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blog-api-express

Task:

Build a RESTful API with Express, Mongoose, dotenv, and validator to manage a collection of products in a MongoDB database.

Objectives

  1. Use Mongoose to define a Product schema with validation using the validator library.
  2. Implement backend routes with Express to perform CRUD operations.
  3. Use Mongoose queries like select(), limit(), sort(), find(), and findById().

Requirements

1. Define a Product Schema

The schema should include the following fields:
  • name: String, required, minimum length of 3, trimmed.
  • price: Number, required, must be a positive number.
  • category: String, required, must match one of the categories (electronics, fashion, food). Use validator for custom validation.
  • createdAt: Date, defaults to the current timestamp.
  • inStock: Boolean, defaults to true.
  • description: String, optional, with a maximum length of 150 characters.

2. Mongoose Pre-Save Hooks

  • Capitalize the first letter of the name before saving to the database.

3. Backend Routes with Express

Create the following routes:
  • POST /api/products
    • Add a new product to the database. Ensure the validation works as expected.
  • GET /api/products
    • Fetch all products with the following Mongoose query methods:
      • select(): Return only the name, price, and category fields.
      • limit(): Limit the results to the first 10 products.
      • sort(): Sort products by price in ascending order.
  • GET /api/products/:id
    • Use findById() to fetch a single product by its id.
  • PUT /api/products/:id
    • Update an existing product’s details using its id.
  • DELETE /api/products/:id
    • Remove a product from the database using its id.

Additional Information

  1. Environment Variables

    • Use the dotenv package to store the database URL and server port in a .env file.

  2. Testing

    • Test your routes using Postman or similar tools. Verify all CRUD operations and validation logic work correctly.

Additional Notes

  • Use clean and modular code.
  • Organize your project into models, controllers, and routes folders.
  • Provide meaningful error messages for failed validations and invalid requests.

Hints

  • Use validator to ensure the category matches the allowed values (electronics, fashion, food).
  • Use sort() to display products in ascending order based on price.
  • Use select() to display specific fields such as name, price, and category.

#####Please feel free to contact me for further information!