Catalog and Detail

Goal

This snapshot advances Emberquay Market by teaching you to render a catalog and product detail page by slug.

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

Prerequisites

Use Elixir 1.15+, Mix, Node.js 20+, and Docker for Postgres stages.

Port 4002 must be free. Copy .env.example before database stages.

• Elixir and Mix
• Node.js and npm
• Docker from part 4 onward

Concepts

List queries eager-load categories; slug keys produce readable product URLs.

LiveView keeps interactive UI on the server; Tailwind styles the storefront; Ecto owns persistence and authorization checks.

Walkthrough

Wire catalog listing and a detail page with price and stock.

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

Repo.paginate(from(p in Product, preload: :category), page: page, page_size: 8)

Run and verify

Enter 05-Catalog-And-Detail, mix deps.get, copy .env.example, migrate, seed, and start Phoenix on port 4002.

Open http://127.0.0.1:4002. From data lessons onward, Ada and Grace use password123.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-phoenix-ecommerce.git
cd fcc-phoenix-ecommerce/05-Catalog-And-Detail
mix deps.get
npm --prefix assets install
cp .env.example .env
mix ecto.setup
mix phx.server

Troubleshooting

Detail 404s when the slug does not match.

For database failures, confirm Docker and the ember_NN name. Never commit .env, _build, deps, or node_modules.

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

Try this

Show formatted currency from price_cents on every card.

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