Search Implementation

MongoDB Text Search

const productSchema = new mongoose.Schema({
  name: String,
  description: String
});

productSchema.index({ name: 'text', description: 'text' });

const Product = mongoose.model('Product', productSchema);

app.get('/search', async (req, res) => {
  const query = req.query.q;
  
  const products = await Product.find(
    { $text: { $search: query } },
    { score: { $meta: 'textScore' } }
  ).sort({ score: { $meta: 'textScore' } });
  
  res.json(products);
});

Regex Search

app.get('/search', async (req, res) => {
  const query = req.query.q;
  
  const products = await Product.find({
    $or: [
      { name: { $regex: query, $options: 'i' } },
      { description: { $regex: query, $options: 'i' } }
    ]
  });
  
  res.json(products);
});

With Filters

app.get('/search', async (req, res) => {
  const { q, category, minPrice, maxPrice } = req.query;
  
  const query = {};
  
  if (q) {
    query.$text = { $search: q };
  }
  
  if (category) {
    query.category = category;
  }
  
  if (minPrice || maxPrice) {
    query.price = {};
    if (minPrice) query.price.$gte = parseInt(minPrice);
    if (maxPrice) query.price.$lte = parseInt(maxPrice);
  }
  
  const products = await Product.find(query);
  
  res.json(products);
});

Autocomplete

app.get('/autocomplete', async (req, res) => {
  const query = req.query.q;
  
  const suggestions = await Product.find({
    name: { $regex: `^${query}`, $options: 'i' }
  })
  .limit(10)
  .select('name');
  
  res.json(suggestions.map(p => p.name));
});

Key Takeaway

Use MongoDB text index for full-text search. Regex for simple searches. Combine search with filters. Add autocomplete for better UX.