Prismarls

Prismarls is a CLI tool designed to facilitate the integration of PostgreSQL Row-Level Security (RLS) with Prisma Migrations. After creating a migration using prisma migrate dev --create-only, running prismarls will automatically generate SQL to append RLS configurations to the latest migration file.

Here's an example of the SQL generated by Prisma Migrate:

-- CreateTable
CREATE TABLE "Company" (
    "id" TEXT NOT NULL,
    "name" TEXT NOT NULL,
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "Company_pkey" PRIMARY KEY ("id")
);

Prismarls will add the following RLS settings:

-- RLS Settings
ALTER TABLE "Company" ENABLE ROW LEVEL SECURITY;
ALTER TABLE "Company" FORCE ROW LEVEL SECURITY;
CREATE POLICY tenant_isolation_policy ON "Company" USING("id" = current_setting('app.company_id'));
CREATE POLICY bypass_rls_policy ON "Company" USING (current_setting('app.bypass_rls', TRUE)::text = 'on');

Usage

Create a migration with Prisma Migrate and then append RLS configurations using Prismarls:

# Create a migration with Prisma Migrate --create-only
npx prisma migrate dev --create-only --name migration
# Use Prismarls to add RLS settings and create policies for the specified tables
npx @shoito/prismarls --schema=./prisma/schema.prisma --migrations=./prisma/migrations --currentSettingIsolation=app.company_id --currentSettingBypass=app.bypass_rls

schema.prisma

Add a /// @RLS comment in your schema.prisma to specify tables and columns for which RLS should be configured.

model Company {
  id        String   @id @default(cuid()) /// @RLS
  name      String
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

If table or column names are specified using map, include these in the @RLS annotation:

model User {
  id        String   @id @default(cuid())
  email     String   @unique
  company   Company? @relation(fields: [companyId], references: [id])
  companyId String?  @map("company_id") /// @RLS(table: "users", column: "company_id")
  @@map("users")
}

Command Options

• --schema: Path to your Prisma schema.prisma file. Default is ./prisma/schema.prisma.
• --migrations: Directory path containing migration files generated by Prisma Migrate. Default is ./prisma/migrations.
• --currentSettingIsolation: Specify the current setting for RLS isolation. Default is app.tenant_id.
• --currentUser: Specify if using current_user with RLS. Default is false.
• --currentSettingBypass: Specify the current setting for RLS bypass. Default is app.bypass_rls.

Prisma Limitations

• Settings from prisma db pull do not include RLS configurations.
• Deploying schemas with prisma db push does not apply RLS settings.

License

MIT