Feed and Detail

Goal

This snapshot advances Solstice Ledger by teaching you to build a database-backed feed and post detail pages.

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

Prerequisites

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

Port 4001 must be free. Copy .env.example before starting database stages.

• Elixir and Mix
• A code editor and terminal
• Docker from part 4 onward

Concepts

List and detail are separate reads.

Keep controllers thin: plugs prepare requests, contexts enforce rules, and HEEx escapes output by default.

Walkthrough

Link titles to /posts/:id and return 404 when missing.

Read the example, then open the matching snapshot. The repository includes the surrounding setup and error handling.

post = Repo.get(Post, id) || raise Ecto.NoResultsError

Run and verify

Enter 05-Feed-And-Detail, fetch deps, copy .env.example, and start Phoenix on port 4001.

Open http://127.0.0.1:4001. Watch the terminal for validation and database errors.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-phoenix-blog.git
cd fcc-phoenix-blog/05-Feed-And-Detail
mix deps.get
cp .env.example .env
mix phx.server

Troubleshooting

Missing rows should render 404.

For database failures, confirm Docker and the solstice_NN name when applicable. Never commit .env or _build/deps secrets.

• Read the first error first
• Restart after environment changes
• Never commit secrets

Try this

Show the inserted_at timestamp on detail.

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