chapter7 code

Chapter07/sitters-catalog/.env.example

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+MONGO_URI=mongodb://localhost:27017
+DB_NAME=babysitter_catalog
+APP_TITLE=Babysitter Catalog API
+DEBUG=false

Chapter07/sitters-catalog/.python-version

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+3.13

Chapter07/sitters-catalog/README.md

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+# Babysitter Catalog API
+
+A DDD-inspired CRUD microservice for managing babysitter profiles, built with
+**FastAPI**, **Beanie** (async ODM), and **MongoDB**.
+
+---
+
+## Project structure
+
+```
+sitters-catalog/
+├── main.py                          # Root re-export (fastapi dev entry)
+├── pyproject.toml
+├── .env.example
+│
+└── babysitter_catalog/
+    ├── main.py                      # App factory + lifespan
+    ├── config.py                    # pydantic-settings
+    │
+    ├── domain/
+    │   ├── babysitter.py            # BabysitterDocument (Beanie model)
+    │   └── value_objects.py         # Location, ContactInfo, AvailabilitySlot
+    │
+    ├── application/
+    │   ├── dtos.py                  # Create / Update / Response / Search DTOs
+    │   └── babysitter_service.py    # Use-case methods
+    │
+    ├── infrastructure/
+    │   └── mongo_repository.py      # Beanie query wrappers
+    │
+    └── presentation/
+        └── babysitter_router.py     # FastAPI APIRouter — all CRUD endpoints
+```
+
+---
+
+## Setup
+
+### 1. Prerequisites
+
+- Python 3.13+
+- [uv](https://github.com/astral-sh/uv) (recommended) or pip
+- A running MongoDB instance (local or Atlas)
+
+### 2. Clone & install
+
+```bash
+git clone <repo-url>
+cd sitters-catalog
+
+# with uv
+uv sync
+
+# or with pip
+pip install -e .
+```
+
+### 3. Configure environment
+
+```bash
+cp .env.example .env
+# edit .env and set MONGO_URI to your connection string
+```
+
+---
+
+## Running
+
+### Development (auto-reload)
+
+```bash
+fastapi dev
+# or explicitly:
+fastapi dev babysitter_catalog/main.py
+```
+
+### Production
+
+```bash
+fastapi run
+# or with uvicorn directly:
+uvicorn babysitter_catalog.main:app --host 0.0.0.0 --port 8000 --workers 4
+```
+
+Interactive docs are available at `http://localhost:8000/docs`.
+
+---
+
+## API endpoints
+
+| Method | Path                              | Description                        |
+|--------|-----------------------------------|------------------------------------|
+| GET    | /health                           | Health check                       |
+| POST   | /api/v1/babysitters/              | Create a babysitter                |
+| GET    | /api/v1/babysitters/              | List / search babysitters          |
+| GET    | /api/v1/babysitters/featured      | Top 5 by experience                |
+| GET    | /api/v1/babysitters/{id}          | Get by ID                          |
+| PUT    | /api/v1/babysitters/{id}          | Full update                        |
+| PATCH  | /api/v1/babysitters/{id}          | Partial update                     |
+| DELETE | /api/v1/babysitters/{id}          | Hard delete                        |
+| POST   | /api/v1/babysitters/{id}/deactivate | Soft-delete (is_active=False)    |
+
+---
+
+## Sample curl commands
+
+> Replace `BASE=http://localhost:8000` and `ID=<objectid>` as needed.
+
+### Create a babysitter
+
+```bash
+curl -s -X POST "$BASE/api/v1/babysitters/" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "first_name": "Alice",
+    "last_name": "Dupont",
+    "age": 28,
+    "bio": "Experienced nanny with a love for creative play.",
+    "hourly_rate": 18.50,
+    "years_of_experience": 5,
+    "languages": ["English", "French"],
+    "certifications": ["First Aid", "CPR"],
+    "availability": [
+      {"day": "Monday", "from_hour": 8, "to_hour": 18},
+      {"day": "Wednesday", "from_hour": 8, "to_hour": 18}
+    ],
+    "contact": {"email": "alice@example.com", "phone": "+33612345678"},
+    "location": {"city": "Paris", "country": "France", "latitude": 48.8566, "longitude": 2.3522}
+  }' | jq
+```
+
+### List all active babysitters (default page)
+
+```bash
+curl -s "$BASE/api/v1/babysitters/" | jq
+```
+
+### Search with filters
+
+```bash
+curl -s "$BASE/api/v1/babysitters/?city=Paris&min_rate=15&language=French&limit=10" | jq
+```
+
+### Get featured (top 5 by experience)
+
+```bash
+curl -s "$BASE/api/v1/babysitters/featured" | jq
+```
+
+### Get by ID
+
+```bash
+curl -s "$BASE/api/v1/babysitters/$ID" | jq
+```
+
+### Full update (PUT)
+
+```bash
+curl -s -X PUT "$BASE/api/v1/babysitters/$ID" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "first_name": "Alice",
+    "last_name": "Dupont",
+    "age": 29,
+    "hourly_rate": 20.00,
+    "years_of_experience": 6,
+    "languages": ["English", "French", "Spanish"],
+    "certifications": ["First Aid"],
+    "availability": [],
+    "contact": {"email": "alice@example.com"},
+    "location": {"city": "Lyon", "country": "France"}
+  }' | jq
+```
+
+### Partial update (PATCH)
+
+```bash
+curl -s -X PATCH "$BASE/api/v1/babysitters/$ID" \
+  -H "Content-Type: application/json" \
+  -d '{"hourly_rate": 22.00, "bio": "Updated bio."}' | jq
+```
+
+### Soft-delete (deactivate)
+
+```bash
+curl -s -X POST "$BASE/api/v1/babysitters/$ID/deactivate" | jq
+```
+
+### Hard delete
+
+```bash
+curl -s -X DELETE "$BASE/api/v1/babysitters/$ID" -w "%{http_code}"
+# returns 204 No Content
+```
+
+---
+
+## MongoDB index recommendations
+
+Run these in `mongosh` (or via a migration script) for optimal query performance:
+
+```js
+use babysitter_catalog
+
+// Compound index for the most common search pattern
+db.babysitters.createIndex(
+  { "location.city": 1, "hourly_rate": 1, "is_active": 1 },
+  { name: "idx_city_rate_active" }
+)
+
+// Language array index (multikey)
+db.babysitters.createIndex(
+  { languages: 1 },
+  { name: "idx_languages" }
+)
+
+// Experience descending — powers the /featured endpoint
+db.babysitters.createIndex(
+  { years_of_experience: -1, is_active: 1 },
+  { name: "idx_experience_active" }
+)
+
+// Unique email index
+db.babysitters.createIndex(
+  { "contact.email": 1 },
+  { unique: true, name: "idx_email_unique" }
+)
+
+// Audit / time-range queries
+db.babysitters.createIndex(
+  { created_at: -1 },
+  { name: "idx_created_at" }
+)
+```

Chapter07/sitters-catalog/config.py

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+from enum import StrEnum
+
+from pydantic import ConfigDict
+from pydantic_settings import BaseSettings
+
+
+class RepositoryType(StrEnum):
+    MONGO = "mongo"
+    TINYDB_FILE = "tinydb_file"
+    TINYDB_MEMORY = "tinydb_memory"
+
+
+class Settings(BaseSettings):
+    mongo_uri: str = "mongodb://localhost:27017"
+    db_name: str = "babysitter_catalog"
+    app_title: str = "Babysitter Catalog API"
+    debug: bool = False
+
+    # Repository configuration
+    repository_type: RepositoryType = RepositoryType.TINYDB_FILE
+    tinydb_path: str = "data/babysitters_db.json"
+
+    model_config = ConfigDict(env_file=".env")
+
+
+settings = Settings()