Pagination and Search

Goal

This snapshot advances Cobblecart Market by teaching you to paginate the catalog and filter by name or category.

Every numbered folder is a complete app. Run this stage independently, then compare it with the previous folder.

Prerequisites

Use Ruby 3.2+, Bundler, Node.js 20+, and Docker for Postgres stages.

Port 3010 must be free. Copy .env.example before database stages.

• Ruby and Bundler
• Node.js and npm
• Docker from part 4 onward

Concepts

Page size 8. Search and category filters apply before paginating and persist in query strings.

Turbo keeps interactive UI on the server; Tailwind styles the storefront; Active Record owns persistence and authorization checks.

Walkthrough

Accept q, category, and page on the catalog.

Read the example, then open the matching snapshot. The repository includes validation, CSRF, and the surrounding structure.

Product.where('name ILIKE ?', "%#{q}%").page(params[:page]).per(8)

Run and verify

Enter 10-Pagination-And-Search, bundle install, copy .env.example, migrate, seed, and boot Puma on port 3010.

Open http://127.0.0.1:3010. From data lessons onward, Ada and Grace use password123.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-rails-ecommerce.git
cd fcc-rails-ecommerce/10-Pagination-And-Search
bundle install
npm install
cp .env.example .env
bin/rails db:prepare
bin/rails server -b 0.0.0.0 -p 3010

Troubleshooting

Off-by-one often comes from mixing 0-based offsets with 1-based pages.

For database failures, confirm Docker and the cobble_NN name. Never commit .env, vendor/bundle, or node_modules.

• Read the first exception first
• Rebuild assets after Tailwind class changes
• Never commit secrets

Try this

Search for a seeded product and confirm the term survives Next links.

Test a happy path and one invalid or unauthorized request.

• Make one small change
• Test it in the browser
• Compare with the next snapshot only after it works