netlify-plugin-prisma-provider

netlify-plugin-prisma-provider

Currently, if you're using Prisma to talk to your database, there is no way to set the database provider dynamically. The url connection string can be set via ENV var, but not the provider:

// schema.prisma

datasource DS {
  provider = "sqlite"
  url      = env("DATABASE_URL")
}

If you want to use a SQLite database locally, but use Postgres in production, there is no way to swap out the provider "sqlite" for "postgresql" once you go to production—the string for the provider must be present in this file before Prisma generates the client libraries.

Prisma has an open issue for letting you set this value via ENV var but there is no planned release date.

Until then, this plugin will swap out the provider for you right before your code is built on Netlify. You can set your preferred production database provider as an environment variable and it will be swapped into schema.prisma right before the build begins.

NOTE: The plugin will only replace the provider if its value is sqlite. If postgresql or mysql is present then the replacement is skipped. If switching between Postgres and MySQL in development and production is needed, open an issue and I'll update the plugin to support this scenario!

As of Prisma's beta3 release their migration scripts look at the provider in each migration's snapshot of schema.prisma and compare those against the url in the main schema.prisma. If the protocol doesn't match the provider it will raise an error during the migration. Starting in version 0.3.0 of this plugin, we will also replace the provider in each of the migration snapshots' copy of schema.prisma and steps.json.

Usage

Add a [[plugins]] entry to your netlify.toml file:

[[plugins]]
package = 'netlify-plugin-prisma-provider'
  [plugins.inputs]
  path = 'prisma/schema.prisma'
  varName = 'DATABASE_PROVIDER'

name	description	default
path	The path to the schema.prisma file, relative to the root of your codebase.	prisma/schema.prisma
varName	The name of the ENV variable that contains the provider name.	DATABASE_PROVIDER

Add the environment variable in Netlify with the name you provided varName and a value of postgresql or mysql:

If you don't set the environment variable it will assume you want to use postgresql and will replace that in your schema.prisma. If you don't want that to happen then you'll need to remove this plugin completely!