Profiles and Media

Goal

This snapshot advances Solstice Ledger by teaching you to show author profiles and accept constrained avatar uploads.

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

Upload endpoints must check type and size and store safe filenames.

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

Walkthrough

Protect profile editing and serve uploads.

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

if content_type not in ~w(image/jpeg image/png image/webp), do: {:error, :bad_type}

Run and verify

Enter 08-Profiles-And-Media, 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/08-Profiles-And-Media
mix deps.get
cp .env.example .env
mix phx.server

Troubleshooting

Confirm multipart enctype and field name.

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

Upload a valid image, then reject a text file.

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