/Train-CRUD-FastAPI-Phyton-

Train-CRUD-FastAPI-Phyton- How to Create CRUD Operations with FastAPI

Step 1: Install FastAPI

pip install fastapi

Step 2: Create a FastAPI Application

from fastapi import FastAPI from pydantic import BaseModel from typing import List

app = FastAPI()

Step 3: Define Data Models:

class Item(BaseModel): id: int name: str price: float

Step 4: Create CRUD Routes and Handlers

items = []

@app.get("/items", response_model=List[Item]) async def read_items(): return items

@app.post("/items", response_model=Item) async def create_item(item: Item): items.append(item) return item

@app.put("/items/{item_id}", response_model=Item) async def update_item(item_id: int, item: Item): items[item_id] = item return item

@app.delete("/items/{item_id}") async def delete_item(item_id: int): del items[item_id] return {"message": "Item deleted"

Step 5: Run the Application

uvicorn main:app --reload

Step 6: Test CRUD Operation

1. Create a new item: Send a POST

POST http://localhost:8000/items { "id": 1, "name": "Apple", "price": 0.5 }

2. Get all items: Send a GET request

GET http://localhost:8000/items

3. Update an item: Send a PUT

PUT http://localhost:8000/items/0 { "id": 1, "name": "Orange", "price": 0.5 }

4. Delete an item: Send a DELETE request to delete an item.

DELETE http://localhost:8000/items/1