Hi all, I’m new to learn MERN stack and node js. However, I have been struggling the mongoose error for a long while. Hopefully some can help me out! 
MongoDB is connected.
Here is the database.js .
const mongoose = require('mongoose');
const connectDatabase = async () => {
try {
await mongoose.connect(process.env.DB_LOCAL_URI, {
useNewUrlParser: true,
useUnifiedTopology: true,
});
console.log(`MongoDB Database connected with HOST: ${mongoose.connection.host}`);
} catch (error) {
console.error('MongoDB connection error:', error);
}
};
module.exports = connectDatabase;
Here’s the server.js:
const app = require('./app')
const connectDatabase = require('./config/database')
const dotenv = require('dotenv');
// Setting up config file
dotenv.config({ path: 'backend/config/config.env' })
// Connecting to database
connectDatabase();
app.listen(process.env.PORT, () => {
console.log(`Server started on PORT: ${process.env.PORT} in ${process.env.NODE_ENV} mode.`)
})
This is the model, prduct.js:
const mongoose = require('mongoose')
const productSchema = new mongoose.Schema({
name: {
type: String,
required: [true, 'Please enter product name'],
trim: true,
maxLength: [100, 'Product name cannot exceed 100 characters']
},
price: {
type: Number,
required: [true, 'Please enter product price'],
maxLength: [5, 'Product name cannot exceed 5 characters'],
default: 0.0
},
description: {
type: String,
required: [true, 'Please enter product description'],
},
ratings: {
type: Number,
default: 0
},
images: [
{
public_id: {
type: String,
required: true
},
url: {
type: String,
required: true
},
}
],
category: {
type: String,
required: [true, 'Please select category for this product'],
enum: {
values: [
'Electronics',
'Cameras',
'Laptops',
'Accessories',
'Headphones',
'Food',
"Books",
'Clothes/Shoes',
'Beauty/Health',
'Sports',
'Outdoor',
'Home'
],
message: 'Please select correct category for product'
}
},
seller: {
type: String,
required: [true, 'Please enter product seller']
},
stock: {
type: Number,
required: [true, 'Please enter product stock'],
maxLength: [5, 'Product name cannot exceed 5 characters'],
default: 0
},
numOfReviews: {
type: Number,
default: 0
},
reviews: [
{
user: {
type: mongoose.Schema.ObjectId,
ref: 'User'
},
name: {
type: String,
required: true
},
rating: {
type: Number,
required: true
},
comment: {
type: String,
required: true
}
}
],
user: {
type: mongoose.Schema.ObjectId,
ref: 'User'
},
createdAt: {
type: Date,
default: Date.now
}
})
module.exports = mongoose.model('Product', productSchema);
Here’s the controller.
const Product = require('../models/product')
// Create new product => /api/v1/product/new
exports.newProduct = async(req, res, next) => {
const product = await Product.create(req.body);
res.status(201).json({
success: true,
product
})
}
exports.getProducts = (req, res, next) => {
res.status(200).json({
success: true,
message: 'This route will show all products in database.'
})
}
