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Prepare Rivermouth Dispatch for Render and managed Postgres.

Goal

This snapshot advances Rivermouth Dispatch by teaching you to prepare Rivermouth Dispatch for Render and managed Postgres.

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

Prerequisites

Use Python 3.11+, a terminal, and Docker for Postgres stages. You should recognize functions, modules, and HTTP verbs.

Port 8001 must be free. Copy .env.example before starting database stages.

  • Python 3 and pip/venv
  • A code editor and terminal
  • Docker from part 4 onward

Concepts

Production needs HTTPS-only cookies, a strong SESSION_SECRET, and environment-only database URLs.

Keep request handling thin: routes accept input, services/models enforce rules, and Jinja templates escape output by default.

Walkthrough

Review render.yaml, set DATABASE_URL and SESSION_SECRET on Render, and never commit .env.

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

SESSION_HTTPS_ONLY=true
APP_URL=https://your-app.onrender.com

Run and verify

Enter 12-Deploy, create a virtualenv, install requirements, copy .env.example when present, and start Uvicorn on port 8001.

Open http://127.0.0.1:8001. Watch the terminal for validation and database errors.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-fastapi-blog.git
cd fcc-fastapi-blog/12-Deploy
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
cp .env.example .env
uvicorn main:app --reload --port 8001

Troubleshooting

If sessions vanish after deploy, check HTTPS-only cookie settings behind a proxy.

Import errors usually mean the virtualenv is inactive or you installed packages in another snapshot. For Postgres failures, confirm Docker and the rivermouth_NN database name.

  • Read the first error first
  • Restart after environment changes
  • Never commit .env or .venv

Try this

List every secret that must live only in the host environment.

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

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