nestjs-drizzle-crud-generator

NestJS Drizzle CRUD Generator

Overview

Automatically generates complete CRUD modules for NestJS applications using Drizzle ORM. Creates all necessary files following the zaccheroni-monorepo patterns: feature modules, controllers, services, Zod-validated DTOs, Drizzle schemas, and Jest unit tests.

When to Use

• Creating new entity modules with full CRUD endpoints
• Building database-backed features in NestJS
• Generating type-safe DTOs with Zod validation
• Adding services with Drizzle ORM queries
• Creating unit tests with mocked database

Instructions

Step 1: Define Entity Fields

Gather entity definition:

• Entity name (e.g., user, product, order)
• List of fields with types (see references/field-types.md for supported types)
• Required fields vs optional fields with defaults

Step 2: Run the Generator

python scripts/generate_crud.py --feature <name> --fields '<json-array>' --output <path>

Step 3: Verify Generated Files

Check that all expected files were created:

ls -la libs/server/<feature-name>/src/lib/

Expected structure:

controllers/
services/
dto/
schema/
<feature>-feature.module.ts

Step 4: Run TypeScript Compilation

cd libs/server && npx tsc --noEmit

Step 5: Execute Unit Tests

cd libs/server && npm test -- --testPathPattern=<feature-name>

Examples

Generate a User module

python scripts/generate_crud.py \
  --feature user \
  --fields '[{"name": "name", "type": "string", "required": true}, {"name": "email", "type": "email", "required": true}, {"name": "password", "type": "string", "required": true}]' \
  --output ./libs/server

Generate a Product module

python scripts/generate_crud.py \
  --feature product \
  --fields '[{"name": "title", "type": "string", "required": true}, {"name": "price", "type": "number", "required": true}, {"name": "description", "type": "text", "required": false}, {"name": "inStock", "type": "boolean", "required": false, "default": true}]' \
  --output ./libs/server

Generated Structure