Registration

Goal

This snapshot advances Emberquay Market by teaching you to validate customer accounts and store password hashes.

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

Registration normalizes email, enforces uniqueness, hashes passwords, signs the user in, and regenerates the session.

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

Walkthrough

Build a registration form with CSRF-safe posts and validation errors.

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

{:ok, user} = Accounts.register_user(attrs)
conn |> put_session(:user_id, user.id) |> configure_session(renew: true)

Run and verify

Enter 06-Registration, 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/06-Registration
mix deps.get
npm --prefix assets install
cp .env.example .env
mix ecto.setup
mix phx.server

Troubleshooting

Duplicate email and password confirmation failures should redisplay field errors.

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

Try a short password, mismatched confirmation, and a duplicate email.

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