Meals.findById(req.params.id)
.exec()
.then(x => res.status(200).send(x));
router.post("/", (req, res) => {
Meals.create(req.body)
.then(x => res.status(201).send(x));
});
router.put("/:id", (req, res) => {
Meals.findOneAndUpdate(req.params.id, req.body)
.then(x => res.sendStatus(204));
});
router.delete("/:id", (req, res) => {
Meals.findOneAndDelete(req.params.id)
.exec()
.then(() => res.sendStatus(204));
});
module.exports = router;
And the model:
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const Meals = mongoose.model("Meal", new Schema({
name: String,
desc: String
}));
module.exports = Meals;
Thank you.

Answer 1

To debug try this
const handleError = function() {
console.error(err);
// handle your error
};
router.post("/", (req, res) => {
Meals.create(req.body, function (err, req.body) {
if (err) return handleError(err);
})
});
You can also try to just provide static data for testing and see if that works, like :
const meal = new Meals({ name: 'some meal',desc: 'some desc' });
meal.save(function (err) {
if (err) return handleError(err);
// saved! return 200 or whatever you needs to do here
});

Answer 2

I solved it. It was pretty simple, I had imported the routes before setting app.use for body-parser, so it didn't knew hot to parse JSON and thus returned an undefined body.
app.use(bodyParser.json());
app.use("/meals", meals);
app.use("/orders", orders);
module.exports = app;