app.post connection and middleware in nodejs - node.js

Question

app.post is not working on postman and showing result in not in JSON format and also middleware is showing error in postman what m doing wrong in this??
is there any new middleware code introduced recently??
// importing
import express from "express";
import mongoose from "mongoose";
import Messages from "./dbMessages.js";
//app config
const app = express();
const port = process.env.PORT || 9000;
//middleware
app.use(express.json());
//DB config
const connection_url =
"mongodb+srv://admin:0ZKon3XRmT0SWkal#cluster0.7pljv.mongodb.net/whatsappdb?retryWrites=true&w=majority";
mongoose.connect(connection_url, {
// useCreateIndex: true,
// useNewUrlParser: true,
// useUnifiedTopology: true,
});
//????
//api routes
app.get("/", (req, res) => res.status(200).send("hello world"));
app.post("/messages/new", (req, res) => {
const dbMessage = req.body;
Messages.create(dbMessage, (err, data) => {
if (err) {
res.status(500).send(err);
} else {
res.status(201).send(data);
}
});
});
//listen
app.listen(port, () => console.log(`Listening on localhost:${port}`));
dbmessages.js is given below
import mongoose from "mongoose";
const whatsappSchema = mongoose.Schema({
message: String,
name: String,
timestamp: String,
received: Boolean,
});
export default mongoose.model("messageContent", whatsappSchema);

Answer 1

You are not creating the instance of a model.
app.post("/messages/new", (req, res) => {
const dbMessage = req.body,
messageModel = new Messages();
message.Modelmessage = req.body.Modelmessage;
message.Modelname = req.body.Modelname;
messageModel.timestamp = req.body.timestamp;
messageModel.received = req.body.received;
messageModel.save().then(data => {
res.status(201).send(data);
}).catch((e) => {
res.status(500).send(err);
})
});