Nean Add Feature

Purpose

Add a complete feature slice to an existing NEAN project with all layers wired up and tests included.

Arguments

• feature-name — Feature name in kebab-case (e.g., user-profile, invoice)
• --no-ui — Skip Angular components (API-only feature)
• --no-api — Skip NestJS module (frontend-only feature)
• --no-entity — Skip TypeORM entity (use existing entity)

What gets created

Default (all layers)

libs/shared/types/src/<feature>.dto.ts           # DTOs + interfaces
libs/api/database/src/entities/<feature>.entity.ts   # TypeORM entity
apps/api/src/modules/<feature>/
  <feature>.module.ts
  <feature>.controller.ts
  <feature>.service.ts
  __tests__/
    <feature>.controller.spec.ts
    <feature>.service.spec.ts
apps/web/src/app/<feature>/
  <feature>.routes.ts
  <feature>-list/
    <feature>-list.component.ts
  <feature>-form/
    <feature>-form.component.ts
  <feature>-detail/
    <feature>-detail.component.ts
libs/web/data-access/src/<feature>/
  <feature>.service.ts
  <feature>.store.ts  (NgRx feature state)

With flags

• --no-ui: Only DTOs + entity + NestJS module
• --no-api: Only DTOs + Angular components + data-access
• --no-entity: Only DTOs + NestJS module + Angular (uses existing entity)

Conventions

Naming

• Feature name: kebab-case (input)
• Classes: PascalCase (e.g., UserProfile, CreateUserProfileDto)
• Files: kebab-case.ts for everything
• API routes: /api/<feature> for collection, /api/<feature>/:id for item

DTO location

All DTOs go in libs/shared/types/src/<feature>.dto.ts:

• Create<Feature>Dto — creation input with validation decorators
• Update<Feature>Dto — partial update input (PartialType)
• <Feature>ResponseDto — API response shape
• Interfaces exported alongside classes

API endpoint structure

• GET /api/<feature> — list (paginated)
• POST /api/<feature> — create
• GET /api/<feature>/:id — get one
• PATCH /api/<feature>/:id — update
• DELETE /api/<feature>/:id — delete

Entity conventions

• Timestamps enabled (@CreateDateColumn, @UpdateDateColumn)
• Indexes defined with comments explaining why
• UUID primary keys by default
• Soft delete pattern if deletion is reversible

Workflow

1. Create DTOs in libs/shared/types
2. Create TypeORM entity (if not --no-entity)
3. Create NestJS module with controller + service (if not --no-api)
4. Create Angular components and routing (if not --no-ui)
5. Create NgRx feature state
6. Create tests for each layer
7. Run npm run lint and npm run test to verify

Output

Summarize: files created, API endpoints available, components ready to use.

Reference

For templates and patterns, see reference/nean-add-feature-reference.md