CRUD APIs Using FastAPI

To create a CRUD (create, read, update, delete) API with FastAPI, you will need to:

Install FastAPI:

pip install fastapi

Define a model for the data that the API will handle. This can be a Pydantic model, which is a simple Python class with class variables and type annotations. For example:

from pydantic import BaseModel

class Item(BaseModel):
    name: str
    description: str
    price: float
    tax: float

Create a database to store the data. You can use any database system that you prefer, such as PostgreSQL or MongoDB.
Define the API endpoints using FastAPI’s @app.post, @app.get, @app.put, and @app.delete decorators. For example:

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()

class Item(BaseModel):
    name: str
    description: str
    price: float
    tax: float

@app.post("/items/")
async def create_item(item: Item):
    return {"item_id": 123}

@app.get("/items/{item_id}")
async def read_item(item_id: int):
    return {"item_id": item_id, "name": "Foo", "description": "A very nice Item", "price": 50.2, "tax": 3.2}

@app.put("/items/{item_id}")
async def update_item(item_id: int, item: Item):
    return {"item_id": item_id, "name": item.name, "description": item.description, "price": item.price, "tax": item.tax}

@app.delete("/items/{item_id}")
async def delete_item(item_id: int):
    return {"item_id": item_id}

In the functions handling the API endpoints, you will need to perform the appropriate database operations to create, read, update, or delete the data.
Run the API using uvicorn:

uvicorn main:app --reload

This is a basic example of how to create a CRUD API with FastAPI. There are many other features and options that you can use to customize and extend your API. You can find more information in the FastAPI documentation: https://fastapi.tiangolo.com/

Thank You for reading!

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