### Install NeutronAPI

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Installs the NeutronAPI package using pip. This is the initial step to begin using the framework.

```bash
pip install neutronapi
```

--------------------------------

### NeutronAPI Project and App Creation

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Commands to create a new NeutronAPI project and an application within that project. It also shows how to start the development server and run tests.

```bash
neutronapi startproject blog
cd blog
python manage.py startapp posts
python manage.py start
python manage.py test
```

--------------------------------

### Start NeutronAPI Development Server

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Command to start the NeutronAPI development server. It also provides the URL to access the running application.

```bash
python manage.py start
# Visit: http://127.0.0.1:8000/posts
```

--------------------------------

### NeutronAPI Application Setup with Middleware and Registry

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Python code for setting up a NeutronAPI application, including registering APIs, middlewares (like CompressionMiddleware and AllowedHostsMiddleware), and defining services in the registry for dependency injection.

```python
from neutronapi.application import Application
from neutronapi.middleware.compression import CompressionMiddleware
from neutronapi.middleware.allowed_hosts import AllowedHostsMiddleware
from apps.posts.api import PostAPI

# Example dependencies
class Logger:
    def info(self, message: str) -> None:
        print(f"[INFO] {message}")

class CacheService:
    def __init__(self):
        self._cache = {}
    
    def get(self, key: str) -> any:
        return self._cache.get(key)
    
    def set(self, key: str, value: any) -> None:
        self._cache[key] = value

# Modern registry-based dependency injection
app = Application(
    apis=[PostAPI()],
    middlewares=[
        AllowedHostsMiddleware(allowed_hosts=["localhost", "127.0.0.1"]),
        CompressionMiddleware(minimum_size=512),
    ],
    registry={
        'utils:logger': Logger(),
        'services:cache': CacheService(),
        'services:email': EmailService(),
    }
)
```

--------------------------------

### Bash Server Commands

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Provides examples of running the NeutronAPI development and production servers, including options for custom host, port, and worker configuration.

```bash
# Development (auto-reload, localhost)
python manage.py start

# Production (multi-worker, optimized)  
python manage.py start --production

# Custom configuration
python manage.py start --host 0.0.0.0 --port 8080 --workers 4
```

--------------------------------

### Bash NeutronAPI Management Commands

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Lists common management commands for NeutronAPI projects, such as starting the server, running tests, managing migrations, and creating new apps.

```bash
python manage.py start              # Start server
python manage.py test               # Run tests  
python manage.py migrate            # Run migrations
python manage.py startapp posts     # Create new app
```

--------------------------------

### Define API Endpoints in NeutronAPI

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Python code demonstrating how to define API resources and endpoints using NeutronAPI's `API` and `endpoint` decorators. It shows how to access registry dependencies and handle request methods like GET and POST.

```python
from neutronapi.base import API, endpoint

class PostAPI(API):
    resource = "/posts"
    name = "posts"
    
    @endpoint("/", methods=["GET"])
    async def list_posts(self, scope, receive, send, **kwargs):
        # Access registry dependencies
        logger = self.registry.get('utils:logger')
        cache = self.registry.get('services:cache')
        
        posts = [{"id": 1, "title": "Hello World"}]
        return await self.response(posts)
    
    @endpoint("/", methods=["POST"])
    async def create_post(self, scope, receive, send, **kwargs):
        # JSON parser is the default; access body via kwargs
        data = kwargs["body"]  # dict
        return await self.response({"id": 2, "title": data.get("title", "New Post")})
```

--------------------------------

### Organize Exceptions by Module in NeutronAPI

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Provides examples of how exceptions are categorized and imported from different modules within the NeutronAPI framework. This includes framework-level exceptions, database-specific exceptions, authentication exceptions, middleware exceptions, and OpenAPI exceptions, promoting modularity in error management.

```python
# Module-specific exceptions
from neutronapi.api.exceptions import APIException, ValidationError, NotFound
from neutronapi.db.exceptions import DoesNotExist, MigrationError, IntegrityError
from neutronapi.authentication.exceptions import AuthenticationFailed
from neutronapi.middleware.exceptions import RouteNotFound, MethodNotAllowed
from neutronapi.openapi.exceptions import InvalidSchemaError

# Generic framework exceptions
from neutronapi.exceptions import ImproperlyConfigured, ValidationError, ObjectDoesNotExist
```

--------------------------------

### Configure ASGI Entry Point and Database

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Python code snippet for configuring the ASGI application entry point and database settings in NeutronAPI's settings file. It specifies the module and variable for the ASGI app and the database engine and name.

```python
import os

# ASGI application entry point (required for server)
ENTRY = "apps.entry:app"  # module:variable format

# Database
DATABASES = {
    'default': {
        'ENGINE': 'aiosqlite',
        'NAME': 'db.sqlite3',
    }
}
```

--------------------------------

### Bash Running Custom Management Command

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Shows how to execute a custom management command ('greet') in NeutronAPI, passing arguments to customize its behavior.

```bash
python manage.py greet Alice    # Hello, Alice!
```

--------------------------------

### Python Application with Middlewares

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Illustrates configuring NeutronAPI applications with various middleware, such as compression and allowed hosts, and applying middleware at the endpoint level.

```python
from neutronapi.middleware.compression import CompressionMiddleware
from neutronapi.middleware.allowed_hosts import AllowedHostsMiddleware

app = Application(
    apis=[PostAPI()],
    middlewares=[
        AllowedHostsMiddleware(allowed_hosts=["localhost", "yourdomain.com"]),
        CompressionMiddleware(minimum_size=512),  # Compress responses > 512 bytes
    ]
)

# Endpoint-level middleware
@endpoint("/upload", methods=["POST"], middlewares=[AuthMiddleware()])
async def upload_file(self, scope, receive, send, **kwargs):
    # This endpoint has auth middleware
    pass
```

--------------------------------

### Bash Testing and Development Tooling

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates how to run tests and utilize development tooling like Black and Flake8 for code formatting and linting within a NeutronAPI project.

```bash
# SQLite (default)
python manage.py test

# Specific tests
python manage.py test app.tests.test_models.TestUser.test_creation

# Dev tooling (only neutronapi/ is targeted)
black neutronapi
flake8 neutronapi
```

--------------------------------

### Python API with Type Hints

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates NeutronAPI's full type hint support for IDE integration, including typed registry access for services like caching and logging.

```python
from typing import Dict, List, Optional
from neutronapi.base import API, Response, endpoint
from neutronapi.application import Application

class TypedAPI(API):
    resource = "/api"
    
    @endpoint("/users", methods=["GET"])
    async def get_users(self, scope: Dict[str, Any], receive, send) -> Response:
        # Full type support with autocomplete
        cache: CacheService = self.registry.get('services:cache')
        users: List[Dict[str, str]] = cache.get('users') or []
        
        return await self.response(users)

# Type-safe registry access
def get_typed_dependency[T](app: Application, key: str) -> Optional[T]:
    return app.get_registry_item(key)

logger = get_typed_dependency[Logger](app, 'utils:logger')
```

--------------------------------

### Data Handling and File Uploads

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates how to handle JSON data and file uploads using different parsers.

```APIDOC
## POST /api/data

### Description
Handles incoming JSON data.

### Method
POST

### Endpoint
/api/data

### Request Body
- **body** (dict) - Required - Parsed JSON dictionary.

### Response
#### Success Response (200)
- **received** (dict) - The received JSON data.

#### Response Example
```json
{
  "received": {
    "key": "value"
  }
}
```

## POST /upload

### Description
Handles file uploads and form data.

### Method
POST

### Endpoint
/upload

### Parameters
#### Request Body
- **files** (dict) - Uploaded files.
- **form** (dict) - Form fields.

### Response
#### Success Response (200)
- **status** (str) - Indicates the upload status.

#### Response Example
```json
{
  "status": "uploaded"
}
```
```

--------------------------------

### Advanced Registry Usage for Dependency Injection

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Illustrates advanced usage of NeutronAPI's registry for dependency injection with type safety. It defines protocols for services, provides implementations, and shows how to register and retrieve these services within an API endpoint. This promotes cleaner code and easier testing.

```python
from neutronapi.application import Application
from neutronapi.api import API, endpoint
from typing import Protocol

# Define interfaces for better type safety
class EmailServiceProtocol(Protocol):
    async def send(self, to: str, subject: str, body: str) -> None: ...

class MetricsProtocol(Protocol):
    def increment(self, metric: str) -> None: ...

# Implementation
class SMTPEmailService:
    async def send(self, to: str, subject: str, body: str) -> None:
        # SMTP implementation
        pass

class PrometheusMetrics:
    def increment(self, metric: str) -> None:
        # Prometheus implementation
        pass

# Assuming StructuredLogger and JWTAuthModule are defined elsewhere
class StructuredLogger:
    pass
class JWTAuthModule:
    pass

# Register with clear namespacing
app = Application(
    registry={
        'services:email': SMTPEmailService(),
        'services:metrics': PrometheusMetrics(),
        'utils:logger': StructuredLogger(),
        'modules:auth': JWTAuthModule(),
    }
)

# Usage with type safety
class OrderAPI(API):
    @endpoint("/orders", methods=["POST"])
    async def create_order(self, scope, receive, send, **kwargs):
        email: EmailServiceProtocol = self.registry.get('services:email')
        metrics: MetricsProtocol = self.registry.get('services:metrics')
        
        # Your business logic here
        metrics.increment('orders.created')
        await email.send('user@example.com', 'Order Confirmed', 'Thanks!')
        
        return await self.response({"status": "created"})
```

--------------------------------

### NeutronAPI Universal Registry System Usage

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Python code illustrating the NeutronAPI's universal registry system for dependency injection. It shows how to register dependencies, access them in APIs with type safety, and use registry utility methods.

```python
from neutronapi.application import Application

# Register dependencies with namespace:name pattern
app = Application(
    registry={
        'utils:logger': Logger(),
        'utils:cache': RedisCache(),
        'services:email': EmailService(), 
        'services:database': DatabaseService(),
        'modules:auth': AuthModule(),
    }
)

# Access in APIs
class UserAPI(API):
    @API.endpoint("/register", methods=["POST"])
    async def register(self, scope, receive, send, **kwargs):
        # Type-safe access with IDE support
        logger = self.registry.get('utils:logger')
        email = self.registry.get('services:email')
        
        logger.info("User registration started")
        await email.send_welcome_email(user_data)
        
        return await self.response({"status": "registered"})

# Dynamic registration
app.register('utils:metrics', MetricsCollector())
app.register('services:payment', PaymentProcessor())

# Registry utilities
print(app.list_registry_keys())  # All keys
print(app.list_registry_keys('utils'))  # Just utils namespace
print(app.has_registry_item('services:email'))  # True
```

--------------------------------

### Python Background Task and API

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Illustrates how to define background tasks with specific frequencies and create simple API endpoints within the NeutronAPI application.

```python
from neutronapi.background import Task, TaskFrequency
from neutronapi.base import API, endpoint
from neutronapi.application import Application

class CleanupTask(Task):
    name = "cleanup"
    frequency = TaskFrequency.MINUTELY
    
    async def run(self, **kwargs):
        print("Cleaning up logs...")

class PingAPI(API):
    resource = "/ping"
    
    @endpoint("/", methods=["GET"])
    async def ping(self, scope, receive, send, **kwargs):
        return await self.response({"status": "ok"})

# Add to application  
app = Application(
    apis=[PingAPI()],
    tasks={"cleanup": CleanupTask()}
)
```

--------------------------------

### OpenAPI Documentation Generation

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Shows how to automatically generate OpenAPI 3.0 specifications for your APIs.

```APIDOC
## GET /v1/users/

### Description
Lists all users. This is an example of an automatically discovered API endpoint.

### Method
GET

### Endpoint
/v1/users/

### Parameters
*(No parameters specified for this endpoint in the provided text.)*

### Response
#### Success Response (200)
- **users** (list) - A list of user objects.

#### Response Example
```json
{
  "users": []
}
```

## GET /debug/status

### Description
Provides status information for debugging. This endpoint is hidden by default but can be included in documentation generation.

### Method
GET

### Endpoint
/debug/status

### Parameters
*(No parameters specified for this endpoint in the provided text.)*

### Response
#### Success Response (200)
- **debug** (bool) - A boolean indicating the debug status.

#### Response Example
```json
{
  "debug": true
}
```
```

--------------------------------

### Error Handling

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Details the exception hierarchy and how to raise custom exceptions.

```APIDOC
## GET /users/<int:user_id>

### Description
Retrieves a user by their ID, with validation and not found error handling.

### Method
GET

### Endpoint
/users/<int:user_id>

### Parameters
#### Path Parameters
- **user_id** (int) - Required - The ID of the user to retrieve.

### Response
#### Success Response (200)
- *(User object details not specified in the provided text.)*

#### Response Example
```json
{
  "user_id": 123,
  "name": "John Doe"
}
```

#### Error Responses
- **400 Bad Request** (ValidationError): If User ID is missing.
- **404 Not Found** (NotFound): If the user is not found.
- **422 Unprocessable Entity** (BusinessLogicError): For custom business logic errors.
```

--------------------------------

### Python ORM Database Queries

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Illustrates basic database operations using NeutronAPI's ORM, including fetching all records, filtering by criteria, and creating new records.

```python
from neutronapi.db.models import Model
from neutronapi.db.fields import CharField, IntegerField, DateTimeField

class Post(Model):
    title = CharField(max_length=200)
    content = TextField()
    created_at = DateTimeField(auto_now_add=True)

# Basic queries
await Post.objects.all()
await Post.objects.filter(title="My Post")
await Post.objects.create(title="New Post", content="...")
```

--------------------------------

### Advanced Registry Usage

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Illustrates the use of a registry for managing dependencies and services within the API.

```APIDOC
## POST /orders

### Description
Creates a new order, utilizing registered services for email and metrics.

### Method
POST

### Endpoint
/orders

### Parameters
#### Request Body
*(Details not specified in the provided text for this specific endpoint's request body.)*

### Response
#### Success Response (200)
- **status** (str) - The status of the order creation.

#### Response Example
```json
{
  "status": "created"
}
```
```

--------------------------------

### Generate OpenAPI 3.0 Specifications with NeutronAPI

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates how to use `OpenAPIGenerator` from NeutronAPI to automatically create OpenAPI 3.0 specifications for your APIs. It shows how to define APIs, mark them as hidden, and generate documentation for public-facing APIs or complete documentation including hidden ones.

```python
from neutronapi.openapi.openapi import OpenAPIGenerator
from neutronapi.api import API, endpoint

# Basic API - automatically discovered
class UserAPI(API):
    resource = "/v1/users"
    name = "users"
    
    @API.endpoint("/", methods=["GET"], name="list")
    async def list_users(self, scope, receive, send, **kwargs):
        return await self.response({"users": []})

# Internal/debug API - hidden by default
class DebugAPI(API):
    resource = "/debug"
    name = "debug" 
    hidden = True  # Excluded from docs by default
    
    @API.endpoint("/status", methods=["GET"], name="status")
    async def debug_status(self, scope, receive, send, **kwargs):
        return await self.response({"debug": True})

# Generate public API docs (excludes hidden APIs)
async def generate_public_docs():
    apis = {"users": UserAPI(), "debug": DebugAPI()}
    
    generator = OpenAPIGenerator(title="My API", version="1.0.0")
    spec = await generator.generate(source=apis)
    # Result: Only includes /v1/users endpoints
    
# Generate complete docs (includes everything)
async def generate_complete_docs():
    apis = {"users": UserAPI(), "debug": DebugAPI()}
    
    generator = OpenAPIGenerator(
        title="Complete API",
        include_all=True  # Include hidden APIs and private endpoints
    )
    spec = await generator.generate(source=apis)
    # Result: Includes both /v1/users and /debug endpoints
```

--------------------------------

### Python Custom Management Command

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates how to create a custom management command in NeutronAPI by extending the BaseCommand class, similar to Django's structure.

```python
# apps/blog/commands/greet.py
from neutronapi.commands.base import BaseCommand

class Command(BaseCommand):
    help = "Greet a user"
    
    def handle(self, *args, **options):
        name = args[0] if args else "World"
        self.success(f"Hello, {name}!")
        return 0
```

--------------------------------

### Define API Endpoints with JSON and File Upload Parsers

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Demonstrates how to define API endpoints using NeutronAPI decorators. It shows a basic JSON POST endpoint and a file upload endpoint supporting multipart and form data parsing. Parses are configured using `MultiPartParser` and `FormParser`.

```python
from neutronapi.api import endpoint
from neutronapi.parsers import MultiPartParser, FormParser

# Default: JSON parser
@endpoint("/api/data", methods=["POST"])
async def json_data(self, scope, receive, send, **kwargs):
    data = kwargs["body"]  # Parsed JSON dict
    return await self.response({"received": data})

# Custom parsers
@endpoint("/upload", methods=["POST"], parsers=[MultiPartParser(), FormParser()])
async def upload_file(self, scope, receive, send, **kwargs):
    files = kwargs["files"]  # Uploaded files
    form_data = kwargs["form"]  # Form fields
    return await self.response({"status": "uploaded"})
```

--------------------------------

### Python Database Model Definition

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Shows the definition of a database model 'User' using NeutronAPI's ORM, specifying fields like name, age, and creation timestamp.

```python
from neutronapi.db.models import Model
from neutronapi.db.fields import CharField, IntegerField, DateTimeField

class User(Model):
    name = CharField(max_length=100)
    age = IntegerField()
    created_at = DateTimeField(auto_now_add=True)
```

--------------------------------

### Python Parser Imports

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Imports various parser classes provided by the NeutronAPI library, including FormParser, MultiPartParser, and BinaryParser.

```python
from neutronapi.parsers import FormParser, MultiPartParser, BinaryParser
```

--------------------------------

### Implement Custom Error Handling with NeutronAPI Exceptions

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Shows how to implement robust error handling within NeutronAPI endpoints. It demonstrates raising built-in exceptions like `ValidationError` and `NotFound`, and how to define custom exceptions inheriting from `APIException` for specific business logic errors. The code includes a basic database lookup simulation.

```python
from neutronapi.api import endpoint
from neutronapi.api.exceptions import ValidationError, NotFound, APIException

# Assume get_user_from_db is an async function that fetches user data
async def get_user_from_db(user_id: int):
    # Mock database lookup
    if user_id == 1:
        return {"id": 1, "name": "John Doe"}
    return None

@endpoint("/users/<int:user_id>", methods=["GET"])
async def get_user(self, scope, receive, send, **kwargs):
    user_id = kwargs["user_id"]
    
    if not user_id:
        raise ValidationError("User ID is required")
    
    user = await get_user_from_db(user_id)
    if not user:
        raise NotFound("User not found")
    
    return await self.response(user)

# Custom exceptions
class BusinessLogicError(APIException):
    status_code = 422
    
    def __init__(self, message: str = "Business logic error"):
        super().__init__(message, type="business_error")
```

--------------------------------

### Generate OpenAPI Spec for All Endpoints

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Generates a complete OpenAPI specification that includes all defined API endpoints. This is a convenience function for comprehensive documentation.

```python
from neutronapi.openapi.openapi import generate_all_endpoints_openapi
spec = await generate_all_endpoints_openapi(apis, title="All Endpoints")
```

--------------------------------

### Python ORM Full-Text Search

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Showcases NeutronAPI's full-text search capabilities, including searching across text fields, field-specific searches, and ranking results.

```python
# Search across text fields
await Post.objects.search("python framework")

# Field-specific search
await Post.objects.filter(content__search="database")

# Ranked results (PostgreSQL/SQLite FTS5)
await Post.objects.search("api").order_by_rank()
```

--------------------------------

### Generate OpenAPI Spec Excluding Patterns

Source: https://github.com/aaronkazah/neutronapi/blob/main/README.md

Generates an OpenAPI specification while excluding specific API paths like '/debug/*' and '/internal/*'. This is useful for keeping internal or non-public APIs out of the generated documentation.

```python
async def generate_filtered_docs():
    apis = {"users": UserAPI(), "debug": DebugAPI()}
    
    generator = OpenAPIGenerator(
        title="Filtered API",
        exclude_patterns=["/debug/*", "/internal/*"]
    )
    spec = await generator.generate(source=apis)
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.