Node.js MongoDB Create Database

🚀 Node.js MongoDB – Create Database

We’ll cover both MongoDB native driver and Mongoose.

✅ 1. Install MongoDB Driver or Mongoose

✅ 2. Using Native MongoDB Driver

const { MongoClient } = require("mongodb");

async function main() {
const uri = "mongodb://localhost:27017";
const client = new MongoClient(uri);

try {
await client.connect();
console.log("Connected to MongoDB!");

// Reference a database (will create when data is inserted)
const db = client.db("mydb");

// Create a collection and insert data
const collection = db.collection("users");
const result = await collection.insertOne({
name: "John Doe",
email: "john@example.com"
});

console.log("Database and collection created, document inserted:", result.insertedId);

} catch (err) {
console.error(err);
} finally {
await client.close();
}
}

main();

const { MongoClient } = require("mongodb");

async function main() {

const uri = "mongodb://localhost:27017";

const client = new MongoClient(uri);

try {

await client.connect();

console.log("Connected to MongoDB!");

// Reference a database (will create when data is inserted)

const db = client.db("mydb");

// Create a collection and insert data

const collection = db.collection("users");

const result = await collection.insertOne({

name: "John Doe",

email: "john@example.com"

});

console.log("Database and collection created, document inserted:", result.insertedId);

} catch (err) {

console.error(err);

} finally {

await client.close();

}

main();

Key points:

client.db("mydb") references the database.
Database doesn’t exist until you insert a document.
Collection users is also created automatically when inserting.

✅ 3. Using Mongoose

const mongoose = require("mongoose");

async function main() {
try {
await mongoose.connect("mongodb://localhost:27017/mydb", {
useNewUrlParser: true,
useUnifiedTopology: true
});

console.log("MongoDB database 'mydb' connected via Mongoose!");

// Define schema
const userSchema = new mongoose.Schema({
name: String,
email: String
});

const User = mongoose.model("User", userSchema);

// Insert document (database & collection created automatically)
const user = await User.create({ name: "Alice", email: "alice@example.com" });
console.log("Document inserted:", user);

} catch (err) {
console.error(err);
} finally {
mongoose.connection.close();
}
}

main();

const mongoose = require("mongoose");

async function main() {

try {

await mongoose.connect("mongodb://localhost:27017/mydb", {

useNewUrlParser: true,

useUnifiedTopology: true

});

console.log("MongoDB database 'mydb' connected via Mongoose!");

// Define schema

const userSchema = new mongoose.Schema({

name: String,

email: String

});

const User = mongoose.model("User", userSchema);

// Insert document (database & collection created automatically)

const user = await User.create({ name: "Alice", email: "alice@example.com" });

console.log("Document inserted:", user);

} catch (err) {

console.error(err);

} finally {

mongoose.connection.close();

}

main();

Key points:

mongoose.connect("mongodb://localhost:27017/mydb") references the database.
Database mydb is created automatically when the first document is inserted.
Collections are created automatically by Mongoose models.

✅ 4. Tips & Best Practices

MongoDB databases are lazy-created — they exist only after inserting data.
Always define schemas with Mongoose for consistent documents.
Use meaningful database and collection names.
For production, use connection pooling to improve performance.

Node.js MongoDB Create Database

🚀 Node.js MongoDB – Create Database

✅ 1. Install MongoDB Driver or Mongoose

✅ 2. Using Native MongoDB Driver

✅ 3. Using Mongoose

✅ 4. Tips & Best Practices

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Node.js MongoDB Create Database

🚀 Node.js MongoDB – Create Database

✅ 1. Install MongoDB Driver or Mongoose

✅ 2. Using Native MongoDB Driver

✅ 3. Using Mongoose

✅ 4. Tips & Best Practices

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