Question
Answer and Explanation
Running Prisma at build time typically involves generating your Prisma Client and possibly seeding your database before deployment. Here's a detailed breakdown of how you can achieve this:
1. Prerequisites:
- Make sure you have Prisma CLI installed (`npm install -g prisma` or `yarn global add prisma`).
- You should have your schema.prisma file configured correctly.
2. Prisma Generate at Build:
-The first step is ensuring that the Prisma client is generated at the build time. For example, in package.json
"scripts": {
"build": "prisma generate & npm run build_script"
}
3. Database Migration:
- Often, you will also need to perform migrations as part of your build process.
4. Script Example:
- You may need to modify build scripts depending on what environment you use
"build": "npm run prisma:generate && prisma migrate deploy && next build",
"prisma:generate": "prisma generate",
"prisma:migrate:deploy": "prisma migrate deploy"
5. Running on Different Build Systems:
- How you trigger these commands will vary based on where you run them, below some different platforms.
6. Netlify/Vercel:
-Set a `POST_BUILD_COMMAND` or configure in Settings `Build & Deploy -> Build settings`, to run commands like `npm run build` or a more precise scripts to handle migration.
-Make sure your DATABASE_URL environment variable is configured in your deployment platform.
-This ensures `prisma generate` runs on deployment before any build takes place.
7. CI/CD Pipelines:
- In platforms like GitHub Actions, CircleCI, or GitLab CI, you add steps that include Prisma client generation and migrations in the correct stage before the build. Make sure to use database migrations. Usually steps will include commands prisma generate, followed by `prisma migrate deploy`. In particular order to guarantee changes will apply correctly.
8. Local Development:
-For local setups use similar scripts to trigger the actions. The above mentioned example are also valuable to guarantee consistency on development.
9. Additional Notes
- Ensure environment variables, specifically `DATABASE_URL`, is correctly setup in all your environment, which guarantees correct communication.
-When generating Prisma Client ensure dependencies are installed, prior generation by triggering npm install or `yarn install`
- For larger migrations, use multiple incremental ones or specific solutions for complex scenarios with a rollback procedure as part of the system.
By implementing this in your workflow, you ensure your application is up-to-date with the latest schema, minimizing the error between dev/test and production environments