CRUD operations using fastapi

Import statements

    import uvicorn
    from fastapi import FastAPI,HTTPException,status,Query,Response
    from fastapi.params import Body
    from pydantic import BaseModel
    from typing import Optional
    from random import randrange

Post Details or table

    # to valid the post details
    class Post(BaseModel):
        title : str
        content : str
        published:bool = True
        rating:Optional[int] = None

Array of data to perform CRUD operations

    # array of data for CRUD operations
    my_list = [
        {"title":"title of post 1","content":"content for post 1","id":1},
        {"title":"title of post 2","content":"content for post 2","id":2},
        {"title":"title of post 3","content":"content for post 3","id":3}
    ]

Retreving all the post

    # to retrieve all the posts from the array 
    @app.get("/posts")
    def get_all_posts():
        return {"data":my_list}

Creating a post

    # to create a post
    @app.post("/posts")
    def create_post(post:Post):
        post_dict = post.dict()
        post_dict["id"] = randrange(1,10000)
        my_list.append(post_dict)
        return {"data":post_dict}

To get the latest

    # to get the latest post
    @app.get("/posts/latest")
    def get_latest_post():
        post = my_list[-1]
        return {"data":post}

Helper function to find the post exist or not

    # below function helps to find the post with the given id exist or not 
    def find_post(id):
        for p in my_list:
            if p["id"] == id:
                return p

To get the single post data

    # to get the post by id
    @app.get("/posts/{id}")
    def get_post_by_id(id:int):
        post = find_post(id)
        if not post:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND,detail=f"post with ID {id} not found")
        return {"post_detail":post}

Helper function to find the index of post by given id

    # finding the index of the post for given id
    def find_index_post(id):
        for i,p in enumerate(my_list):
            if p["id"] == id:
                return i

To delete the post by id

    # to delete post 
    @app.delete("/posts/{id}" )
    def delete_post(id:int):
        index = find_index_post(id)
        if index is None:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND,
            detail="post with ID {id} is not found"
            )
        my_list.pop(index)
        return {"message":f"Post with ID {id} successfully deleted"}

To update the post using Put

    # updating the post with the given id
    @app.put("/posts/{id}")
    def update_post(id:int,post:Post):
        index = find_index_post(id)
        if index is None:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND,detail=f"Post with ID {id} doesn't exist")
        post_dict = post.dict()
        post_dict["id"] = id
        my_list[index] = post_dict
        return {"message":f"Post with ID {id} updated successfully"}

Command to run the server

    if __name__ == "__main__":
        uvicorn.run("main:app",host="127.0.0.1",port=8000,reload=True)

Code File