Add MongoDB recipe to docs

docs/en/docs/how-to/async-mongodb-motor-beanie.md

@@ -0,0 +1,99 @@
+# Async MongoDB with Motor
+
+**FastAPI** can also be integrated with any <abbr title="Distributed database (Big Data), also 'Not Only SQL'">NoSQL</abbr>.
+
+This includes, but is not limited to:
+
+* **Cassandra**
+* **CouchDB**
+* **ArangoDB**
+* **ElasticSearch**
+* etc
+
+[Motor](https://motor.readthedocs.io/en/stable/index.html) is an asynchronous Python driver for MongoDB.
+
+## Install Motor
+
+```bash
+pip install motor
+```
+
+## Create a MongoDB Client
+
+```Python hl_lines="10"
+from motor.motor_asyncio import AsyncIOMotorClient
+
+class Database:
+    client: AsyncIOMotorClient = None
+
+db = Database()
+
+@app.on_event("startup")
+async def startup_db_client():
+    db.client = AsyncIOMotorClient("mongodb://localhost:27017")
+
+@app.on_event("shutdown")
+async def shutdown_db_client():
+    db.client.close()
+```
+
+## Interact with MongoDB
+
+```Python hl_lines="7-8"
+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.post("/items/")
+async def create_item(item: dict) -> str:
+    collection = db.client.mydatabase.items  
+    result = await collection.insert_one(item)
+    return {"id": str(result.inserted_id)}
+```
+
+## Integrate Beanie ODM
+
+[Beanie](https://roman-right.github.io/beanie/) is an async Python object-document mapper (ODM) built on top of Motor and Pydantic.
+You can extend the Motor example above by defining `Document` models and adding an initialization call to DB startup.
+
+```Python
+from beanie import Document
+
+class Item(Document):
+    name: str
+    description: str
+    tax: float
+```
+
+Initialize Beanie with Motor client:
+
+```Python hl_lines="8-11"
+from beanie import init_beanie
+
+# ...
+
+@app.on_event("startup")
+async def startup_db_client():
+    db.client = AsyncIOMotorClient("mongodb://localhost:27017")
+    await init_beanie(
+        database=db.client.mydatabase,  # Use your database name
+        document_models=[Item]
+    )
+```
+
+## Use Beanie Mapped Object
+
+Since `Item` is also a Pydantic model, it can be integrated into FastAPI's [response model](https://fastapi.tiangolo.com/tutorial/response-model/).
+
+```Python
+@app.get(
+    "/items/{item_id}",
+    response_model=Item,
+    response_model_exclude={"tax"}
+)
+async def get_item(item_id: str) -> Item:
+    item = await Item.find_one({"_id": item_id})
+    if item is not None:
+        return item
+    raise HTTPException(status_code=404, detail="Item not found")
+```

docs/en/mkdocs.yml

@@ -186,6 +186,7 @@ nav:
     - how-to/separate-openapi-schemas.md
     - how-to/custom-docs-ui-assets.md
     - how-to/configure-swagger-ui.md
+    - how-to/async-mongodb-motor-beanie.md
     - how-to/sql-databases-peewee.md
     - how-to/async-sql-encode-databases.md
     - how-to/nosql-databases-couchbase.md