17.md

17. Problem: Mongoose Schema and Model

Problem Statement: Define a Mongoose schema for a "User" with properties: "username" (string) and "email" (string). Create a Mongoose model for the User schema. Implement a function to add a new user to the MongoDB database.

Function Signature:

/**
 * Adds a new user to the MongoDB database
 * @param {Object} user - User object with properties username and email
 */
function addUserToDatabase(user) {
  // Your implementation here
}

Expected Output:

• If the user is successfully added, log a success message.

Test Cases:

1. Call addUserToDatabase({ username: 'john_doe', email: 'john@example.com' }) and check the server logs for a success message.

Hint:

To solve this problem, you need to follow these steps:

Define a Mongoose schema for the "User" with properties "username" (string) and "email" (string). Create a Mongoose model for the User schema. Implement a function addUserToDatabase that takes a user object and adds it to the MongoDB database using the User model. Here are some hints to guide you through the process:

Define the Mongoose schema:

Use mongoose.Schema to define a schema for the User. The schema should have two fields: "username" (String) and "email" (String). Create the Mongoose model:

Use mongoose.model to create a model for the User schema. Pass the model a name (e.g., 'User') and the schema you defined. Implement the addUserToDatabase function:

Inside the function, create a new User object using the provided user data. Use the save method on the User object to save it to the database. Log a success message if the user is saved successfully, or an error message if there's an error. Remember to connect Mongoose to your MongoDB database using mongoose.connect.