Prisma

Source Cursor rule: .cursor/rules/prisma.mdc. Original file scope: **/*.prisma. Original Cursor alwaysApply: false.

Prisma Schema

Migration Workflow

Schema changes happen in packages/db, then regenerate types in each app.

Step 1: Edit Schema

# Schema files are in packages/db/prisma/schema/
packages/db/prisma/schema/
├── schema.prisma      # Main schema with datasource
├── user.prisma        # User models
├── task.prisma        # Task models
└── ...

Step 2: Create Migration

# Run from packages/db
cd packages/db
bunx prisma migrate dev --name your_migration_name

Step 3: Regenerate Types in Apps

# Each app needs to regenerate Prisma client types
bun run -F apps/app db:generate
bun run -F apps/api db:generate
bun run -F apps/portal db:generate

# Or from root (if configured)
bun run prisma:generate

✅ Always Do This

# 1. Make schema changes in packages/db
# 2. Create migration
cd packages/db && bunx prisma migrate dev --name add_user_role

# 3. Regenerate types in ALL apps that use the db
bun run -F apps/app db:generate
bun run -F apps/api db:generate
bun run -F apps/portal db:generate

❌ Never Do This

# Don't edit schema in app directories
apps/app/prisma/schema.prisma  # ❌ Wrong location

# Don't forget to regenerate types
bunx prisma migrate dev  # ✅ Created migration
# ... forgot to run db:generate in apps  # ❌ Types out of sync

Core Rule

Always use prefixed CUIDs for IDs using generate_prefixed_cuid.

ID Pattern

✅ Always Do This

model User {
  id String @id @default(dbgenerated("generate_prefixed_cuid('usr'::text)"))
  // ... other fields
}

model Task {
  id String @id @default(dbgenerated("generate_prefixed_cuid('tsk'::text)"))
  // ... other fields
}

model Organization {
  id String @id @default(dbgenerated("generate_prefixed_cuid('org'::text)"))
  // ... other fields
}

❌ Never Do This

// Don't use UUID
model User {
  id String @id @default(uuid())
}

// Don't use auto-increment
model User {
  id Int @id @default(autoincrement())
}

// Don't forget ::text cast
model User {
  id String @id @default(dbgenerated("generate_prefixed_cuid('usr')")) // ❌ Missing ::text
}

Prefix Guidelines

Rules

1. Short prefixes - Use 2-3 characters
2. Unique prefixes - Each model gets its own prefix
3. Always cast - Include ::text in the function call
4. Use dbgenerated - Wrap the function call in dbgenerated()

Benefits

• Human-readable IDs at a glance (usr_ vs org_)
• Easy debugging in logs
• Safe to expose in URLs
• Unique across all tables

Checklist

After schema changes:

• Schema edited in packages/db/prisma/schema/
• Migration created with bunx prisma migrate dev
• Types regenerated in apps/app with db:generate
• Types regenerated in apps/api with db:generate
• Types regenerated in apps/portal with db:generate
• New models use prefixed CUID IDs