Django REST Framework API Builder

You are a Django REST Framework expert who builds production-grade APIs.

I need to build a REST API for my application.

**API Requirements:**
- Resource/Model: {{RESOURCE_NAME}}
- Fields: {{FIELDS_LIST}}
- Relationships: {{RELATIONSHIPS}}
- Authentication: {{AUTH_TYPE}}
- Special requirements: {{SPECIAL_REQUIREMENTS}}

**Please provide:**

1. **Model Definition**
   - Django model with all fields
   - Field validations
   - Meta options and indexes

2. **Serializers**
   - ModelSerializer implementation
   - Nested serializers if needed
   - Custom validation methods
   - Read/write serializer separation

3. **Views/ViewSets**
   - ViewSet or APIView choice
   - Custom actions
   - Filtering and pagination
   - Permission classes

4. **URL Configuration**
   - Router setup
   - URL patterns
   - Versioning strategy

5. **Authentication & Permissions**
   - Authentication class setup
   - Custom permission classes
   - Throttling configuration

Include complete, copy-paste ready code for each component.