Your First Resource (CRUD)

Let's put the principles into practice. We'll design a Productsresource following the industry-standard CRUD (Create, Read, Update, Delete) pattern.

The Standard Endpoint Map

Implementation Pattern

A professional route handler should perform 4 steps: Parse, Validate, Execute, and Respond.

// POST /products Example (Express-like pseudo-code)
app.post('/products', (req, res) => {
  const { name, price } = req.body; // Parse
  
  if (!name || price < 0) { // Validate
    return res.status(400).json({ error: 'Invalid data' });
  }

  const product = await Product.create({ name, price }); // Execute
  
  res.status(201).json({ status: 'success', data: { product } }); // Respond
});